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Community PFAS Testing
Massachusetts Water Resources Authority
WINCHESTER
You might have seen recent news reports about per-and polyfluoroalkyl substances (together abbreviated as PFAS). This is a class of human-made chemicals typically associated with certain fire-fighting foams. These chemicals are persistent in the environment and have been used in products we all use for decades.
On October 2, 2020, MassDEP published the drinking water standard or maximum contaminant level (MCL) of 20 nanograms per liter (ng/L), or parts per trillion (ppt), for PFAS based on the sum of concentrations for six PFAS compounds. The six PFAS are: perfluorooctane sulfonic acid (PFOS); perfluorooctanoic acid (PFOA); perfluorohexane sulfonic acid (PFHxS); perfluorononanoic acid (PFNA); perfluoroheptanoic acid (PFHpA); and perfluorodecanoic acid (PFDA).
2023 PFAS Test Results for Winchester
| PFAS Analyte (results in ppt) |
Treatment Plant - 10/2023 |
| PFAS6 (regulated) |
| Perfluorohexanesulfonic acid (PFHxS) |
Not Detected |
| Perfluoroheptanoic acid (PFHpA) |
Trace* |
| Perfluorooctanoic acid (PFOA) |
Trace* |
| Perfluorooctanesulfonic acid (PFOS) |
Not Detected |
| Perfluorononanoic acid (PFNA) |
Not Detected |
| Perfluorodecanoic acid (PFDA) |
Not Detected |
| Sum of PFAS6 - compare to MassDEP MCL of 20 ppt |
0 ppt |
* Trace amounts are present but they are below the minimum concentration that can be reported as a quantified value. Categorized as not detected by MassDEP.
MCL = Maximum Contaminant Level, highest level allowed
PFAS6 (Regulated) are regulated by the state of Massachusetts
PFAS (Unregulated)
are not regulated by the state of Massachusetts |
| Unregulated PFAS |
| PFBS |
Not Detected |
| PFHxA |
Trace |
| NEtFOSAA |
Not Detected |
| NMeFOSAA |
Not Detected |
| PFDoA |
Not Detected |
| PFTeDA |
Not Detected |
| PFTrDA |
Not Detected |
| PFUnA |
Not Detected |
| 11Cl-PF3OUdS |
Not Detected |
| 9C1-PF3ONS |
Not Detected |
| Adona |
Not Detected |
| HFPO-DA |
Not Detected |
| PFAS Analyte (results in ppt) |
Treatment Plant - 7/2023 |
| PFAS6 (regulated) |
| Perfluorohexanesulfonic acid (PFHxS) |
Not Detected |
| Perfluoroheptanoic acid (PFHpA) |
Trace* |
| Perfluorooctanoic acid (PFOA) |
Trace* |
| Perfluorooctanesulfonic acid (PFOS) |
Trace* |
| Perfluorononanoic acid (PFNA) |
Not Detected |
| Perfluorodecanoic acid (PFDA) |
Not Detected |
| Sum of PFAS6 - compare to MassDEP MCL of 20 ppt |
0 ppt |
* Trace amounts are present but they are below the minimum concentration that can be reported as a quantified value. Categorized as not detected by MassDEP.
MCL = Maximum Contaminant Level, highest level allowed
PFAS6 (Regulated) are regulated by the state of Massachusetts
PFAS (Unregulated)
are not regulated by the state of Massachusetts |
| Unregulated PFAS |
| PFBS |
Not Detected |
| PFHxA |
Not Detected |
| NEtFOSAA |
Not Detected |
| NMeFOSAA |
Not Detected |
| PFDoA |
Not Detected |
| PFTeDA |
Not Detected |
| PFTrDA |
Not Detected |
| PFUnA |
Not Detected |
| 11Cl-PF3OUdS |
Not Detected |
| 9C1-PF3ONS |
Not Detected |
| Adona |
Not Detected |
| HFPO-DA |
Not Detected |
| PFAS Analyte (results in ppt) |
Treatment Plant - 4/2023 |
| PFAS6 (regulated) |
| Perfluorohexanesulfonic acid (PFHxS) |
Not Detected |
| Perfluoroheptanoic acid (PFHpA) |
Trace* |
| Perfluorooctanoic acid (PFOA) |
Trace* |
| Perfluorooctanesulfonic acid (PFOS) |
Trace* |
| Perfluorononanoic acid (PFNA) |
Not Detected |
| Perfluorodecanoic acid (PFDA) |
Not Detected |
| Sum of PFAS6 - compare to MassDEP MCL of 20 ppt |
0 ppt |
* Trace amounts are present but they are below the minimum concentration that can be reported as a quantified value. Categorized as not detected by MassDEP.
