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Huron River Watershed

The Huron River drains portions of seven counties in Southeast Michigan.  The Huron River Watershed is more than 900 square miles and consists of hundreds of tributary creeks, lakes, and the Huron River proper.  The Michigan Department of Environment, Great Lakes, and Energy (EGLE) began sampling intensively on the Huron River due to the city of Ann Arbor detecting Per- and Polyfluoroalkyl Substances (PFAS) in the Huron River, which is the main source of the city of Ann Arbor’s drinking water, and the discovery of perfluorooctanesulfonic acid (PFOS) in the river at levels over the Rule 57 Water Quality Value (WQS) of 11 parts per trillion (ppt) PFOS.  The following is a timeline of PFAS investigation activities in the Huron River Watershed.

These investigations have also led to fish consumption advisories to protect the public, which are available on the Michigan Department of Health and Human Services (MDHHS) Michigan Eat Safe Fish page and the MPART Fish and Wildlife page.  One of the most commonly detected substances in fish tissue is perfluorooctanesulfonic acid (PFOS), in part because it bioaccumulates, or builds up, in the food web. 

Reports

Next Steps

  • EGLE contractor Great Lakes Environmental Center (GLEC) will be collecting sediments this fall as part of a statewide PFAS sediment assessment. Sediment will be collected from Norton Creek and the Huron River. Sediment samples from these two water bodies will be used to determine if PFAS within sediment is toxic to sediment-dwelling insects and whether it accumulates in their tissue. In addition, fish, sediment, and macroinvertebrates will be collected from Kent Lake and Proud Lake to evaluate sediments as a potential source of PFAS to aquatic food webs.
  • EGLE will evaluate known sources of environmental contamination, closed landfills, hazardous waste facilities, and facilities that discharge wastewater to the Huron River.
  • EGLE will continue to sample fish from selected waterbodies in the Huron River watershed and provide results to the MDHHS as available.
  • EGLE will continue to work with the city of Wixom and Tribar to control/reduce discharges to the WWTP with the goal of meeting the Rule 57 water quality values in Norton Creek under the IPP PFAS Initiative.
  • EGLE will conduct precautionary residential well sampling for homes surrounding the two land application sites that received biosolids from the Wixom WWTP. Sampling is currently planned for Fall 2021.
  • The City of Ann Arbor, City of Brighton, Village of Dexter, and City of Wixom will continue to investigate sources of PFOS and require reduction and elimination of PFOS sources under the IPP PFAS Initiative.
  • As of February 2022, the Michigan Department of Environment, Great Lakes, and Energy has collected or plans to collect the following fish samples from the Huron River or nearby water bodies. The fillets have been or will be analyzed for PFAS and other contaminants. The Michigan Department of Health and Human Services is evaluating the results for the "Eat Safe Fish" consumption advisories which are based on concentrations of mercury, PFOS, and other contaminants. Anglers should refer to the advice posted on the MPART PFAS in Fish webpage and the Michigan Eat Safe Fish webpage.

    ND indicates that PFOS was not detected in the sample. The asterisk (*) indicates that the Pontiac Lake largemouth bass samples were analyzed as whole fish and not as fillets.

     

