Know Your Environment. Protect Your Health.

Perfluorononanoic acid (PFNA)

Williamson County Municipal Utility District 10

NOTE: Williamson County Municipal Utility District 10 purchases water from City of Round Rock which is required to test for perfluorononanoic acid (pfna). Sample information shown below was taken by City of Round Rock.

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.

 

8

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013ND40ND
2014ND40ND
2015N/A00N/A
2016N/A00N/A
2017N/A00N/A
2018N/A00N/A
2019N/A00N/A
2020N/A00N/A
2021N/A00N/A
2022N/A00N/A
2023N/A00N/A
2024ND20ND

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: Williamson County Municipal Utility District 10 purchases water from City of Round Rock which is required to test for perfluorononanoic acid (pfna). Sample information shown below was taken by City of Round Rock.

Date Lab ID Result
2013-08-22Q1305914001ND
2013-08-22Q1305914005ND
2013-08-22Q1305914003ND
2013-11-20Q1313963001ND
2014-02-24Q1405878001ND
2014-02-24Q1405878005ND
2014-02-24Q1405878003ND
2014-05-28Q1417951001ND