Know Your Environment. Protect Your Health.

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

Hillview Water Company-oakhurst/sierra Lakes

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.

 

11

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
2020ND20ND
2021ND10ND
2022N/A00N/A
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 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 Lab ID Result
2020-11-04CA2010007_039_039-202011041540ND
2020-11-23CA2010007_039_039-202011231525ND
2021-02-17CA2010007_040_040-202102171121ND
2023-04-19102837PND
2023-04-19102839PND
2023-09-13108496RND
2023-09-13108506RND
2023-10-02108579PND
2023-10-02108580PND
2023-10-03108577PND
2023-10-03108578PND