    Water Body

    Location

    Latitude

    Longitude

    Species

    Collection Year

    PFOS (ppb) Range

    Huron River

    Pontiac Lake

    42.6692

    -83.461

    Largemouth Bass*

    2017

    ND – 20.9

    Huron River

    Proud Lake

    42.56839

    -83.52087

    Bluegill

    2019

    2.7 – 21.8

    Huron River

    Proud Lake

    42.56839

    -83.52087

    Pumpkinseed

    2021

    Pending

    Huron River

    Proud Lake

    42.56839

    -83.52087

    Rock Bass

    2019

    0.7 – 19.2

    Huron River

    Proud Lake

    42.56839

    -83.52087

    Largemouth/Smallmouth Bass

    2019

    2.6 – 307.0

    Huron River

    Proud Lake

    42.56839

    -83.52087

    Largemouth/Smallmouth Bass

    2021

    Pending

    Huron River

    Hubbell Pond

    42.58614

    -83.6141

    Largemouth Bass

    2018

    516.0 – 1,408

    Huron River

    Kent Lake

    42.52957

    -83.64402

    Black Crappie

    2017

    870 – 1,378

    Huron River

    Kent Lake

    42.52957

    -83.64402

    Pumpkinseed

    2019

    18.6 – 184.0

    Huron River

    Kent Lake

    42.52957

    -83.64402

    Bluegill/Pumpkinseed

    2020

    32.0 – 114.0

    Huron River

    Kent Lake

    42.52957

    -83.64402

    Bluegill/Pumpkinseed

    2021

    Pending

    Huron River

    Kent Lake

    42.52957

    -83.64402

    Largemouth Bass

    2017

    1,016 – 1,998

    Huron River

    Kent Lake

    42.52957

    -83.64402

    Largemouth Bass

    2019

    167.0 – 441.0

    Huron River

    Kent Lake

    42.52957

    -83.64402

    Largemouth Bass

    2020

    301.0 – 500.0

    Huron River

    Kent Lake

    42.52957

    -83.64402

    Largemouth Bass

    2021

    Pending

    Huron River

    Base Line Lake

    42.42779

    -83.89471

    Bluegill

    2018

    56.3 – 162.4

    Huron River

    Base Line Lake

    42.42779

    -83.89471

    Bluegill

    2020

    14.1 – 66.3

    Huron River

    Base Line Lake

    42.42779

    -83.89471

    Rock Bass

    2020

    ND – 76.7

    Huron River

    Base Line Lake

    42.42779

    -83.89471

    Largemouth Bass

    2018

    73.2 – 366.3

    Huron River

    Base Line Lake

    42.42779

    -83.89471

    Largemouth Bass

    2020

    45.7 – 187.0

    Huron River

    Portage Lake

    42.42177

    -83.91758

    Bluegill

    2018

    5.0 – 138.0

    Huron River

    Portage Lake

    42.42177

    -83.91758

    Largemouth Bass

    2018

    6.6 – 173.8

    Huron River

    Barton Pond

    42.31332

    -83.78766

    Bluegill/Pumpkinseed

    2018

    8.7 – 19.9

    Huron River

    Argo Pond

    42.29262

    -83.74523

    Rock Bass

    2015

    102.3 – 487.5

    Huron River

    Argo Pond

    42.29262

    -83.74523

    Rock Bass

    2018

    13.5 – 60.9

    Huron River

    Argo Pond

    42.29262

    -83.74523

    Rock Bass

    2020

    ND – 25.2

    Huron River

    Argo Pond

    42.29262

    -83.74523

    Bluegill

    2018

    ND – 23.6

    Huron River

    Argo Pond

    42.29262

    -83.74523

    Bluegill

    2020

    10.1 – 51.7

    Huron River

    Argo Pond

    42.29262

    -83.74523

    Largemouth/Smallmouth Bass

    2018

    20.6 – 64.7

    Huron River

    Argo Pond

    42.29262

    -83.74523

    Largemouth/Smallmouth Bass

    2020

    27.7 – 64.2

    Huron River

    Belleville Lake

    42.21447

    -83.47022

    Bluegill

    2018

    2.2 – 41.3

    Huron River

    Belleville Lake

    42.21447

    -83.47022

    Bluegill

    2021

    18.6 – 31.3

    Huron River

    Belleville Lake

    42.21447

    -83.47022

    Rock Bass

    2021

    63.1 – 164

    Huron River

    Belleville Lake

    42.21447

    -83.47022

    Smallmouth Bass

    2018

    27.5 – 89.0

    Huron River

    Belleville Lake

    42.21447

    -83.47022

    Smallmouth Bass

    2021

    16.7 – 66.8

    Huron River

    Belleville Lake

    42.21447

    -83.47022

    Walleye

    2021

    21.1 – 40.5

    Huron River

    Ford Lake

    42.21696

    -83.58466

    Largemouth/Smallmouth Bass

    2020

    12.8 – 92.6

    Huron River

    Ford Lake

    42.21696

    -83.58466

    Smallmouth Bass

    2021

    20.6 – 108.0

    Huron River

    Ford Lake

    42.21696

    -83.58466

    Bluegill/Pumpkinseed

    2020

    11.0 – 75.5

    Huron River

    Ford Lake

    42.21696

    -83.58466

    Bluegill

    2021

    28.2 – 64.6

    Huron River

    Ford Lake

    42.21696

    -83.58466

    Rock Bass

    2020

    22.6 – 53.3

    Huron River

    Ford Lake

    42.21696

    -83.58466

    Rock Bass

    2021

    22.2 – 105.0

    Huron River

    Ford Lake

    42.21696

    -83.58466

    Walleye

    2021

    18.7 – 41.4

    Huron River

    Flat Rock

    42.10459

    -83.30521

    Channel Catfish

    2017

    2.0 – 22.2

    Huron River

    Flat Rock

    42.10459

    -83.30521

    Black Crappie

    2018

    ND – 27.6

    Huron River

    Flat Rock

    42.10459

    -83.30521

    Largemouth Bass

    2018

    9.6 – 26.7

    Huron River

    Flat Rock

    42.10459

    -83.30521

    Largemouth Bass

    2020

    7.5 – 22.8

    Huron River

    Flat Rock

    42.10459

    -83.30521

    Bluegill

    2018

    7.7 – 24.7

    Huron River

    Flat Rock

    42.10459

    -83.30521

    Bluegill/Pumpkinseed

    2020

    ND – 25.7

    Huron River

    Rockwood

    42.06865

    -83.25482

    Largemouth Bass

    2021

    Pending

    Lake Erie

    Huron River, Flat Rock

    42.10459

    -83.30521

    Rainbow Trout (Steelhead)

    2019

    1.7 – 4.8

    Pettibone Creek

    Milford Pond

    42.59023

    -83.60261

    Bluegill

    2018

    ND – 4.8

    Bruin Lake

    Pinckney Rec Area

    42.41948

    -84.03837

    Bluegill/Pumpkinseed

    2021

    Pending

    Mann Creek

    Moraine Lake

    42.55914

    -83.7171

    Black Crappie

    2018

    2.9 – 9.7

    Mann Creek

    Moraine Lake

    42.55914

    -83.7171

    Bluegill

    2018

    ND – 14.8

    Mann Creek

    Moraine Lake

    42.55914

    -83.7171

    Largemouth/Smallmouth Bass

    2018

    4.1 – 10.8

    Sandy Bottom Lake

    n.e. of Whitmore Lake

    42.45203

    -83.71462

    Bluegill/Pumpkinseed

    2019

    1.4 – 16.9

    Sandy Bottom Lake

    n.e. of Whitmore Lake

    42.45203

    -83.71462

    Largemouth Bass

    2019

    ND – 75.4

    Fish Lake

    n.w. of Sandy Bottom Lake

    42.45534

    -83.72316

    Bluegill

    2021

    1.3 – 4.9

    Woodland Lake

    Livingston County

    42.55445

    -83.78155

    Bluegill/Pumpkinseed

    2019

    1.1 – 5.6

    Woodland Lake

    Livingston County

    42.55445

    -83.78155

    Largemouth Bass

    2019

    3.5 – 18.5

    Ore Lake

    Livingston County

    42.80951

    -83.79536

    Bluegill

    2019

    4.9 – 20.0

    Whitmore Lake

    Livingston County

    42.4287

    -83.75379

    Bluegill/Pumpkinseed

    2019

    2.0 – 4.6

    Bass Lake

    s.e. of Brighton

    42.45425

    -83.86102

    Bluegill

    2019

    1.7 – 9.3

    Bass Lake

    s.e. of Brighton

    42.45425

    -83.86102

    Largemouth Bass

    2019

    ND – 14.4

    Silver Lake

    w. of Portage Lake

    42.42113

    -83.96666

    Bluegill

    2020

    ND

    Washago Pond

    Willow Metropark

    42.1304

    -83.3729

    Pumpkinseed

    2020

    ND – 110.0

    Joslin Lake

    s.e. of Stockbridge

    42.41876

    -84.07050

    Bluegill

    2019

    1.0 – 13.0

    Joslin Lake

    s.e. of Stockbridge

    42.41876

    -84.07050

    Largemouth Bass

    2019

    1.4 – 27.7

    Long Lake

    w. of Pontiac

    42.61073

    -83.45627

    Bluegill

    2019

    1.6 – 7.8

    Long Lake

    w. of Pontiac

    42.61073

    -83.45627

    Largemouth Bass

    2019

    ND – 9.9

Investigation Timeline

  • 2014

    • March 5, 2014 – The city of Ann Arbor sampled for PFAS compounds in drinking water, as required by the United States Environmental Protection Agency (USEPA) under Round 3 of the Unregulated Containment Monitoring Rule (UCMR3). PFOS was detected in the drinking water sample (main reservoir – treated water) at 43 parts per trillion (ppt). Review the city of Ann Arbor’s 2014 Water Quality Report.

    2016

    • October 2016 - The city of Ann Arbor began collecting monthly PFAS samples from the raw river source and finished water.  The results are provided to EGLE monthly. To date, all the results obtained are below the USEPA Lifetime Health Advisory of 70 ppt, either individually or combined with the exception of a finished water result of 88.1 ppt in October 2018.
    • March and July 2016 – The city of Ann Arbor conducted water sampling for PFAS; they tested raw water sources as well as finished water.  All but one of these upstream locations had detectable levels of PFAS and no obvious source was able to be pinpointed.  The sample locations were:
      • Main water reservoir (treated water) and the raw river intake (untreated water).
      • Two raw water production wells (untreated groundwater).
      • Surface water within the Huron River, Barton Pond, and Honey Creek (upstream of the intake; untreated surface water). See map of surface water results below.

    City of Ann Arbor Surface Water Samples PFOS Results (ng/L)

    2017

    • In late 2017, the city of Ann Arbor began a Granular Activated Carbon (GAC) filter pilot study for treating its water supply. The sand in two of the city of Ann Arbor’s 26 active filters was replaced with a full bed depth of GAC to evaluate whether the increased depth of GAC will improve the filters’ ability to remove contaminants. With favorable results from the pilot study, the sand in the remaining 24 filters was replaced with full GAC in the Spring of 2019.  The GAC is replaced on a rotating basis every 5 years.

    2018

    • Mid-July 2018 – The city of Ann Arbor’s municipal water supply was tested as part of the EGLE’s statewide initiative to test all public water supplies and schools with their own wells. Both the finished water and the intake for the supply were sampled. The results were available mid-August and finished water results were 4 ppt PFOS + PFOA; intake results were 11 ppt PFOS + PFOA.  Additional results are available on the public water supply statewide sampling initiative page

    2019

    • In 2019, EGLE continued monthly sampling of the city of Ann Arbor’s water supply as part of the statewide initiative with all results below 10 ppt combined PFOS+PFOA.

