Know Your Environment. Protect Your Health.

Perfluorooctane sulfonate (PFOS)

Ayer Road Properties LLC

Perfluorooctane sulfonate (PFOS) is a member of a group of perfluorinated chemicals used in many consumer products. PFOS and other perfluorinated chemicals can cause serious health effects, including cancer, endocrine disruption, accelerated puberty, liver and immune system damage, and thyroid changes. These chemicals are persistent in the environment and they accumulate in people. Click here to read more about perfluorinated chemicals.

 

61

Samples

0

Samples exceeding legal limit (MCL)

39

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND10ND
20191.44 ppt32ND - 2.17 ppt
20200.869 ppt74ND - 1.80 ppt
20210.890 ppt2015ND - 2.48 ppt
20221.59 ppt159ND - 4.35 ppt
20230.910 ppt159ND - 1.98 ppt

ppt = parts per trillion

State, National, and Health Guidelines for Drinking Water

EWG Health Guideline: 0.3 ppt

The EWG Health Guideline of 0.3 ppt for PFOS was defined by EPA's final toxicity value from the Office of Water’s Final Human Health Toxicity Assessment. This health guideline protects againat cardiovascular harm and harm to fetal growth.

EPA Maximum Contaminant
Level (MCL): 4 ppt

ppt = parts per trillion

All test results

Date Result
2018-08-22ND
2019-05-032.16 ppt
2019-05-03ND
2019-05-302.17 ppt
2020-01-02ND
2020-05-051.38 ppt
2020-05-05ND
2020-05-051.68 ppt
2020-05-051.80 ppt
2020-05-05ND
2020-05-051.22 ppt
2021-01-120.596 ppt
2021-01-121.36 ppt
2021-01-12ND
2021-04-25ND
2021-04-251.40 ppt
2021-04-251.08 ppt
2021-04-250.499 ppt
2021-04-251.08 ppt
2021-04-251.40 ppt
2021-04-251.14 ppt
2021-04-250.499 ppt
2021-04-251.14 ppt
2021-04-251.40 ppt
2021-04-251.40 ppt
2021-07-26ND
2021-07-261.63 ppt
2021-07-26ND
2021-10-252.48 ppt
2021-10-250.694 ppt
2021-10-25ND
2022-01-302.58 ppt
2022-01-30ND
2022-01-301.02 ppt
2022-04-103.11 ppt
2022-04-103.00 ppt
2022-04-10ND
2022-04-10ND
2022-04-134.35 ppt
2022-04-133.16 ppt
2022-07-11ND
2022-07-113.34 ppt
2022-07-111.73 ppt
2022-10-03ND
2022-10-031.51 ppt
2022-10-03ND
2023-01-161.51 ppt
2023-01-16ND
2023-01-16ND
2023-04-101.36 ppt
2023-04-101.92 ppt
2023-04-101.71 ppt
2023-04-101.98 ppt
2023-04-10ND
2023-04-101.74 ppt
2023-07-171.17 ppt
2023-07-17ND
2023-08-280.647 ppt
2023-10-091.62 ppt
2023-10-09ND
2023-11-15ND