Perfluorononanoic acid (PFNA)
Warrington Twp Water&sew Dept
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 | ND | 8 | 0 | ND |
| 2015 | ND | 9 | 0 | ND |
| 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 | ND | 1 | 0 | ND |
| 2021 | ND | 11 | 0 | ND |
| 2022 | 0.445 ppt | 11 | 2 | ND - 3.00 ppt |
| 2023 | ND | 24 | 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 |
|---|---|---|
| 2014-11-11 | 831004-12827 | ND |
| 2014-11-11 | 831006-12827 | ND |
| 2014-11-11 | 830998-12827 | ND |
| 2014-11-11 | 831002-12827 | ND |
| 2014-11-11 | 831008-12827 | ND |
| 2014-11-11 | 831014-12857 | ND |
| 2014-11-11 | 831012-12857 | ND |
| 2014-11-11 | 831016-12857 | ND |
| 2015-02-09 | 842481-13364 | ND |
| 2015-05-11 | 859202-14084 | ND |
| 2015-05-11 | 859194-14084 | ND |
| 2015-05-11 | 859208-14084 | ND |
| 2015-05-11 | 859200-14084 | ND |
| 2015-05-11 | 859204-14084 | ND |
| 2015-05-11 | 859198-14084 | ND |
| 2015-05-11 | 859192-14084 | ND |
| 2015-08-20 | 3305497 | ND |
| 2021-05-11 | 25747894.00 | ND |
| 2021-05-11 | 25747942.00 | ND |
| 2021-06-08 | 25747954.00 | ND |
| 2021-06-08 | 25748002.00 | ND |
| 2021-08-10 | 25748014.00 | ND |
| 2021-08-10 | 25748062.00 | ND |
| 2021-09-30 | 25387446.00 | ND |
| 2021-11-16 | 25748075.00 | ND |
| 2021-11-16 | 25748123.00 | ND |
| 2021-11-16 | 25748135.00 | ND |
| 2021-12-16 | 25748214.00 | ND |
| 2022-01-11 | 25926017.00 | ND |
| 2022-01-11 | 25926065.00 | ND |
| 2022-05-10 | 26631151.00 | 1.90 ppt |
| 2022-05-10 | 26631115.00 | ND |
| 2022-05-10 | 26631127.00 | ND |
| 2022-05-10 | 26631139.00 | 3.00 ppt |
| 2022-05-10 | 26631163.00 | ND |
| 2022-08-10 | 27215863.00 | ND |
| 2022-08-10 | 27215815.00 | ND |
| 2022-11-10 | 27807348.00 | ND |
| 2022-11-10 | 27807300.00 | ND |
| 2023-02-09 | 28333934.00 | ND |
| 2023-02-09 | 28333886.00 | ND |
| 2023-03-14 | 28505204.00 | ND |
| 2023-03-14 | 28505216.00 | ND |
| 2023-03-16 | 28683836.00 | ND |
| 2023-03-16 | 28683824.00 | ND |
| 2023-04-18 | 28881629.00 | ND |
| 2023-04-18 | 28881689.00 | ND |
| 2023-04-18 | 28881653.00 | ND |
| 2023-04-18 | 28881665.00 | ND |
| 2023-05-11 | 29090282.00 | ND |
| 2023-05-11 | 29090330.00 | ND |
| 2023-08-10 | 29477776.00 | ND |
| 2023-08-10 | 29477824.00 | ND |
| 2023-11-09 | 30054405.00 | ND |
| 2023-11-09 | 30054357.00 | ND |
| 2023-11-14 | 30054783.00 | ND |
| 2023-11-14 | 30054795.00 | ND |
| 2023-11-14 | 30054819.00 | ND |
| 2023-11-14 | 30054831.00 | ND |
| 2023-11-14 | 30054759.00 | ND |
| 2023-11-14 | 30054747.00 | ND |
| 2023-11-16 | 30054867.00 | ND |
| 2023-11-16 | 30054855.00 | ND |