    2020

    • In 2020, EGLE will perform quarterly monitoring of the City of Ann Arbor’s water supply as part of the statewide initiative. Due to COVID-19 access restrictions, the first quarter sample could not be collected. The City of Ann Arbor, in collaboration with Dr. Detlef Knappe’s research group at North Carolina State University, are conducting pilot tests on both granular activated carbon and ion exchange for PFAS removal. The research is funded primary through a grant from the Water Research Foundation. The City is studying how media type, empty bed contact time, operating conditions, and other variables impact PFAS removal and breakthrough over time. The results of this research will be used to optimize the City’s current PFAS management strategy and to guide future investments needed for long-term PFAS management.
  • February 

    • February 22 - As part of the Industrial Pretreatment Program (IPP)  PFAS Initiative, EGLE's Water Resources Division (WRD) sent letters to the City of Ann Arbor, the City of Brighton, the Village of Dexter, and the City of Wixom requiring them to evaluate potential sources of PFOS and PFOA that may be discharging to their sanitary sewers and potentially passing through pollutants to the Huron River Watershed.  Reports were due in June and October 2018.

    May

    • May 8 - Due to the elevated levels of PFOS detected by the city of Ann Arbor in the Huron River, EGLE collected fish from Baseline and Portage Lakes for PFAS analysis. EGLE also sent stored Kent Lake fish samples (that had been collected in 2017 by the Michigan Department of Natural Resources (MDNR) as part of routine fish contaminant monitoring) to the Michigan Department of Health and Human Services (MDHHS) lab for PFAS analysis.
    • May 8 - EGLE collected groundwater samples from four monitoring wells at the former Daimler Chrysler Scio Facility located at 2880 Zeeb Road, Dexter, Michigan.  Historical operations at the facility were primarily automobile parts manufacturing, and at one time, the facility housed a small plating line and treated plating wastes, which may have contained PFAS.  This facility is located on the Huron River upstream of the city of Ann Arbor's intake.  Preliminary results: PFAS was detected in all samples.  No samples exceeded EGLE's cleanup criteria for groundwater used as drinking water of 70 ppt for PFOS and PFOA, individually or combined.   

    June

    • June 4 - EGLE's statewide initiative to test all community water supplies and schools with their own wells began in Oakland County, including areas within the Huron River Watershed. Sample results are available on the public water supply statewide sampling survey page.
    • Of the results received, five supplies within the Huron River Watershed returned values above non-detect (ND).
      • Glengary Elementary - Total tested PFAS was 77 ppt and PFOA + PFOS was 20 ppt.
      • Heritage Apartments - Total tested PFAS was 36 ppt and PFOA + PFOS was ND.
      • In the remaining three of these cases, results were <10 ppt for total tested PFAS and ND for PFOA + PFOS.
    • June 27 - The Wixom Wastewater Treatment Plant (WWTP) conducted sampling as part of the IPP PFAS Initiative.  The city of Wixom WWTP discharges to Norton Creek, which is a tributary to the Huron River five miles upstream of Kent Lake and east of the village of Milford.  Results indicated effluent concentration of 290 ppt PFOS.  The Wixom WWTP began an investigation into the potential source of contamination in their waste stream, and results are summarized below.
      • May 15 - The city of Wixom identified a chrome plating facility, Tribar Manufacturing LLC (Tribar), Plant 4, which has been in operation since approximately 2000, as the source of high levels of PFOS (28,000 ppt) to the city of Wixom's sanitary sewer system.
      • May 15 - The city of Wixom also tested Tribar, Plant 5, which began production in 2017 and also does chrome plating. The wastewater discharge from Plant 5 was less than 20 ppt PFOS to the city of Wixom's sanitary sewer system and determined to not be a significant source.
      • June 14 - A third potential source was sampled and determined to have 2.2 ppt of PFOS in their discharge.  The city of Wixom has not identified any other industrial users as contributing significant levels of PFAS to their system.

    July

    • July 16 - EGLE's statewide initiative to test all community water supplies and schools with their own wells began in Washtenaw County, including areas within the Huron River Watershed. Sample results are available on the public water supply statewide sampling survey page. Of the results received and in addition to the city of Ann Arbor municipal supply (mentioned above), Emerson Elementary School - returned a value of 14 ppt for total tested PFAS (PFOA + PFOS was ND).
    • July 17 - EGLE and MDHHS provided an overview via a webinar to local units of governments in the Huron River Watershed regarding PFAS and planned fish and surface water sampling. 
    • July 18 - EGLE's statewide initiative to test all community water supplies and schools with their own wells began in Livingston County, including areas within the Huron River Watershed. Sample results are available on the public water supply statewide sampling survey page. Of the results received, five supplies within the Huron River Watershed returned values above ND. In all five of these cases, these results were <10 ppt for total tested PFAS, and in only one case (results not yet public) did a supply return a non-detect value for PFOA + PFOS.
    • July 24 - To determine the extent of elevated levels of PFOS in the Huron River, EGLE sampled 17 locations along the Huron River main stem and from select tributaries near where they meet with the Huron River including: Norton Creek, Mill Creek, Honey Creek, and Willow Run Creek.

