Quarter 2
(April 1 - June 30, 2021)

The second quarter for PFAS MCL compliance monitoring ran from April 1 - June 30, 2021, and included two groups of supplies:

  • Those supplies whose initial round monitoring returned a PFAS detection(s) for one of the analytes with an MCLs, placing them onto a quarterly monitoring schedule.
  • A number of those supplies which have demonstrated through sampling PFAS levels consistently and reliably below the PFAS MCLs, who are on an annual monitoring schedule. (Who opted to collect their annual sample during Quarter 1)

Sample results collected for these supplies during Quarter 2 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 those testing results from Quarter 2 (April 1 - June 30, 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 Quarter 2 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.
 
 
 
 

Not seeing an interactive table?
View the Compliance Monitoring Quarter 2 dataset as a webpage.