MCL = Maximum Contaminant Level, highest level allowed
PFAS6 (Regulated) are regulated by the state of Massachusetts
PFAS (Unregulated)
are not regulated by the state of Massachusetts |
| Unregulated PFAS |
| PFBS |
Not Detected |
| PFHxA |
Not Detected |
| NEtFOSAA |
Not Detected |
| NMeFOSAA |
Not Detected |
| PFDoA |
Not Detected |
| PFTeDA |
Not Detected |
| PFTrDA |
Not Detected |
| PFUnA |
Not Detected |
| 11Cl-PF3OUdS |
Not Detected |
| 9C1-PF3ONS |
Not Detected |
| Adona |
Not Detected |
| HFPO-DA |
Not Detected |
| PFAS Analyte (results in ppt) |
Treatment Plant - 1/2023 |
| PFAS6 (regulated) |
| Perfluorohexanesulfonic acid (PFHxS) |
Not Detected |
| Perfluoroheptanoic acid (PFHpA) |
Trace* |
| Perfluorooctanoic acid (PFOA) |
Trace* |
| Perfluorooctanesulfonic acid (PFOS) |
Trace* |
| Perfluorononanoic acid (PFNA) |
Not Detected |
| Perfluorodecanoic acid (PFDA) |
Not Detected |
| Sum of PFAS6 - compare to MassDEP MCL of 20 ppt |
0 ppt |
* Trace amounts are present but they are below the minimum concentration that can be reported as a quantified value. Categorized as not detected by MassDEP.
MCL = Maximum Contaminant Level, highest level allowed
PFAS6 (Regulated) are regulated by the state of Massachusetts
PFAS (Unregulated)
are not regulated by the state of Massachusetts |
| Unregulated PFAS |
| PFBS |
Not Detected |
| PFHxA |
Trace* |
| NEtFOSAA |
Not Detected |
| NMeFOSAA |
Not Detected |
| PFDoA |
Not Detected |
| PFTeDA |
Not Detected |
| PFTrDA |
Not Detected |
| PFUnA |
Not Detected |
| 11Cl-PF3OUdS |
Not Detected |
| 9C1-PF3ONS |
Not Detected |
| Adona |
Not Detected |
| HFPO-DA |
Not Detected |
2022 PFAS Test Results for Winchester
| PFAS Analyte (results in ppt) |
Treatment Plant - 11/2022 |
| PFAS6 (regulated) |
| Perfluorohexanesulfonic acid (PFHxS) |
Not Detected |
| Perfluoroheptanoic acid (PFHpA) |
Trace* |
| Perfluorooctanoic acid (PFOA) |
Trace* |
| Perfluorooctanesulfonic acid (PFOS) |
Trace* |
| Perfluorononanoic acid (PFNA) |
Not Detected |
| Perfluorodecanoic acid (PFDA) |
Not Detected |
| Sum of PFAS6 - compare to MassDEP MCL of 20 ppt |
Not Detected |
* Trace amounts are present but they are below the minimum concentration that can be reported as a quantified value. Categorized as not detected by MassDEP.
MCL = Maximum Contaminant Level, highest level allowed
PFAS6 (Regulated) are regulated by the state of Massachusetts
PFAS (Unregulated)
are not regulated by the state of Massachusetts |
| Unregulated PFAS |
| PFBS |
Not Detected |
| PFHxA |
Trace* |
| NEtFOSAA |
Not Detected |
| NMeFOSAA |
Not Detected |
| PFDoA |
Not Detected |
| PFTeDA |
Not Detected |
| PFTrDA |
Not Detected |
| PFUnA |
Not Detected |
| 11Cl-PF3OUdS |
Not Detected |
| 9C1-PF3ONS |
Not Detected |
| Adona |
Not Detected |
| HFPO-DA |
Not Detected |
| PFAS Analyte (results in ppt) |
Treatment Plant - 10/2022 |
| PFAS6 (regulated) |
| Perfluorohexanesulfonic acid (PFHxS) |
Not Detected |
| Perfluoroheptanoic acid (PFHpA) |
Trace* |
| Perfluorooctanoic acid (PFOA) |
Trace* |
| Perfluorooctanesulfonic acid (PFOS) |
Trace* |
| Perfluorononanoic acid (PFNA) |
Not Detected |
| Perfluorodecanoic acid (PFDA) |
Not Detected |
| Sum of PFAS6 - compare to MassDEP MCL of 20 ppt |
0 ppt |
* Trace amounts are present but they are below the minimum concentration that can be reported as a quantified value. Categorized as not detected by MassDEP.