    Huron River Surface Water Results July 24, 2018

    August

    • August 3 - EGLE received the results from the Kent Lake fish samples sent to the MDHHS lab on May 8, 2018. PFOS levels in the fish were elevated.  
    • August 4 - The MDHHS issued a "Do Not Eat" fish advisory to cover the Huron River in Livingston, Oakland, and Washtenaw Counties. This covered:
      • Hubbell Pond (Mill Pond) and Kent Lake in Oakland County.
      • Ore Lake, Strawberry Lake, Zukey Lake, Gallagher Lake, Loon Lake, and Whitewood Lake in Livingston County.
      • Baseline and Portage Lakes near the Livingston/Washtenaw County line.
    • August 6 - EGLE sent a compliance letter to the Wixom WWTP Operator in Charge requiring the WWTP to work to reduce PFOS discharged to Norton Creek and from accumulating in biosolids. The letter also required the WWTP to sample for PFAS monthly, to monitor at confirmed sources sufficient to characterize their contribution to the waste stream coming into the WWTP, and to sample its biosolids.
    • August 9 - EGLE staff visited the Wixom Fire Training Center as a potential source of PFAS to the Huron River Watershed. Wixom Fire Department staff indicated that PFAS containing foams have not been used on the site.
    • August 14 - EGLE sampled permitted wastewater discharges in the vicinity of Kent Lake for PFAS. The locations sampled included the Milford WWTP, South Lyon WWTP, GM Proving Grounds, and the Seamless Tube groundwater cleanup site.
    • August 23 - EGLE received results from the July 24 sampling of the Huron River and its tributaries. Norton Creek was identified as a significant source of PFOS to the Huron River. A summary and map of sampling results are provided below.
      • Elevated levels of PFOS (5,500 ppt) in Norton Creek.
      • Gradual decrease of PFOS levels as you travel downstream.
      • Elevated levels of PFOS (26 ppt PFOS) in Willow Run Creek, a tributary to the Huron River in Wayne County. EGLE staff are working to evaluate potential sources of PFAS to Willow Run Creek.
    • August 24 - The MDHHS expanded the original "Do Not Eat" fish advisory to include the Huron River at North Wixom Road and Norton Creek in Oakland County.
    • August 28 - EGLE's Huron River Work Group met to coordinate efforts across EGLE divisions and EGLE's Executive Office.
    • August 29 - EGLE received results for fish samples collected on May 8, 2018, from Baseline Lake and Argo Pond collected in 2015.
      • The 2015 Argo Pond fish were from routine fish contaminant monitoring (samples were not analyzed for PFAS at that time because the EGLE's Water Resources Division had no information to indicate a concern with PFAS in this watershed).    
    • August 29 - The city of Wixom began monthly follow-up sampling of the city of Wixom's effluent discharge from the WWTP in accordance with the IPP PFAS Initiative requirements. Samples of biosolids generated at the WWTP were also collected.  The city of Wixom is currently landfilling their biosolids. The city of Wixom is working with Tribar to reduce the level of PFAS being discharged to their sanitary sewer.
    • August 29 - The effluent from the Wixom WWTP was 4800 ppt for PFOS.
    • August 29 and 30 - To identify whether there are other significant sources of PFAS contributing to the elevated PFOS levels in Norton Creek, EGLE staff collected in-stream surface water samples of the Huron River upstream of Kent Lake and at various locations within Norton Creek and other tributaries. Potential sources were identified, and sampling was conducted to bracket these sources, including:
      • The Ford Wixom Plant, a former automotive manufacturing facility where fire training with aqueous film forming foam was conducted.
      • Kelsey Hayes, a former wheel production facility in Milford.
      • A fire training facility used by the city of Wixom.
      • Storm water discharges from Tribar, Plant 4
      • The discharge from a state-funded groundwater cleanup facility (Coe's Cleaners).
      • Other areas with significant industrial operations.
      • Sample results were received on September 27.
    • August 30 - EGLE received results for channel catfish, collected in 2017, from the Flat Rock Impoundment of the Huron River.  
    • August 31 - The MDHHS extended the "Do Not Eat" Advisory to Lake Erie based on the Baseline Lake and Argo Pond fish results from August 29, 2018.
    • August 31 - EGLE met with Republic Services to discuss and finalize a groundwater sampling plan for a closed landfill in Lyon Township, which is near Kent Lake, as well as to develop a schedule for collecting samples.
    • August 31 - The Daimler Chrysler Scio facility in Scio Township was sampled as a follow-up to the initial May 8, 2018 sampling. The facility was sampled at six groundwater monitoring wells. In addition, the on-site employee drinking water well was sampled. These wells were selected to determine if impacted water has a potential to discharge to the Huron River at PFOS concentrations above the Part 201 Generic Cleanup Criteria for groundwater surface water interface of 12 ppt.
    • August 31 - EGLE received results from point source monitoring of wastewater discharges in the vicinity of Kent Lake conducted on August 14, 2018.Results are below; no significant sources were identified:
      • Milford WWTP (3 ppt PFOS)
      • South Lyon WWTP (4.4 ppt PFOS)
      • GM Proving Grounds (6.4 ppt PFOS)
      • Seamless Tube cleanup site (<0.4 ppt PFOS)
    • August 31 - As of the end of August, sampling related to EGLE's statewide initiative to test all community water supplies and schools with their own wells is >90% complete within the Huron River Watershed. As remaining sampling results become available, they will be shared on the public water supply statewide sampling survey page.

    Details of Huron River and Norton Creek REsults

    September

    • September 13 - EGLE collected fish from Belleville Lake and the Flat Rock Impoundment.
    • September 18 - The MDHHS issued an avoid swallowing foam on the Huron River.
    • September 19 - EGLE received results for largemouth bass samples that were collected May 8, 2018, from Portage Lake.  
    • September 19 - The city of Wixom issued an administrative compliance order to Tribar.  The order confirms that Tribar's discharge of PFOS caused the Wixom WWTP's effluent to exceed water quality Values and requires Tribar to submit by October 19, 2018, a work plan describing the strategy the company will implement to reduce PFOS effluent discharges.
    • September 20 - EGLE and MDHHS provided an update via a webinar for local units of government, local health departments, and other stakeholders on PFAS findings and activities in the Huron River Watershed.
    • September 25 - 28 - Eight groundwater monitoring wells associated with the Lyon Development Landfill were sampled and analyzed for PFAS.PFOA was ND in all samples. PFOS was ND or detected at very low levels with 1.7 ppt being the highest concentration.
    • September 26 - EGLE received a report following the August sampling event at the Daimler Chrysler Scio facility which revealed that PFOS is discharging to the Huron River above the Part 201 groundwater surface water interface criterion.  There were no detections above the Part 201 groundwater for drinking water criterion on-site, including the potable well (PW-5).EGLE is in the process of reviewing the report and meeting with the responsible party to determine next steps. 
    • September 27 - EGLE received results from the Huron-Clinton Metroparks' self-initiated sampling of their wells; they were ND.
    • September 27 - EGLE received results from several recent surface water and point source samples for PFOS in the Upper Huron River Watershed, including the August 29 and 30 sampling event. Several samples had elevated PFOS levels.
      • The Ford Wixom Plant, a former automotive manufacturing facility where fire training with aqueous film forming foam was conducted.
      • Kelsey Hayes, a former wheel production facility in Milford.
      • A fire training facility used by the city of Wixom.
      • Storm water discharges from Tribar, Plant 4
      • The discharge from a state-funded groundwater cleanup facility (Coe's Cleaners).
      • Other areas with significant industrial operations.

        Upper Huron River Watershed Surface Water & Point Source PFOS Monitoring

    • Actions taken in response to results received on September 27:
      • The city of Wixom had previously been notified of effluent results by EGLE on August 29, 2018.Due to the new sample results, a follow-up discussion was held with EGLE, city of Wixom, and Tribar to discuss effluent results, recent surface water sampling results, and status of corrective actions.
        • Tribar Plant 4 Results
          • Well: 6 ppt PFOS
          • Stormwater: 8,000 ppt PFOS. The stormwater from this facility was later determined to discharge to the Rouge River Watershed not the Huron River Watershed.
      • EGLE staff met on September 28, 2018, to discuss next steps with Coe's Cleaners, a groundwater cleanup site managed by EGLE. The groundwater cleanup discharges to the Mill Pond in the village of Milford and was identified as a source to the Huron River above Kent Lake. EGLE tasked contractor, AECOM, to conduct sampling at all three wells at Coe's Cleaners, as well as the influent and effluent at the air stripper system.
        • Coe's Cleaners Results
        • Additional sample results were ND for this site and it is no longer being considered as a potential source.
      • EGLE met internally on October 1, 2018, to discuss next steps based on the new data with representatives from each of EGLE divisions.
    • September 28 - EGLE collected surface water and fish samples from Argo Pond, Barton Pond, and Hubbell Pond.

