Know Your Environment. Protect Your Health.

4:2 Fluorotelomer Sulfonic Acid (4:2 FTSA)

Lexington, Village of

4:2 Fluorotelomer Sulfonic Acid (4:2 FTSA) 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.

 

14

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND20ND
2019ND70ND
2020N/A00N/A
2021ND50ND
2022N/A00N/A
2023N/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 4:2 fluorotelomer sulfonic acid (4:2 FTSA) 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
2018-10-17SWIN1810171500GGAND
2018-10-17SWEF1810171530GGAND
2019-05-03SWIN1905031200GGAND
2019-05-03SWEF1905031205GGAND
2019-05-30SWIN1905301250GSCND
2019-06-26SWIN1906261240GSCND
2019-08-01SWIN1908011610MKND
2019-08-28SWIN1908291000GSCND
2019-09-26SWIN1909260900GSCND
2021-01-26SWIN2101261500RGND
2021-03-10SWMP2103101210SKND
2021-05-13SWIN2105131115GSCND
2021-07-15SWIN2107151200GGAND
2021-09-16SWIN2109161130GGAND