MCL = Maximum Contaminant Level, highest level allowed
PFAS6 (Regulated) are regulated by the state of Massachusetts
PFAS (Unregulated)
are not regulated by the state of Massachusetts |
| Unregulated PFAS |
| PFBS |
Not Detected |
| PFHxA |
Trace* |
| NEtFOSAA |
Not Detected |
| NMeFOSAA |
Not Detected |
| PFDoA |
Not Detected |
| PFTeDA |
Not Detected |
| PFTrDA |
Not Detected |
| PFUnA |
Not Detected |
| 11Cl-PF3OUdS |
Not Detected |
| 9C1-PF3ONS |
Not Detected |
| Adona |
Not Detected |
| HFPO-DA |
Not Detected |
| PFAS Analyte (results in ppt) |
Treatment Plant - 7/2022 |
| PFAS6 (regulated) |
| Perfluorohexanesulfonic acid (PFHxS) |
Not Detected |
| Perfluoroheptanoic acid (PFHpA) |
Trace* |
| Perfluorooctanoic acid (PFOA) |
Trace* |
| Perfluorooctanesulfonic acid (PFOS) |
Trace* |
| Perfluorononanoic acid (PFNA) |
Not Detected |
| Perfluorodecanoic acid (PFDA) |
Not Detected |
| Sum of PFAS6 - compare to MassDEP MCL of 20 ppt |
Not Detected |
* Trace amounts are present but they are below the minimum concentration that can be reported as a quantified value. Categorized as not detected by MassDEP.
MCL = Maximum Contaminant Level, highest level allowed
PFAS6 (Regulated) are regulated by the state of Massachusetts
PFAS (Unregulated)
are not regulated by the state of Massachusetts |
| Unregulated PFAS |
| PFBS |
Not Detected |
| PFHxA |
Trace* |
| NEtFOSAA |
Not Detected |
| NMeFOSAA |
Not Detected |
| PFDoA |
Not Detected |
| PFTeDA |
Not Detected |
| PFTrDA |
Not Detected |
| PFUnA |
Not Detected |
| 11Cl-PF3OUdS |
Not Detected |
| 9C1-PF3ONS |
Not Detected |
| Adona |
Not Detected |
| HFPO-DA |
Not Detected |
| PFAS Analyte (results in ppt) |
Treatment Plant - 4/2022 |
| PFAS6 (regulated) |
| Perfluorohexanesulfonic acid (PFHxS) |
Not Detected |
| Perfluoroheptanoic acid (PFHpA) |
Trace* |
| Perfluorooctanoic acid (PFOA) |
Trace* |
| Perfluorooctanesulfonic acid (PFOS) |
Trace* |
| Perfluorononanoic acid (PFNA) |
Not Detected |
| Perfluorodecanoic acid (PFDA) |
Not Detected |
| Sum of PFAS6 - compare to MassDEP MCL of 20 ppt |
Not Detected |
* Trace amounts are present but they are below the minimum concentration that can be reported as a quantified value. Categorized as not detected by MassDEP.
MCL = Maximum Contaminant Level, highest level allowed
PFAS6 (Regulated) are regulated by the state of Massachusetts
PFAS (Unregulated)
are not regulated by the state of Massachusetts |
| Unregulated PFAS |
| PFBS |
Not Detected |
| PFHxA |
Trace* |
| NEtFOSAA |
Not Detected |
| NMeFOSAA |
Not Detected |
| PFDoA |
Not Detected |
| PFTeDA |
Not Detected |
| PFTrDA |
Not Detected |
| PFUnA |
Not Detected |
| 11Cl-PF3OUdS |
Not Detected |
| 9C1-PF3ONS |
Not Detected |
| Adona |
Not Detected |
| HFPO-DA |
Not Detected |
| PFAS Analyte (results in ppt) |
Treatment Plant - 1/2022 |
| PFAS6 (regulated) |
| Perfluorohexanesulfonic acid (PFHxS) |
Not Detected |
| Perfluoroheptanoic acid (PFHpA) |
Trace* |
| Perfluorooctanoic acid (PFOA) |
Trace* |
| Perfluorooctanesulfonic acid (PFOS) |
Trace* |
| Perfluorononanoic acid (PFNA) |
Not Detected |
| Perfluorodecanoic acid (PFDA) |
Not Detected |
| Sum of PFAS6 - compare to MassDEP MCL of 20 ppt |
0 ppt |
* Trace amounts are present but they are below the minimum concentration that can be reported as a quantified value. Categorized as not detected by MassDEP.