    October

    • October 1 - EGLE collected surface water and fish samples from Mill Pond.
    • October 1 - Tribar issued a press release indicating that a temporary GAC mobile unit would be installed on October 5, 2018, to treat their industrial wastewater to remove PFOS prior to discharge into the city of Wixom's sanitary sewer. A permanent system will be installed in December.
    • October 4 - EGLE provided results from Portage Lake largemouth bass to the MDHHS collected earlier in the summer. This data helps with the ongoing investigation but does not alter the existing fish consumption advisory.
    • October 4 - EGLE sent a violation notice to Tribar as a result of the elevated storm water discharges from the facility. Tribar will be required to conduct a storm water characterization study and implement appropriate controls.
    • October 4 - EGLE and MDHHS participated in a public meeting hosted by the Huron River Watershed Council, the Village of Milford, Milford Township, and the City of Wixom at the Milford Civic Center.
    • October 11 - The effluent from the Wixom WWTP was 940 ng/l for PFOS. The effluent from Tribar Plant 4 into the collection was <1.6 ng/l for PFOS.
    • October 15 - The effluent from the Wixom WWTP was 530 ng/l for PFOS.
    • October 16 - EGLE met with representatives from the Daimler Chrysler Scio facility to discuss the next phase of investigation for the PFAS investigation at the facility that will include delineation of groundwater contamination and storm water sampling. The facility will be submitting a work plan for EGLE review and approval in December.
    • October 29-30 - EGLE collects surface water samples from the Upper Huron River Watershed, including from sites on the Huron River, Mann Creek, Woodruff Creek, Pettibone Creek, Norton Creek, Ore Creek, Arms Creek, the Portage River, Honey Creek (Livingston County), and Davis Creek.

    November

    • November 6 - The effluent from the Wixom WWTP was 240 ppt for PFOS.
    • November 14 - Influent, effluent, and biosolids samples were collected at Wixom WWTP by AECOM as part of WRD's biosolids survey.  The effluent was 270 ppt for PFOS.
    • November 26 - EGLE sampled two groundwater treatment systems (granulated activated carbon-GAC) influent and effluent at the Residential Wells Holly Road Facility near Brighton High School north of Brighton Lake and two PFAS samples (influent and effluent) at Main Street Gregory near M-106 and Church Street, Unadilla Township adjacent to an unnamed County Drain flowing SSE.  Results were received late January 2019:
      • Residential Wells Holly Road: PFOS and PFOA were Non Detect in both the influent and the effluent; other PFAS were detected. Resampling is planned for Spring 2019.
      • Main Street Gregory: PFAS was below criteria but still present; resampling is planned for Spring 2019.
    • November 27 - EGLE sampled the permitted wastewater discharge from the Sweepster-Harley Attachments facility located at 2800 North Zeeb Road, Dexter (site of former Daimler Chrysler Facility).Results were less than 1.6 ppt for PFOS.
    • November 27 - EGLE sampled the permitted treated wastewater from the Pall Life Sciences Facility located at 642 South Wagner Road, Ann Arbor. Results were ND for Total Tested PFAS.
    • November 28 - EGLE received results from the October 29 and 30 sampling event. PFOS concentrations in the Huron River exceeded 11 ppt at seven of eight sites, ranging from 15 to 88 ppt.  The eighth Huron River site, upstream of the Norton Creek confluence, had a PFOS concentration of 1 ppt. 

    December

    • December 4 - The effluent from the Wixom WWTP was 150 ppt for PFOS.
    • December 18 - EGLE and MDHHS provided an update on Huron River PFAS data and site investigations to local units of government, local health departments, and other stakeholders in the watershed via a webinar.
    • December 18 - EGLE and MDHHS participated in a public meeting hosted by the Huron River Watershed Council, the City of Ann Arbor, and the Washtenaw County Health Department at the Washtenaw Community College in Townsley Auditorium.
    • December 18 - EGLE received a work plan for the next phase of investigation for the Daimler Chrysler Scio Facility and a revised work plan on December 20, 2018.  This work plan was approved by EGLE on December 21, 2018.  Work to be performed included additional sampling of monitoring wells present at the Facility to further investigate and define the presence of PFAS.  The work plan also required stormwater sampling during wet weather from 5 outfalls at the Facility.  Groundwater sampling will be conducted in January 2019, and stormwater sampling in early February 2019. 
  • January

    • January 9 - 11 Groundwater sampling conducted at the Daimler Chrysler Scio Facility as part of the December 2018 work plan.
    • January 15 - The effluent from the Wixom WWTP was 130 ppt for PFOS.
    • January 22 - EGLE WRD approved the City of Ann Arbor's IPP PFAS Initiative report and required ongoing quarterly PFAS monitoring and reporting.

    February

    • February 11 - Daimler Chrysler Scio Facility: EGLE received a report summarizing the results of the groundwater sampling; the report confirmed that PFOS is venting to the Huron River over the Groundwater Surface Water Interface (GSI) criterion in two areas.  Similar to the first sampling event, no PFOA + PFOS concentrations over the groundwater cleanup criteria (70 ppt) were detected.  Storm water results were not yet available from the laboratory and were not included in the report.  The report also made recommendations for additional investigation; the focus of which is to attempt to complete horizontal and vertical delineation of the PFOS plumes venting to the Huron River and to attempt to determine the source of the PFOS contamination in the two areas.

    Huron Watershed Lakes & Impoundments with Fish Tissue PFOS Complete or Pending/Planned

    • February 13 - The effluent from the Wixom WWTP was 53 ppt for PFOS.
    • February 20 - Daimler Chrysler Scio Facility. EGLE met with the consultant to further refine the next phase of investigation.  A work plan for that investigation will be developed following receipt and evaluation of the stormwater samples collected in early February. That work plan is expected to be completed by March 15, 2019.

    March

    • March 4 - EGLE received a work plan for additional PFAS delineation at the Daimler Chrysler Scio facility.  The work plan was approved on March 7.
    • March 12 - The effluent from the Wixom WWTP was 30 ppt for PFOS.
    • March 20 - EGLE collected effluent samples from Brighton WWTP and South Lyon WWTP. Sample results at Brighton WWTP were 11 ppt for PFOS and 19 ppt for PFOA. Sample results at South Lyon WWTP were 0.99 ppt for PFOS and 6.3 ppt for PFOA.
    • March 26 -- EGLE received fish PFAS results for Mann Creek, Pettibone Creek, Belleville Lake, and Flat Rock impoundment.   

    an egle employee stands near an outpouring of water, collecting a sample

    April

    • April 1 - After evaluating the surface water and fish tissue findings for PFAS in Norton Creek and in the Huron River downstream from Norton Creek, deer were sampled for PFAS and Polychlorinated Biphenyl (PCB) testing from the Proud Lake Recreation Area adjacent to the Norton Creek area.  Twenty deer were taken and tissues from their kidney, heart, liver, and muscle were tested for PFAS and PCB.
    • April 3 - The effluent from the Wixom WWTP was 19 ppt for PFOS.
    • April 6 - EGLE received a report from Daimler Chrysler Scio facility on results of storm water sampling at the site.  No impacts to storm water above GSI or drinking water criteria were detected.
    • April 10-11 - AECOM sampled 12 residential wells, 7 drinking water wells at the Proud Lake Recreation Area, Milford's two municipal drinking water supply wells, and six surface water locations for PFAS to evaluate drinking water safety and communication with the surface water and groundwater in the vicinity of Norton Creek.
    • April 11 - EGLE's contractor AECOM sampled soil and surface water for PFAS on two land application sites that historically received biosolids from the Wixom WWTP. Sampling was conducted as part of a larger study to evaluate PFAS at biosolids land application sites across the state. PFAS was detected in the soil and surface water. Several of the surface water samples exceeded the Water Quality Value for PFOS of 12 ppt.
    • April 19 - EGLE's WRD approves reports received from the City of Dexter for the IPP PFAS Initiative.  The reports say that one industrial user was found to be discharging above the PFOS screening level but show that Dexter WWTP effluent is below water quality Values for PFOS.  EGLE requires ongoing semi-annual monitoring and reporting for PFAS.
    • April 25 - EGLE collected fish from Proud Lake.  The MDNR's Fisheries Division provided Rainbow trout (steelhead) from the Huron River downstream of Flat Rock.
    • April 26 - EGLE and the MDHHS provided an update on Huron River PFAS data and site investigations to local units of government, local health departments, and other stakeholders in the watershed via a webinar.
    • April 29-30 - EGLE collected surface water samples and storm water samples from Willow Run, Honey Creek (Washtenaw County), Horseshoe Creek, Pettibone Creek, Norton Creek, the outlet of Lake Sherwood, and the Huron River.
    • April 30 - EGLE received a report from Daimler Chrysler Scio with results of phase 1 of additional PFAS investigation and a work plan for phase 2 of the investigation.  Additional delineation of PFAS impacts in four source areas at the site required.

