Know Your Environment. Protect Your Health.

9-chlorohexadecafluoro-3-oxanone-1-sulfonic acid (9Cl-PF3ONS)

Topsfield Water Department

9-chlorohexadecafluoro-3-oxanone-1-sulfonic acid (9Cl-PF3ONS) is a member of a group of perfluorinated chemicals used in many consumer products. 9Cl-PF3ONS 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.

 

79

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018N/A00N/A
2019N/A00N/A
2020ND40ND
2021ND290ND
2022ND260ND
2023ND200ND

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 9Cl-PF3ONS 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
2020-02-19ND
2020-02-19ND
2020-07-17ND
2020-07-17ND
2021-01-22ND
2021-01-22ND
2021-01-29ND
2021-01-29ND
2021-01-29ND
2021-02-03ND
2021-02-03ND
2021-03-03ND
2021-03-03ND
2021-04-14ND
2021-04-14ND
2021-07-02ND
2021-07-02ND
2021-07-02ND
2021-08-06ND
2021-08-06ND
2021-08-06ND
2021-09-10ND
2021-09-10ND
2021-09-10ND
2021-10-29ND
2021-10-29ND
2021-10-29ND
2021-11-05ND
2021-11-05ND
2021-11-05ND
2021-12-03ND
2021-12-03ND
2021-12-03ND
2022-01-13ND
2022-01-13ND
2022-01-13ND
2022-01-13ND
2022-01-13ND
2022-02-17ND
2022-02-17ND
2022-02-17ND
2022-02-17ND
2022-02-17ND
2022-03-11ND
2022-03-11ND
2022-03-11ND
2022-04-14ND
2022-05-25ND
2022-06-09ND
2022-07-14ND
2022-07-14ND
2022-07-14ND
2022-08-11ND
2022-09-08ND
2022-10-13ND
2022-10-13ND
2022-10-13ND
2022-11-10ND
2022-12-08ND
2023-01-12ND
2023-01-12ND
2023-01-12ND
2023-02-09ND
2023-03-09ND
2023-04-13ND
2023-04-13ND
2023-04-13ND
2023-05-11ND
2023-06-08ND
2023-07-13ND
2023-07-13ND
2023-07-13ND
2023-08-10ND
2023-09-14ND
2023-10-11ND
2023-11-09ND
2023-11-09ND
2023-11-09ND
2023-12-14ND