Know Your Environment. Protect Your Health.

Perfluorononanoic acid (PFNA)

Harris County Municipal Utility District 158

NOTE: Harris County Municipal Utility District 158 purchases water from City of Houston which is required to test for perfluorononanoic acid (pfna). Sample information shown below was taken by City of Houston.

Perfluorononanoic acid, otherwise known as PFNA or C9, is a PFC similar in function and use to PFOA. These chemicals were used in the production of non-stick, stain repellent and chemically inert coatings. 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
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
2024ND10ND

ppt = parts per trillion

State, National, and Health Guidelines for Drinking Water

EWG Health Guideline: 0.006 ppt

The EWG Health Guideline of 6 ppt for perfluorononanoic acid was defined by EPA recommended application of the toxicity value for PFDA published in the Integrated Risk Information System’s toxicological review . This health guideline harm to the immune system and harm to fetal growth and child development.

EPA Maximum Contaminant
Level (MCL): 10 ppt

ppt = parts per trillion

All test results

NOTE: Harris County Municipal Utility District 158 purchases water from City of Houston which is required to test for perfluorononanoic acid (pfna). 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