Perfluoroheptanoic acid (PFHPA)
Golden State Water Company (GSWC) - Claremont
Perfluoroheptanoic acid is a member of a group of perfluorinated chemicals used in many consumer products. Perfluorinated chemicals can cause serious health effects, including cancer, endocrine disruption, accelerated puberty, liver and immune system damage, and thyroid changes. These chemicals are persistent in the environment and they accumulate in people. 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 | ND | 3 | 0 | ND |
| 2020 | ND | 2 | 0 | ND |
| 2021 | 3.00 ppt | 4 | 4 | 2.90 ppt - 3.10 ppt |
| 2022 | 2.23 ppt | 3 | 2 | ND - 3.40 ppt |
| 2023 | 1.92 ppt | 27 | 12 | ND - 11.0 ppt |
| 2024 | 0.250 ppt | 12 | 1 | ND - 3.00 ppt |
ppt = parts per trillion
State, National, and Health Guidelines for Drinking Water
EWG Health Guideline: 1,000 ppt
The EWG Health Guideline of 1,000 ppt for perfluoroheptanoic acid was defined by EPA's recommended application of the toxicity value for PFHxA published in the Integrated Risk Information System’s toxicological review. This health guideline harm to fetal growth and child development.
ppt = parts per trillion
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2021-06-10 | CA1910024_076_076-202106101245 | 3.10 ppt |
| 2021-07-09 | CA1910024_076_076-202107091300 | 3.00 ppt |
| 2021-09-22 | CA1910024_076_076-202109221145 | 3.00 ppt |
| 2021-11-30 | CA1910024_076_076-202111300930 | 2.90 ppt |
| 2022-02-14 | CA1910024_076_076-202202140859 | 3.30 ppt |
| 2022-03-03 | CA1910024_076_076-202203030845 | 3.40 ppt |
| 2022-05-14 | CA1910024_078_078-202205141000 | ND |
| 2023-02-21 | CA1910024_019_019-202302211400 | ND |
| 2023-02-22 | CA1910024_076_076-202302221045 | 3.60 ppt |
| 2023-03-31 | CA1910024_076_076-202303311100 | 3.40 ppt |
| 2023-05-02 | CA1910024_019_019-202305020950 | ND |
| 2023-05-02 | CA1910024_076_076-202305021010 | 4.00 ppt |
| 2023-07-18 | CA1910024_019_019-202307181100 | ND |
| 2023-07-18 | CA1910024_076_076-202307181030 | 3.40 ppt |
| 2023-09-18 | 380-63376-2 | ND |
| 2023-09-18 | 380-63376-1 | ND |
| 2023-09-19 | 380-63565-3 | ND |
| 2023-09-19 | 380-63565-1 | ND |
| 2023-09-19 | 380-63565-2 | ND |
| 2023-09-27 | 380-64632-5 | ND |
| 2023-09-27 | 380-64632-1 | 3.00 ppt |
| 2023-09-27 | 380-64632-3 | ND |
| 2023-09-27 | 380-64632-2 | ND |
| 2023-10-24 | CA1910024_076_076-202310241005 | 3.90 ppt |
| 2023-10-24 | CA1910024_019_019-202310241110 | ND |
| 2023-11-06 | CA1910024_006_006-202311061110 | 2.20 ppt |
| 2023-11-06 | CA1910024_068_068-202311060910 | ND |
| 2023-11-06 | CA1910024_017_017-202311061142 | 11.0 ppt |
| 2023-11-06 | CA1910024_065_065-202311061135 | 3.70 ppt |
| 2023-11-06 | CA1910024_037_037-202311061150 | ND |
| 2023-11-06 | CA1910024_033_033-202311061157 | 4.90 ppt |
| 2023-12-07 | 380-74068-1 | 4.20 ppt |
| 2023-12-07 | 380-74068-2 | ND |
| 2023-12-11 | 380-74411-1 | 4.60 ppt |
| 2024-03-19 | 380-87827-2 | ND |
| 2024-03-19 | 380-87827-1 | 3.00 ppt |
| 2024-03-26 | 380-88646-5 | ND |
| 2024-03-26 | 380-88646-1 | ND |
| 2024-03-26 | 380-88646-3 | ND |
| 2024-03-26 | 380-88646-2 | ND |
| 2024-03-26 | 380-88646-4 | ND |
| 2024-03-26 | 380-88646-6 | ND |
| 2024-03-26 | 380-88646-7 | ND |
| 2024-03-27 | 380-88834-1 | ND |
| 2024-06-04 | 380-98350-2 | ND |
| 2024-06-04 | 380-98350-1 | ND |