    May

    • May 1 - EGLE received fish collected from Whitmore Lake.
    • May 2-3 - Results received from April 10-11 residential well sampling event in the Norton Creek vicinity.  All residential wells and Milford's supply wells were ND for PFAS.  Six of the seven Proud Lake Recreation Area wells were ND for PFAS; one well had a detection of 11ppt PFOA.  The DNR prohibited the use of the well for public use.  PFAS were detected in all of the surface water samples.
    Huron River Study Area Residential & Surface Water Total PFAS Concentration May 2019
    • May 16 - 17 - EGLE received results from the April 29-30, 2019 surface water sampling event. PFOS was detected in samples from 12 sites and exceeded 11 ppt at five sites. Overall, these results suggest that surface water PFOS concentrations in Norton Creek, downstream of the Wixom WWTP continue to remain low relative to findings from earlier sampling efforts. This one-time sampling event did not find any potential sources in Hamburg Lake, Horseshoe Creek, or the outlet of Lake Sherwood. There may be potential sources of PFAS in Willow Run upstream of the I-94 Service Drive, in the west tributary of Willow Run, and at outfall WROF002; EGLE will conduct follow-up work in this watershed. See Surface Water Sampling Update for more details.
    • May 17 - The effluent from the Wixom WWTP was 27 ppt for PFOS.
    • May 30 - EGLE collected fish from Bass Lake and Sandy Bottom Lake.
    • May 31 - EGLE approved the work plan for next phase of PFAS investigation at the Daimler Chrysler Scio facility.

    June

    • June 4 - EGLE received results for rainbow trout samples collected on April 12, 2019 by MDNR Fisheries Division from the Huron River downstream of Flat Rock.  The UCL was 4 ppb PFOS.  
    • June 12 - The effluent from the Wixom WWTP was 73 ppt for PFOS.

    July

    • July 2 - The effluent from the Wixom WWTP was 31 ppt for PFOS. 
    • July 11 - Drinking water statewide survey sampling at Quality Steel (Milford, Michigan). This sample point was a drinking fountain in the building lobby, and results were 904 ppt total tested PFAS and 201 ppt PFOA + PFOS. This led to a joint investigation between EGLE's Drinking Water and Environmental Health Division (DWEHD), WRD, Materials Management Division (MMD), as well as MDHHS and Oakland County Health Department. 
    • July 12 - EGLE sent a general transmittal to Willow Run Airport requiring the facility to develop a short-term stormwater characterization study plan to conduct wet-weather and dry-weather surface water sampling for PFAS as a result of elevated surface water levels in the creek.
    • July 16 - EGLE collected fish from Kent Lake and Woodland Lake.

    August

    • August 8 - EGLE's WRD approved IPP PFAS Initiative reports submitted by the City of Brighton through July 1, 2019 and acknowledged that to date no sources of PFOS had been found although WWTP effluent was 16.1 ppt (estimated maximum possible concentration) on May 15, 2019.  EGLE's WRD required quarterly WWTP effluent monitoring for PFAS as well as reporting and source investigation.    
    • August 15 - Willow Run Airport submitted their short-term stormwater characterization study plan. EGLE issued a letter requesting revisions to the plan on August 28, 2019 and a revised plan was submitted on August 30, 2019.
    • August 19 - EGLE received results for fish samples collected on July 16, 2019 from Kent Lake.  
    • August 21 - The effluent from the Wixom WWTP was 36 ppt for PFOS.
    • August 21 - EGLE sampled unpermitted storm water and wastewater discharges from Quality Steel, as well as nearby waterways/wetlands (including the west branch of Norton Creek and a tributary to Kent Lake).  None of these results exceeded Rule 57 Water Quality Values for PFOS or PFOA.

    September

    • September 3-4 - EGLE's contractor AECOM sampled 6 groundwater monitoring wells (3 shallow and 3 deep) at two land applications sites that received biosolids from the Wixom WWTP. Soil and surface water were sampled at these two sites in April 2019. PFAS was detected in 2 of the 6 monitoring wells (both shallow), however all reported concentrations were below the Part 201 Groundwater Protection Criteria. 
    • September 10 (through October 8) - Sampling of 4 residential and 8 commercial properties by AECOM on behalf of EGLE. These results were ND, except for a detection of 10 ppt PFHxA at one business, as well as 2 ppt PFBS at one residence.
    • September 17 - The effluent from the Wixom WWTP was 33 ppt for PFOS.
    • September 19 - EGLE issued an approval for the Willow Run Airport PFAS sampling plan.
    • September 20 - Willow Run Airport conducted their first dry-weather sampling event. Highest result for PFOS was 43 ppt and PFOA was 6.9 ppt for outfalls that discharge to Willow Run Creek. Note, PFOS was 220 ppt from stormwater outfall 005 during this sampling event. This outfall discharges to the Rouge River Watershed.
    • September 26 - EGLE deployed Polar Organic Chemical Integrative Samplers (POCIS) at ten locations in Norton Creek, Willow Run and the Huron River to identify if there are intermittent sources of PFAS contamination in the watershed.
    • September 26 - EGLE collected fish from Ore Lake.
    • September 27 - EGLE collected surface water samples from Ore Lake, and Ore Creek.

    October

    • October 1 - The MDHHS issues final report, "PFAS Levels in Michigan Deer from the Huron River Area".  All muscle tissue samples were non-detect for PFAS and PCBs.  Ten of the liver samples and 6six of the kidney samples had very low levels of PFOS.
    • October 2 - The MDHHS and the MDNR issue press release regarding the report and provide notification that a consumption advisory for deer in this area was not necessary.
    • October 8 - The effluent from the Wixom WWTP was 17 ppt for PFOS. 
    • October 9 - EGLE received surface water sampling results from Ore Lake (2.6 ppt PFOS), Ore Creek at Riverside Drive (2.2-2.4 ppt PFOS), and Ore Creek at Hamburg Road (2.5 ppt PFOS).
    • October 10 - Willow Run Airport conducted their second dry-weather sampling event. Highest result for PFOS was 32 ppt and PFOA was 3.4 ppt for outfalls that discharge to Willow Run Creek. Note, PFOS was 170 ppt from stormwater outfall 005 during this sampling event. This outfall discharges to the Rouge River Watershed.
    • October 21 - Willow Run Airport attempted to conduct wet-weather sampling but not enough rain fell, therefore, this event represents a dry-weather sampling event and not all outfalls were sampled. Highest result for PFOS was 33 ppt and PFOA was 3.3 ppt for outfalls that discharge to Willow Run Creek. Note, PFOS was 240 ppt from stormwater outfall 005 during this sampling event. This outfall discharges to the Rouge River Watershed.
    • October 22 - EGLE received a draft report from the Daimler Chrysler Scio facility with results of the May 2019 approved work plan.  There are three source areas venting to Huron River above GSI criteria; one of those just above drinking water criteria (71 ppt PFOA + PFOS).
    • October 24 - EGLE retrieved Polar Organic Chemical Integrative Samplers (POCIS) from ten locations in Norton Creek, Willow Run, and the Huron River.
    • October 25 - Willow Run Airport conducted additional dry-weather sampling of two outfalls that discharge to Willow Run Creek. The highest result for PFOS was 3.5 ppt and PFOA was 4.4 ppt.
    • October 29 - EGLE received results for fish samples from Proud Lake (collected on April 25, 2019), Sandy Bottom Lake (collected on May 30, 2019), Woodland Lake (collected on July 16, 2019), Whitmore Lake (collected on May 1, 2019), and Bass Lake (collected on May 30, 2019).   
    • October 31 - Result received for resampling of Proud Lake campground well (see May 2019 update)-ND for all PFAS.  Previously had 11 ppt PFOA.

