Initial Round (August 3, 2020 - February 3, 2021)

The initial compliance monitoring period ran from the date of MCL promulgation (August 3, 2020) until February 3, 2021, and included two groups of supplies:

  • Those supplies which had collected a sample during EGLE's statewide PFAS survey and returned a PFAS result with a detection greater than half of one of the proposed MCLs AND those supplies which had not previously collected a PFAS sample during EGLE's statewide PFAS survey, would sample during the first full quarter following promulgation (October 1, 2020 - December 31, 2020).
  • All remaining supplies which had collected a sample during EGLE's statewide PFAS survey would sample during the first six months following promulgation (August 3, 2020 - February 3, 2021).

Sample results collected for these supplies during the initial compliance monitoring period are listed in the table, below.

Understanding the Sample Results

*Results are provided in parts per trillion. A part per trillion (ppt) is the equivalent of 1 drop of water in 20 Olympic-size swimming pools

Definitions of the information provided in the sampling results tables:

  • WSSN: Water Supply Serial Number; unique identifier for each public water supply
  • Collection Date: The date samples were taken at the water supply.
  • The System Type column lists the type of public water supply
    • CWS: Community Water Supply (Type I)
    • NCWS: Noncommunity Water Supply (Type II)
      • NonTransient: Non-transient noncommunity water supplies (Type II) are monitored for compliance under Michigan's SDWA.
  • PFAS analytes are listed in individual columns (ppt). These include the 18 PFAS compounds tested under EPA method 537.1. If the result listed is "ND" the lab did not detect, or find, that PFAS was in the water sample above the method reporting limit.
    • HFPO-DA (Hexafluoropropylene oxide-dimer acid, also referred to as "GenX") is a regulated analyte in Michigan with with an MCL = 370 ppt
    • PFBS (Perfluobutane sulfonic acid) is a regulated analyte in Michigan with with an MCL = 420 ppt
    • PFHxA (perfluorohexanoic acid) is a regulated analyte in Michigan with with an MCL = 400,000 ppt
    • PFHxS (perfluorohexane sulfonic acid) is a regulated analyte in Michigan with with an MCL = 51 ppt
    • PFNA (perfluorononanoic acid) is a regulated analyte in Michigan with an MCL = 6 ppt
    • PFOA (perfluorooctanoic acid) is a regulated analyte in Michigan with with an MCL = 8 ppt
    • PFOS (perfluorooctane sulfonic acid) is a regulated analyte in Michigan with with an MCL = 16 ppt
    • 11Cl-PF3OUdS (11-chloroeicosafluoro-3-oxaundecane-1-sulfonic Acid) is currently a non-regulated analyte in Michigan
    • 9Cl-PF3ONS (9-chlorohexadecafluoro-3-oxanone-1-sulfonic acid) is currently a non-regulated analyte in Michigan
    • ADONA (4,8-dioxa-3H-perfluorononanoic acid) is currently a non-regulated analyte in Michigan
    • NEtFOSAA (2-(N-ethylperfluorooctanesulfonamido) acetic acid) is currently a non-regulated analyte in Michigan
    • NMeFOSAA (2-(N-methylperfluorooctanesulfonamido) acetic acid) is currently a non-regulated analyte in Michigan
    • PFDA (perfluorodecanoic acid) is currently a non-regulated analyte in Michigan
    • PFDoA (perfluorododecanoic acid) is currently a non-regulated analyte in Michigan
    • PFHpA (perfluoroheptanoic acid) is currently a non-regulated analyte in Michigan
    • PFTA (perfluorotetradecanoic acid) is currently a non-regulated analyte in Michigan
    • PFTrDA (perfluorotridecanoic acid) is currently a non-regulated analyte in Michigan
    • PFUnA (perfluoroundecanoic acid) is currently a non-regulated analyte in Michigan
  • Sample Number: The identification number that corresponds to the sample taken.
  • Lab Name: Laboratory providing PFAS analysis via EPA method 537.1.
  • na: not applicable

Again, the table below shows testing results from the initial compliance monitoring period (August 3, 2020 - February 3, 2021) for those public water supplies required to sample under Michigan's SDWA. Additional results from this testing period will be added as they become available.

Download the Dataset

The Compliance Monitoring Initial Round dataset is available for download on the data.Michigan.gov open data portal. 

Use the interactive table below to find the supply you're looking for. You can use the search box to find certain keywords, city or county names, or even supply type. Each column in the table is able to be sorted -- simply click or tap on the column header to sort it alphabetically or reverse-alphabetically. To see the complete set of results for a supply, click or tap the + symbol to expand; then the - symbol to collapse.
 
 
 
 

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View the Compliance Monitoring Initial Round dataset as a webpage.