Know Your Environment. Protect Your Health.

Perfluorooctane sulfonate (PFOS)

Firgrove Mutual Inc

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.

 

34

Samples

0

Samples exceeding legal limit (MCL)

10

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014N/A00N/A
2015N/A00N/A
2016N/A00N/A
2017N/A00N/A
2018N/A00N/A
2019N/A00N/A
2020N/A00N/A
2021N/A00N/A
20221.94 ppt199ND - 10.00 ppt
20230.614 ppt141ND - 8.60 ppt
2024ND10ND

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
2022-02-094255318ND
2022-02-0942552732.59 ppt
2022-02-0942553132.30 ppt
2022-02-0942553132.30 ppt
2022-02-094255311ND
2022-02-094255259ND
2022-02-094255322ND
2022-02-094255325ND
2022-02-0942552668.98 ppt
2022-02-094255323ND
2022-02-0942553032.06 ppt
2022-04-204279649ND
2022-07-144335587ND
2022-07-1443355912.50 ppt
2022-07-144335592ND
2022-07-14433559010.00 ppt
2022-07-144335587ND
2022-07-1443355892.60 ppt
2022-07-1443355883.60 ppt
2023-01-2345557498.60 ppt
2023-01-24380-35455-1ND
2023-01-24380-35455-2ND
2023-01-24380-35455-3ND
2023-01-25380-35583-3ND
2023-01-25380-35583-1ND
2023-01-25380-35583-2ND
2023-02-13380-37731-1ND
2023-04-17380-44157-1ND
2023-07-104549176ND
2023-07-104549175ND
2023-09-20380-63945-1ND
2023-09-20380-63943-1ND
2023-10-11380-66923-1ND
2024-01-30380-81075-1ND