Know Your Environment. Protect Your Health.

Perfluorooctane sulfonate (PFOS)

Hartford

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.

 

19

Samples

0

Samples exceeding legal limit (MCL)

10

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND10ND
2019ND30ND
2020ND10ND
20211.10 ppt42ND - 2.20 ppt
20221.73 ppt86ND - 2.60 ppt
20232.20 ppt222.20 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 Lab ID Result
2018-08-07GWEF1808071500GGAND
2019-05-14GWNT1905141400GGAND
2019-05-14GWNT1905141410GGAND
2019-05-14GWNT1905141420GGAND
2020-12-0920120861 PFAS TP456ND
2021-07-122.20 ppt
2021-07-1221G0381-042.20 ppt
2021-10-04ND
2021-10-0421J0074ND
2022-01-242201B11-012.60 ppt
2022-01-242.60 ppt
2022-04-182204C94-012.00 ppt
2022-04-182.00 ppt
2022-07-2522G0993-02 PFASND
2022-07-25ND
2022-10-052210499-012.30 ppt
2022-10-052.30 ppt
2023-01-092.20 ppt
2023-01-0923A0325-012.20 ppt