    three photos with egle staff standing in a river setting up a cage to catch fish

    November

    • November 5 -  The Daimler Chrysler Scio Facility becomes an official MPART site.
    • November 12 - The effluent from the Wixom WWTP was 28 ppt for PFOS.

    December

    • December 5 - Foam advisory signs were delivered to local health departments.
    • December 10 - The effluent from the Wixom WWTP was 26 ppt for PFOS.
    • December 9 - Willow Run Airport conducted wet-weather sampling for two outfalls, one of which discharges to Willow Run Creek. Result for PFOS was 58 ppt and PFOA was 5.3 ppt.
  • January

    • January 5 - The effluent from the Wixom WWTP was 32 ppt for PFOS.
    • January 21 - In response to foam complaints on Portage Lake, EGLE sampled Pittsfield Products which is authorized via a Groundwater Discharge Permit to discharge environmental remediation wastewater to groundwater of the State. The facility previously fabricated wire mesh filters for the automotive and small engine industries. Currently, the facility is not in operation and does not generate any waste streams other than treated groundwater.  Groundwater historically contaminated with volatile organic compounds (VOCs) is treated through two recovery well systems that pump groundwater through carbon adsorption vessels, which is then discharged to trenches. EGLE collected two influent samples and 2 effluent samples (one from each treatment system). The influent samples reported low-level detections for PFBA, PFPeA, PFBS, PFHxA, PFHpA, PFHxS, PFOA, and PFOS but results were below Part 201 Groundwater Cleanup Criteria. Both effluent samples were non-detect for all PFAS analyzed.

    February

    • February 2 - The effluent from the Wixom WWTP was 16 ppt for PFOS.
    • February 18 - EGLE collected fish from Fish Lake in Livingston County as part of citizen submitted Targeted Monitoring Request. Contaminant analysis results are pending and will be added to the Huron River Fish results table when available.
    • February 22 - Due to the sample results from the November 25, 2020 surface water sample event, EGLE issued a letter to Brose New Boston Inc. requiring the facility to collect a sample from the onsite stormwater pond in order to verify it is not a contributing source of PFOS to the Regan Drain.

    March

    • March 2 - The effluent from the Wixom WWTP was 11 ppt for PFOS.
    • March 12 - EGLE's contractor AECOM resampled 6 groundwater monitoring wells at two land application sites that received biosolids from the Wixom WWTP. The monitoring wells were originally sampled in September 2019. In March 2021, PFAS was detected in 3 of the 6 monitoring wells, including the two shallow wells which reported PFAS in 2019 and one deep well. One of the shallow wells reported a PFOA value of 16.4 ppt, which exceeds the Part 201 Groundwater Protection Criteria for PFOA of 8 ppt.

    April

    • April 5 - EGLE sent a letter providing notification to WWTPs in Michigan imposing additional sampling requirements for WWTPs that land apply biosolids after July 1, 2021.  The WWTPs are required to sample for PFAS prior to land application and inform landowners and farmers of the results. Depending on the results, WWTPs may be required to take additional actions if concentrations of PFOS are elevated or industrially impacted.  For more information about the Biosolids Interim Strategy for Land Application of Biosolids Containing PFAS, go to www.Michigan.gov/biosolids and click on "Michigan Biosolids PFAS-related information and links" under the "Information" section.
    • April 6 - The effluent from the Wixom WWTP was <47.7 ppt for PFOS.
    • April 16 - The City of Wixom issued a Notice of Violation to Tribar Plant 5 for discharging PFOS to the WWTP above the screening level set by the City of 12 ppt in November 2020. In response to the Notice of Violation, Tribar Plant 5 will install a Granular Activated Carbon (GAC) treatment system to treat its discharge for PFAS.
    • April 22 - The DNR collected fish from Ford Lake in Washtenaw County and Bellville Lake in Wayne County. Contaminant analysis results are pending and will be added to the Huron River Fish results table when available.

    May

    • May 4 - The effluent from the Wixom WWTP was 11 ppt for PFOS.
    • May 11 - EGLE collected fish from Kent Lake in Oakland County. Contaminant analysis results are pending and will be added to the Huron River Fish results table when available.
    • May 13 - EGLE collected fish from Washago Pond at the Willow Metropark in Wayne County.
    • May 16 - EGLE collected fish from Proud Lake in Oakland County. Contaminant analysis results are pending and will be added to the Huron River Fish results table when available.
    • May 19 - EGLE received a Pollution Emergency Allerting System (PEAS) report regarding a dam failure at the Washago Pond of the Regan Drain. EGLE decided to forego contaminant analyses on the Washago Pond fish collected on May 13th, 2021 due to the dam failure.
    • May 29 - EGLE collected fish from Bruin Lake at the Pinckney State Recreation Area in Washtenaw County. Contaminant analysis results are pending and will be added to the Huron River Fish results table when available.

    June

    • June 14 - EGLE issued a Violation Notice (VN-011827) to Brose New Boston Inc. in response to an exceedance of water quality values from sampling the facility conducted in March.  Brose will submit a Source Investigation and Identification Plan to EGLE for approval.
    • June 15 - The effluent from the Wixom WWTP was 15 ppt for PFOS.
    • June 17 - The City of Brighton submitted an IPP PFAS Status Report.  Investigations are ongoing, but no current sources of PFOS have been found.  Although inconclusive, some data indicate that legacy PFOS could be within the WWTP.
    • June 17 -- The City of Dexter submitted an IPP PFAS Status Report that said its one identified source of PFOS was continuing efforts to clean equipment to address historical use of a PFOS-containing product.  The Dexter WWTP effluent continues to meet water quality values for PFOS.

    July

    • Biosolids samples taken at Ann Arbor WWTP and Brighton WWTP under the Biosolids Interim Strategy for Land Application of Biosolids indicated no need for any biosolids application restrictions.
    • July 14 - EGLE approved a PFAS Source Investigation and Identification Plan for Brose New Boston Inc. to address the storm water discharge from the facility.  The completion date for the study is January 14th, 2022.
    • July 27 - EGLE collected fish from the Huron River within the City of Rockwood in Wayne County. Contaminant analysis results are pending and will be added to the Huron River Fish results table when available.

