Dalapon
Highridge Water Authority
The herbicide dalapon has not been used in the U.S. since 1999. In animal studies, exposure to dalapon harms the kidneys.
20
Samples
0
Samples exceeding legal limit (MCL)
0
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 | N/A | 0 | 0 | N/A |
| 2020 | 0.417 ppb | 6 | 2 | ND - 1.50 ppb |
| 2021 | ND | 8 | 0 | ND |
| 2022 | 0.600 ppb | 2 | 1 | ND - 1.20 ppb |
| 2023 | 0.250 ppb | 4 | 1 | ND - 1.000 ppb |
ppb = parts per billion
State, National, and Health Guidelines for Drinking Water
EPA Maximum Contaminant
Level (MCL): 200 ppb
The legal limit for dalapon, established in 1992, was based on a toxicity study in laboratory animals published in 1960.
ppb = parts per billion
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2020-04-21 | 22134100.00 | ND |
| 2020-04-21 | 22134072.00 | ND |
| 2020-08-24 | 23104014.00 | 1.000 ppb |
| 2020-08-24 | 23104037.00 | 1.50 ppb |
| 2020-11-10 | 23462165.00 | ND |
| 2020-11-10 | 23462166.00 | ND |
| 2021-01-13 | 23814269.00 | ND |
| 2021-01-13 | 23814270.00 | ND |
| 2021-04-14 | 24356022.00 | ND |
| 2021-04-14 | 24356023.00 | ND |
| 2021-07-06 | 24940067.00 | ND |
| 2021-07-06 | 24940069.00 | ND |
| 2021-10-12 | 25512274.00 | ND |
| 2021-10-12 | 25512275.00 | ND |
| 2022-07-19 | 27151591.00 | ND |
| 2022-07-19 | 27151593.00 | 1.20 ppb |
| 2023-05-02 | 29019043.00 | ND |
| 2023-05-02 | 29019056.00 | ND |
| 2023-08-29 | 29808362.00 | ND |
| 2023-08-29 | 29808351.00 | 1.000 ppb |