Know Your Environment. Protect Your Health.

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

San Antonio Water Company

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.

 

16

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
2019ND90ND
2020ND30ND
2021N/A00N/A
2022ND10ND
2023ND30ND

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
2019-06-11CA3610085_003_003-201906110854ND
2019-06-11CA3610085_004_004-201906110836ND
2019-06-11CA3610085_011_011-201906110842ND
2019-09-03CA3610085_003_003-201909030939ND
2019-09-03CA3610085_004_004-201909030946ND
2019-09-03CA3610085_011_011-201909030950ND
2019-12-11CA3610085_003_003-201912111030ND
2019-12-11CA3610085_011_011-201912111037ND
2019-12-11CA3610085_004_004-201912111040ND
2020-03-03CA3610085_004_004-202003030950ND
2020-03-03CA3610085_003_003-202003031000ND
2020-03-03CA3610085_011_011-202003031020ND
2022-11-29CA3610085_021_021-202211290922ND
2023-04-20CA3610085_021_021-202304201200ND
2023-07-11CA3610085_021_021-202307111200ND
2023-10-17CA3610085_021_021-202310171045ND