    August

    •  August 8 - The City of Ann Arbor submitted an IPP PFAS Status Report.  The City landfill leachate accepted by the WWTP was retested and was still below water quality values for PFOS and PFOA. An industrial user's effluent was retested in 2020 also was below water quality values.  City WWTP effluent has been below water quality values for PFOS since August 2019.

    September

    • September 16 - Tribar Plant 5 installed Granular Activated Carbon vessels to address PFAS in their discharge.  Future monitoring sampling will quantify new concentrations at the facility and inform EGLE and Tribar about steps moving forward.
  • January

    • January 5 - The effluent from the Wixom WWTP was 32 ppt for PFOS.
    • January 21 - In response to foam complaints on Portage Lake, EGLE sampled Pittsfield Products which is authorized via a Groundwater Discharge Permit to discharge environmental remediation wastewater to groundwater of the State. The facility previously fabricated wire mesh filters for the automotive and small engine industries. Currently, the facility is not in operation and does not generate any waste streams other than treated groundwater.  Groundwater historically contaminated with volatile organic compounds (VOCs) is treated through two recovery well systems that pump groundwater through carbon adsorption vessels, which is then discharged to trenches. EGLE collected two influent samples and 2 effluent samples (one from each treatment system). The influent samples reported low-level detections for PFBA, PFPeA, PFBS, PFHxA, PFHpA, PFHxS, PFOA, and PFOS but results were below Part 201 Groundwater Cleanup Criteria. Both effluent samples were non-detect for all PFAS analyzed.

    February

    • February 2 - The effluent from the Wixom WWTP was 16 ppt for PFOS.
    • February 18 - EGLE collected fish from Fish Lake in Livingston County as part of citizen submitted Targeted Monitoring Request. Contaminant analysis results are pending and will be added to the Huron River Fish results table when available.
    • February 22 - Due to the sample results from the November 25, 2020 surface water sample event, EGLE issued a letter to Brose New Boston Inc. requiring the facility to collect a sample from the onsite stormwater pond in order to verify it is not a contributing source of PFOS to the Regan Drain.

    March

    • March 2 - The effluent from the Wixom WWTP was 11 ppt for PFOS.
    • March 12 - EGLE's contractor AECOM resampled 6 groundwater monitoring wells at two land application sites that received biosolids from the Wixom WWTP. The monitoring wells were originally sampled in September 2019. In March 2021, PFAS was detected in 3 of the 6 monitoring wells, including the two shallow wells which reported PFAS in 2019 and one deep well. One of the shallow wells reported a PFOA value of 16.4 ppt, which exceeds the Part 201 Groundwater Protection Criteria for PFOA of 8 ppt.

    April

    • April 5 - EGLE sent a letter providing notification to WWTPs in Michigan imposing additional sampling requirements for WWTPs that land apply biosolids after July 1, 2021.  The WWTPs are required to sample for PFAS prior to land application and inform landowners and farmers of the results. Depending on the results, WWTPs may be required to take additional actions if concentrations of PFOS are elevated or industrially impacted.  For more information about the Biosolids Interim Strategy for Land Application of Biosolids Containing PFAS, go to www.Michigan.gov/biosolids and click on "Michigan Biosolids PFAS-related information and links" under the "Information" section.
    • April 6 - The effluent from the Wixom WWTP was <47.7 ppt for PFOS.
    • April 16 - The City of Wixom issued a Notice of Violation to Tribar Plant 5 for discharging PFOS to the WWTP above the screening level set by the City of 12 ppt in November 2020. In response to the Notice of Violation, Tribar Plant 5 will install a Granular Activated Carbon (GAC) treatment system to treat its discharge for PFAS.
    • April 22 - The DNR collected fish from Ford Lake in Washtenaw County and Bellville Lake in Wayne County. Contaminant analysis results are pending and will be added to the Huron River Fish results table when available.

    May

    • May 4 - The effluent from the Wixom WWTP was 11 ppt for PFOS.
    • May 11 - EGLE collected fish from Kent Lake in Oakland County. Contaminant analysis results are pending and will be added to the Huron River Fish results table when available.
    • May 13 - EGLE collected fish from Washago Pond at the Willow Metropark in Wayne County.
    • May 16 - EGLE collected fish from Proud Lake in Oakland County. Contaminant analysis results are pending and will be added to the Huron River Fish results table when available.
    • May 19 - EGLE received a Pollution Emergency Allerting System (PEAS) report regarding a dam failure at the Washago Pond of the Regan Drain. EGLE decided to forego contaminant analyses on the Washago Pond fish collected on May 13th, 2021 due to the dam failure.
    • May 29 - EGLE collected fish from Bruin Lake at the Pinckney State Recreation Area in Washtenaw County. Contaminant analysis results are pending and will be added to the Huron River Fish results table when available.

    June

    • June 14 - EGLE issued a Violation Notice (VN-011827) to Brose New Boston Inc. in response to an exceedance of water quality values from sampling the facility conducted in March.  Brose will submit a Source Investigation and Identification Plan to EGLE for approval.
    • June 15 - The effluent from the Wixom WWTP was 15 ppt for PFOS.
    • June 17 - The City of Brighton submitted an IPP PFAS Status Report.  Investigations are ongoing, but no current sources of PFOS have been found.  Although inconclusive, some data indicate that legacy PFOS could be within the WWTP.
    • June 17 -- The City of Dexter submitted an IPP PFAS Status Report that said its one identified source of PFOS was continuing efforts to clean equipment to address historical use of a PFOS-containing product.  The Dexter WWTP effluent continues to meet water quality values for PFOS.

    July

    • Biosolids samples taken at Ann Arbor WWTP and Brighton WWTP under the Biosolids Interim Strategy for Land Application of Biosolids indicated no need for any biosolids application restrictions.
    • July 6 - The effluent from the Wixon WWTP was 9.4 ppt for PFOS.
    • July 14 - EGLE approved a PFAS Source Investigation and Identification Plan for Brose New Boston Inc. to address the storm water discharge from the facility.  The completion date for the study is January 14th, 2022.
    • July 27 - EGLE collected fish from the Huron River within the City of Rockwood in Wayne County. Contaminant analysis results are pending and will be added to the Huron River Fish results table when available.

    August

    •  August 8 - The City of Ann Arbor submitted an IPP PFAS Status Report.  The City landfill leachate accepted by the WWTP was retested and was still below water quality values for PFOS and PFOA. An industrial user's effluent was retested in 2020 also was below water quality values.  City WWTP effluent has been below water quality values for PFOS since August 2019.
    • August 17 – The effluent from the Wixom WWTP was 13 ppt for PFOS.

    September

    • September 14 – The effluent from the Wixom WWTP was 11 ppt for PFOS.

    October

    • October 5 – The effluent from the Wixom WWTP was <100 ppt for PFOS.
    • October 28 – Tribar Plant 5 installed Granular Activated Carbon vessels to address PFAS in their discharge. Future monitoring sampling will quantify new concentrations at the facility and inform EGLE and Tribar about steps moving forward.

    November

    • November 2 – The effluent from the Wixom WWTP was 9.45 ppt for PFOS.
    • November 4 – The effluent from the Wixom WWTP was 8.1 ppt for PFOS.

    December

    • December 1 – The effluent from the Wixom WWTP was <27 ppt for PFOS.
  • January

    • January 4 – The effluent from the Wixom WWTP was 9.1 ppt for PFOS.

    February

    • February 1 – The effluent from the Wixom WWTP was <1.9 ppt for PFOS.