Know Your Environment. Protect Your Health.

11-chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (11Cl-PF3OUdS)

Twin Creeks Special Service District

11-chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (11Cl-PF3OUdS) is a member of a group of perfluorinated chemicals used in many consumer products. 11Cl-PF3OUdS 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.

 

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
2022ND210ND
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 11Cl-PF3OUdS 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
2021-07-20ND
2021-07-20ND
2022-05-11ND
2022-05-11ND
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