Know Your Environment. Protect Your Health.

Perfluorononanoic acid (PFNA)

Sammamish Plateau Water and Sewer

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.

 

28

Samples

0

Samples exceeding legal limit (MCL)

2

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2015N/A00N/A
2016N/A00N/A
2017N/A00N/A
2018N/A00N/A
2019N/A00N/A
2020N/A00N/A
2021N/A00N/A
20222.04 ppt82ND - 8.30 ppt
2023ND190ND
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

Date Lab ID Result
2022-02-1642602168.30 ppt
2022-02-164260267ND
2022-02-164260284ND
2022-02-164260224ND
2022-02-1642602108.00 ppt
2022-02-164260285ND
2022-02-164260285ND
2022-02-164260279ND
2023-03-134455245ND
2023-03-134455243ND
2023-03-134455246ND
2023-03-134455244ND
2023-05-15380-47663-1ND
2023-05-15380-47677-2ND
2023-05-15380-47677-1ND
2023-06-26380-52589-1ND
2023-06-26380-52589-2ND
2023-06-26380-52589-3ND
2023-06-26380-52589-4ND
2023-08-07380-58185-1ND
2023-11-06380-70122-1ND
2023-11-06380-70113-1ND
2023-11-06380-70122-2ND
2023-11-06380-70122-3ND
2023-11-21380-72408-3ND
2023-11-21380-72408-2ND
2023-11-21380-72408-1ND
2024-02-12380-82943-1ND