Know Your Environment. Protect Your Health.

Perfluorooctane sulfonate (PFOS)

SNO PUD 1 - Lake Stevens

NOTE: SNO PUD 1 - Lake Stevens purchases water from City of Everett Public Works Department which is required to test for perfluorooctane sulfonate (pfos). Sample information shown below was taken by City of Everett Public Works Department.

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.

 

8

Samples

0

Samples exceeding legal limit (MCL)

0

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
2022N/A00N/A
2023ND20ND
2024ND40ND

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

NOTE: SNO PUD 1 - Lake Stevens purchases water from City of Everett Public Works Department which is required to test for perfluorooctane sulfonate (pfos). Sample information shown below was taken by City of Everett Public Works Department.

Date Lab ID Result
2023-02-234569021ND
2023-02-234569020ND
2023-05-164569019ND
2023-05-164569022ND
2023-08-154569023ND
2023-08-154569017ND
2023-11-074569024ND
2023-11-074569018ND