Know Your Environment. Protect Your Health.

Perfluorononanoic acid (PFNA)

Halifax Water Department

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.

 

36

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
20201.28 ppt96ND - 2.87 ppt
2021ND60ND
2022ND180ND
2023ND60ND
2024ND60ND

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 Result
2021-10-12ND
2021-10-12ND
2021-10-12ND
2021-10-12ND
2021-11-16ND
2021-11-16ND
2022-01-06ND
2022-01-06ND
2022-01-06ND
2022-01-06ND
2022-02-17ND
2022-04-06ND
2022-04-06ND
2022-04-06ND
2022-04-06ND
2022-05-04ND
2022-06-21ND
2022-07-18ND
2022-07-18ND
2022-07-18ND
2022-07-18ND
2022-08-16ND
2022-09-12ND
2022-10-17ND
2023-01-03ND
2023-01-03ND
2023-01-03ND
2023-04-05ND
2023-07-05ND
2023-10-02ND
2024-01-10ND
2024-01-10ND
2024-01-10ND
2024-01-10ND
2024-07-09ND
2024-07-09ND