Know Your Environment. Protect Your Health.

Perfluorononanoic acid (PFNA)

Twin Lakes Water Works Corporation

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.

 

34

Samples

0

Samples exceeding legal limit (MCL)

6

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018N/A00N/A
2019N/A00N/A
2020N/A00N/A
20210.143 ppt121ND - 1.71 ppt
20220.242 ppt132ND - 1.61 ppt
20230.327 ppt93ND - 1.02 ppt

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

Date Lab ID Result
2021-05-21CI37084-PFASND
2021-05-21CI37083-PFASND
2021-05-21CI37085-PFASND
2021-07-29CI87333-PFASND
2021-08-24CJ16362-PFASND
2021-08-24CJ16360-PFAS1.71 ppt
2021-08-24CJ16361-PFASND
2021-09-27CJ45031-PFASND
2021-11-11CJ76209-PFASND
2021-11-11CJ769210-PFASND
2021-11-11CJ76211-PFASND
2021-12-02CJ89056-PFASND
2022-03-11CK84967-PFASND
2022-03-11CK84966-PFASND
2022-03-11CK84968-PFASND
2022-04-21CL15114-PFAS1.61 ppt
2022-06-07CL51783-PFASND
2022-06-07CL51782-PFASND
2022-06-30CL68842-PFASND
2022-08-16CM34070-PFAS1.54 ppt
2022-09-16CM34071-PFASND
2022-10-07CM51791-PFASND
2022-11-14CM84804-PFASND
2022-11-14CM84803-PFASND
2022-12-02CM96447-PFASND
2023-01-05CN18603-PFASND
2023-02-19CN46525-PFASND
2023-02-19CN46526-PFASND
2023-05-10CO02847-PFASND
2023-05-10CO02846-PFAS1.02 ppt
2023-09-25CP08627-PFASND
2023-09-25CP08626-PFAS0.953 ppt
2023-11-30CP57089-PFASND
2023-11-30CP57090-PFAS0.969 ppt