Know Your Environment. Protect Your Health.

Perfluorooctane sulfonate (PFOS)

Harris County Municipal Utility District 23

NOTE: Harris County Municipal Utility District 23 purchases water from City of Houston which is required to test for perfluorooctane sulfonate (pfos). Sample information shown below was taken by City of Houston.

Perfluorooctane sulfonate (PFOS) is a member of a group of perfluorinated chemicals used in many consumer products. PFOS 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.

 

94

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
2014N/A00N/A
2015N/A00N/A
2016N/A00N/A
2017N/A00N/A
2018N/A00N/A
2019N/A00N/A
2020N/A00N/A
2021N/A00N/A
2022N/A00N/A
2023ND930ND
2024ND30ND

ppt = parts per trillion

State, National, and Health Guidelines for Drinking Water

EWG Health Guideline: 0.3 ppt

The EWG Health Guideline of 0.3 ppt for PFOS was defined by EPA's final toxicity value from the Office of Water’s Final Human Health Toxicity Assessment. This health guideline protects againat cardiovascular harm and harm to fetal growth.

EPA Maximum Contaminant
Level (MCL): 4 ppt

ppt = parts per trillion

All test results

NOTE: Harris County Municipal Utility District 23 purchases water from City of Houston which is required to test for perfluorooctane sulfonate (pfos). Sample information shown below was taken by City of Houston.

Date Lab ID Result
2023-02-0623020605.01ND
2023-02-0623020605.03ND
2023-02-0623020605.04ND
2023-02-0623020605.07ND
2023-02-0623020605.05ND
2023-02-0623020605.02ND
2023-02-1323020605.14ND
2023-02-1323020605.19ND
2023-02-1323020605.13ND
2023-02-1323020605.15ND
2023-02-1323020605.16ND
2023-02-1323020605.12ND
2023-02-1323020605.18ND
2023-02-1323020605.08ND
2023-02-1323020605.10ND
2023-02-1323020605.17ND
2023-02-1323020605.09ND
2023-03-0623033252.06ND
2023-03-0623033252.04ND
2023-03-0623033252.03ND
2023-03-0623033252.07ND
2023-03-0623033252.01ND
2023-03-0623033252.05ND
2023-03-0623033252.08ND
2023-03-0623033252.11ND
2023-03-0623033252.09ND
2023-03-0823033252.10ND
2023-03-1323033253.01ND
2023-03-1323033253.05ND
2023-03-1323033253.10ND
2023-03-1323033253.02ND
2023-03-1323033253.06ND
2023-03-1323033253.11ND
2023-03-1323033253.08ND
2023-03-1323033253.03ND
2023-03-1323033253.12ND
2023-03-1523033253.09ND
2023-05-0123053252.17ND
2023-05-0123053252.01ND
2023-05-0123053252.07ND
2023-05-0123053252.15ND
2023-05-0123053252.13ND
2023-05-0123053252.03ND
2023-05-0123053252.05ND
2023-05-0123053252.11ND
2023-05-0123053252.09ND
2023-08-0323080307.15ND
2023-08-0323080307.23ND
2023-08-0323080307.03ND
2023-08-0323080307.19ND
2023-08-0323080307.05ND
2023-08-0323080307.01ND
2023-08-0323080307.07ND
2023-08-0323080307.13ND
2023-08-0323080307.11ND
2023-08-0323080307.21ND
2023-08-0323080307.17ND
2023-08-0323080307.09ND
2023-08-0923083256.17ND
2023-08-0923083256.09ND
2023-08-0923083256.15ND
2023-08-0923083256.07ND
2023-08-0923083256.11ND
2023-08-0923083256.19ND
2023-08-0923083256.21ND
2023-08-0923083256.03ND
2023-08-0923083256.25ND
2023-08-0923083256.01ND
2023-08-0923083256.05ND
2023-08-0923083256.23ND
2023-08-0923083256.13ND
2023-08-3123083263.25ND
2023-08-3123083263.09ND
2023-08-3123083263.03ND
2023-08-3123083263.19ND
2023-08-3123083263.01ND
2023-08-3123083263.17ND
2023-08-3123083263.15ND
2023-08-3123083263.13ND
2023-08-3123083263.11ND
2023-08-3123083263.05ND
2023-08-3123083263.23ND
2023-08-3123083263.21ND
2023-08-3123083263.07ND
2023-11-1423111408.07ND
2023-11-1423111408.11ND
2023-11-1423111408.17ND
2023-11-1423111408.15ND
2023-11-1423111408.03ND
2023-11-1423111408.13ND
2023-11-1423111408.05ND
2023-11-1423111408.01ND
2023-11-1423111408.09ND
2024-02-132402B16-001BND