Know Your Environment. Protect Your Health.

4:2 Fluorotelomer sulfonate (4:2 FTS)

Twin Creeks Special Service 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.

 

39

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
2021ND20ND
20220.0190 ppt211ND - 0.390 ppt
2023ND160ND

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 Result
2021-07-20ND
2021-07-20ND
2022-05-11ND
2022-05-110.390 ppt
2022-05-11ND
2022-05-11ND
2022-06-13ND
2022-06-13ND
2022-07-21ND
2022-07-21ND
2022-08-30ND
2022-08-30ND
2022-09-28ND
2022-09-28ND
2022-10-25ND
2022-10-25ND
2022-10-25ND
2022-11-28ND
2022-11-28ND
2022-12-15ND
2022-12-15ND
2022-12-15ND
2022-12-15ND
2023-01-12ND
2023-01-12ND
2023-02-08ND
2023-02-08ND
2023-03-06ND
2023-03-06ND
2023-04-24ND
2023-04-24ND
2023-05-22ND
2023-05-22ND
2023-06-06ND
2023-06-06ND
2023-07-12ND
2023-07-12ND
2023-07-12ND
2023-07-12ND