MCL = Maximum Contaminant Level, highest level allowed
PFAS6 (Regulated) are regulated by the state of Massachusetts
PFAS (Unregulated)
are not regulated by the state of Massachusetts |
| Unregulated PFAS |
| PFBS |
Not Detected |
| PFHxA |
Trace* |
| NEtFOSAA |
Not Detected |
| NMeFOSAA |
Not Detected |
| PFDoA |
Not Detected |
| PFTeDA |
Not Detected |
| PFTrDA |
Not Detected |
| PFUnA |
Not Detected |
| 11Cl-PF3OUdS |
Not Detected |
| 9C1-PF3ONS |
Not Detected |
| Adona |
Not Detected |
| HFPO-DA |
Not Detected |
2021 PFAS Test Results for Winchester
| PFAS Analyte (results in ppt) |
Treatment Plant - 10/2021 |
| PFAS6 (regulated) |
| Perfluorohexanesulfonic acid (PFHxS) |
Not Detected |
| Perfluoroheptanoic acid (PFHpA) |
Trace* |
| Perfluorooctanoic acid (PFOA) |
Trace* |
| Perfluorooctanesulfonic acid (PFOS) |
Trace* |
| Perfluorononanoic acid (PFNA) |
Not Detected |
| Perfluorodecanoic acid (PFDA) |
Not Detected |
| Sum of PFAS6 - compare to MassDEP MCL of 20 ng/l |
0 ng/l |
* Trace amounts are present but they are below the minimum concentration that can be reported as a quantified value. Categorized as not detected by MassDEP.
MCL = Maximum Contaminant Level, highest level allowed
PFAS6 (Regulated) are regulated by the state of Massachusetts
PFAS (Unregulated)
are not regulated by the state of Massachusetts |
| Unregulated PFAS |
| PFBS |
Not Detected |
| PFHxA |
Trace* |
| NEtFOSAA |
Not Detected |
| NMeFOSAA |
Not Detected |
| PFDoA |
Not Detected |
| PFTeDA |
Not Detected |
| PFTrDA |
Not Detected |
| PFUnA |
Not Detected |
| 11Cl-PF3OUdS |
Not Detected |
| 9C1-PF3ONS |
Not Detected |
| Adona |
Not Detected |
| HFPO-DA |
Not Detected |
| PFAS Analyte (results in ppt) |
Treatment Plant - 7/6/21 |
| PFAS6 (regulated) |
| Perfluorohexanesulfonic acid (PFHxS) |
Not Detected |
| Perfluoroheptanoic acid (PFHpA) |
Trace* |
| Perfluorooctanoic acid (PFOA) |
Trace* |
| Perfluorooctanesulfonic acid (PFOS) |
Not Detected |
| Perfluorononanoic acid (PFNA) |
Not Detected |
| Perfluorodecanoic acid (PFDA) |
Not Detected |
| Sum of PFAS6 - compare to MassDEP MCL of 20 ng/l |
0 ng/l |
* Trace amounts are present but they are below the minimum concentration that can be reported as a quantified value. Categorized as not detected by MassDEP.
MCL = Maximum Contaminant Level, highest level allowed
PFAS6 (Regulated) are regulated by the state of Massachusetts
PFAS (Unregulated)
are not regulated by the state of Massachusetts |
| Unregulated PFAS |
| PFBS |
Not Detected |
| PFHxA |
Not Detected |
| NEtFOSAA |
Not Detected |
| NMeFOSAA |
Not Detected |
| PFDoA |
Not Detected |
| PFTeDA |
Not Detected |
| PFTrDA |
Not Detected |
| PFUnA |
Not Detected |
| 11Cl-PF3OUdS |
Not Detected |
| 9C1-PF3ONS |
Not Detected |
| Adona |
Not Detected |
| HFPO-DA |
Not Detected |
| PFAS Analyte (results in ppt) |
Treatment Plant - 4/6/21 |
| Perfluorohexanesulfonic acid (PFHxS) |
Not Detected |
| Perfluoroheptanoic acid (PFHpA) |
Not Detected |
| Perfluorooctanoic acid (PFOA) |
Trace* |
| Perfluorooctanesulfonic acid (PFOS) |
Not Detected |
| Perfluorononanoic acid (PFNA) |
Not Detected |
| Perfluorodecanoic acid (PFDA) |
Not Detected |
| Sum of PFAS6 - compare to MassDEP MCL of 20 ng/l |
0 ng/l |
* Trace amounts are present but they are below the minimum concentration that can be reported as a quantified value. Categorized as not detected by MassDEP.
MCL = Maximum Contaminant Level, highest level allowed |
| |
| PFBS |
Not Detected |
| PFHxA |
Not Detected |
| NEtFOSAA |
Not Detected |
| NMeFOSAA |
Not Detected |
| PFDoA |
Not Detected |
| PFTeDA |
Not Detected |
| PFTrDA |
Not Detected |
| PFUnA |
Not Detected |
Information on MWRA PFAS Levels |
