Perfluorononanoic acid (PFNA)
Riverdale Park Tract Community Services District
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 |
|---|---|---|---|---|
| 2018 | N/A | 0 | 0 | N/A |
| 2019 | ND | 3 | 0 | ND |
| 2020 | ND | 4 | 0 | ND |
| 2021 | ND | 4 | 0 | ND |
| 2022 | ND | 4 | 0 | ND |
| 2023 | ND | 4 | 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 |
|---|---|---|
| 2019-06-18 | CA5000019_003_003-201906181030 | ND |
| 2019-09-10 | CA5000019_003_003-201909101745 | ND |
| 2019-12-20 | CA5000019_003_003-201912201101 | ND |
| 2020-03-30 | CA5000019_003_003-202003301133 | ND |
| 2020-04-27 | CA5000019_003_003-202004271000 | ND |
| 2020-07-21 | CA5000019_003_003-202007210800 | ND |
| 2020-10-07 | CA5000019_003_003-202010071140 | ND |
| 2021-01-27 | CA5000019_003_003-202101270915 | ND |
| 2021-04-14 | CA5000019_003_003-202104140929 | ND |
| 2021-07-21 | CA5000019_003_003-202107210841 | ND |
| 2021-10-27 | CA5000019_003_003-202110271040 | ND |
| 2022-01-11 | CA5000019_003_003-202201111000 | ND |
| 2022-04-11 | CA5000019_003_003-202204111246 | ND |
| 2022-07-13 | CA5000019_003_003-202207131010 | ND |
| 2022-10-03 | CA5000019_003_003-202210031350 | ND |
| 2023-01-03 | CA5000019_003_003-202301031254 | ND |
| 2023-05-22 | CA5000019_003_003-202305221000 | ND |
| 2023-07-11 | CA5000019_003_003-202307111400 | ND |
| 2023-10-03 | CA5000019_003_003-202310031245 | ND |