Perfluorononanoic acid (PFNA)
Horsham Water&sewer Authority
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.
Samples
Samples exceeding legal limit (MCL)
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2014 | N/A | 0 | 0 | N/A |
| 2015 | N/A | 0 | 0 | N/A |
| 2016 | N/A | 0 | 0 | N/A |
| 2017 | N/A | 0 | 0 | N/A |
| 2018 | N/A | 0 | 0 | N/A |
| 2019 | N/A | 0 | 0 | N/A |
| 2020 | N/A | 0 | 0 | N/A |
| 2021 | ND | 5 | 0 | ND |
| 2022 | N/A | 0 | 0 | N/A |
| 2023 | N/A | 0 | 0 | N/A |
| 2024 | ND | 13 | 0 | ND |
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 |
|---|---|---|
| 2021-07-08 | 24828144.00 | ND |
| 2021-07-08 | 24828158.00 | ND |
| 2021-07-08 | 24828102.00 | ND |
| 2021-07-08 | 24828116.00 | ND |
| 2021-07-19 | 25022970.00 | ND |
| 2024-02-20 | 810-94586-1 | ND |
| 2024-02-20 | 810-94569-1 | ND |
| 2024-02-20 | 810-94578-1 | ND |
| 2024-02-21 | 810-94900-1 | ND |
| 2024-02-21 | 810-94904-1 | ND |
| 2024-02-21 | 810-94903-1 | ND |
| 2024-02-22 | 810-95063-1 | ND |
| 2024-02-22 | 810-95066-1 | ND |
| 2024-02-22 | 810-95068-1 | ND |
| 2024-08-05 | 810-114803-1 | ND |
| 2024-08-05 | 810-114805-1 | ND |
| 2024-08-06 | 810-114954-1 | ND |
| 2024-08-06 | 810-115036-1 | ND |