Know Your Environment. Protect Your Health.

N-ethyl perfluorooctane sulfonamido acetic acid (N-EtFOSAA)

Ayer DPW Water Division

N-ethyl perfluorooctane sulfonamido acetic acid (N-EtFOSAA) is a member of a group of perfluorinated chemicals used in many consumer products. N-EtFOSAA 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.

 

223

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND40ND
2019ND90ND
2020ND280ND
20210.0370 ppt603ND - 0.924 ppt
2022ND480ND
20230.0210 ppt742ND - 0.822 ppt
2024N/A00N/A

ppt = parts per trillion

State, National, and Health Guidelines for Drinking Water

EWG Health Guideline: 1 ppt

The EWG Health Guideline of 1 ppt for N-EtFOSAA was defined by EWG as based on studies by Phillipe Grandjean of Harvard University and many other independent researchers who found reduced effectiveness of vaccines and adverse impacts on mammary gland development from exposure to PFOA and PFOS, the two PFAS most widely detected in drinking water.

ppt = parts per trillion

All test results

Date Result
2018-08-24ND
2018-08-24ND
2018-10-25ND
2018-10-25ND
2019-02-20ND
2019-02-20ND
2019-05-21ND
2019-08-20ND
2019-08-20ND
2019-11-11ND
2019-11-18ND
2019-12-10ND
2019-12-10ND
2020-02-13ND
2020-02-13ND
2020-02-13ND
2020-02-13ND
2020-02-13ND
2020-02-13ND
2020-02-13ND
2020-02-13ND
2020-02-13ND
2020-06-09ND
2020-06-09ND
2020-06-09ND
2020-06-09ND
2020-06-09ND
2020-06-09ND
2020-06-09ND
2020-06-09ND
2020-06-09ND
2020-09-02ND
2020-09-02ND
2020-09-02ND
2020-12-03ND
2020-12-03ND
2020-12-03ND
2020-12-03ND
2020-12-03ND
2020-12-03ND
2020-12-03ND
2021-01-08ND
2021-01-08ND
2021-01-08ND
2021-01-08ND
2021-01-08ND
2021-01-080.924 ppt
2021-01-08ND
2021-01-08ND
2021-01-08ND
2021-01-08ND
2021-01-08ND
2021-02-22ND
2021-02-22ND
2021-02-22ND
2021-02-220.572 ppt
2021-02-22ND
2021-03-24ND
2021-03-24ND
2021-03-24ND
2021-04-28ND
2021-04-28ND
2021-04-280.709 ppt
2021-05-18ND
2021-05-18ND
2021-05-18ND
2021-05-18ND
2021-06-09ND
2021-06-09ND
2021-06-09ND
2021-06-09ND
2021-06-10ND
2021-06-10ND
2021-06-10ND
2021-06-10ND
2021-06-10ND
2021-06-10ND
2021-07-21ND
2021-07-21ND
2021-07-21ND
2021-07-21ND
2021-08-19ND
2021-08-19ND
2021-08-19ND
2021-08-19ND
2021-08-19ND
2021-09-24ND
2021-09-24ND
2021-09-24ND
2021-10-14ND
2021-10-14ND
2021-10-14ND
2021-11-12ND
2021-11-12ND
2021-11-12ND
2021-12-02ND
2021-12-02ND
2021-12-02ND
2021-12-10ND
2021-12-10ND
2021-12-10ND
2022-01-04ND
2022-01-04ND
2022-01-04ND
2022-02-03ND
2022-02-03ND
2022-02-03ND
2022-02-24ND
2022-02-24ND
2022-02-24ND
2022-02-24ND
2022-03-07ND
2022-03-07ND
2022-03-07ND
2022-04-21ND
2022-04-21ND
2022-04-21ND
2022-04-25ND
2022-04-25ND
2022-05-13ND
2022-05-13ND
2022-05-13ND
2022-06-09ND
2022-06-09ND
2022-06-09ND
2022-07-20ND
2022-07-20ND
2022-07-20ND
2022-07-20ND
2022-08-11ND
2022-08-11ND
2022-08-11ND
2022-08-11ND
2022-09-08ND
2022-09-08ND
2022-09-08ND
2022-09-08ND
2022-10-12ND
2022-10-12ND
2022-10-12ND
2022-10-12ND
2022-11-07ND
2022-11-07ND
2022-11-07ND
2022-11-07ND
2022-12-01ND
2022-12-01ND
2022-12-01ND
2022-12-01ND
2023-01-05ND
2023-01-05ND
2023-01-05ND
2023-01-05ND
2023-02-01ND
2023-02-01ND
2023-02-01ND
2023-02-01ND
2023-03-03ND
2023-03-03ND
2023-03-20ND
2023-03-20ND
2023-03-20ND
2023-03-20ND
2023-03-200.729 ppt
2023-04-10ND
2023-04-10ND
2023-04-10ND
2023-04-10ND
2023-04-10ND
2023-04-10ND
2023-04-10ND
2023-04-100.822 ppt
2023-04-10ND
2023-04-10ND
2023-05-02ND
2023-05-02ND
2023-05-04ND
2023-05-04ND
2023-05-04ND
2023-05-04ND
2023-05-08ND
2023-05-08ND
2023-05-08ND
2023-06-06ND
2023-06-06ND
2023-06-06ND
2023-06-06ND
2023-07-14ND
2023-07-14ND
2023-07-14ND
2023-07-14ND
2023-08-07ND
2023-08-07ND
2023-08-08ND
2023-08-08ND
2023-08-08ND
2023-08-08ND
2023-09-13ND
2023-09-13ND
2023-09-13ND
2023-09-13ND
2023-09-13ND
2023-09-13ND
2023-09-13ND
2023-09-13ND
2023-09-13ND
2023-09-13ND
2023-09-13ND
2023-09-13ND
2023-10-04ND
2023-10-04ND
2023-10-04ND
2023-10-04ND
2023-11-07ND
2023-11-07ND
2023-11-20ND
2023-11-20ND
2023-11-20ND
2023-11-20ND
2023-12-08ND
2023-12-08ND
2023-12-08ND
2023-12-08ND