Know Your Environment. Protect Your Health.

4:2 Fluorotelomer sulfonate (4:2 FTS)

Petersburgh Water District

4:2 Fluorotelomer sulfonate (4:2 FTS) is a member of a class of chemicals called per- and polyfluoroalkyl substances or PFAS. These chemicals were used in the production of non-stick, stain repellent and chemically inert coatings. Click here to read more about perfluorinated chemicals.

 

13

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
2020N/A00N/A
2021N/A00N/A
2022ND50ND
2023ND80ND

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 4:2 fluorotelomer sulfonate (4:2 FTS) was defined by EWG 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 Lab ID Result
2022-03-25410-77921-1ND
2022-07-29PB0489072922-POSTND
2022-08-26410-96106-2ND
2022-11-15410-106314-3ND
2022-12-22410-110493-5ND
2023-03-30PB048903323 PRE513ND
2023-04-27PB0489042723 PRE 513ND
2023-04-27PB0489033023 MID514ND
2023-04-27PB0489042723 MID514ND
2023-05-19PB0489051923-PREND
2023-05-19PB0489051923-MIDND
2023-06-07PB0489060723-PREND
2023-06-07PB0489060723-MIDND