Know Your Environment. Protect Your Health.

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

Halifax Water Department

NOTE: Halifax Water Department purchases water from Brockton Water Commission which is required to test for 11-chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (11cl-pf3ouds). Sample information shown below was taken by Brockton Water Commission.

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.

 

28

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
2020ND90ND
2021ND60ND
2022ND180ND
2023ND60ND
2024ND60ND

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

NOTE: Halifax Water Department purchases water from Brockton Water Commission which is required to test for 11-chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (11cl-pf3ouds). Sample information shown below was taken by Brockton Water Commission.

Date Result
2020-08-19ND
2020-08-19ND
2020-11-18ND
2020-11-18ND
2020-11-18ND
2020-11-18ND
2020-11-18ND
2020-11-18ND
2020-11-18ND
2021-01-12ND
2021-01-12ND
2021-04-13ND
2021-04-13ND
2021-04-13ND
2021-05-04ND
2021-05-04ND
2021-05-25ND
2021-05-25ND
2021-06-01ND
2021-06-01ND
2021-07-13ND
2022-10-05ND
2022-10-05ND
2023-03-07ND
2023-06-14ND
2023-09-13ND
2023-10-05ND
2023-12-06ND