Dalapon
Grape Hammock
The herbicide dalapon has not been used in the U.S. since 1999. In animal studies, exposure to dalapon harms the kidneys.
8
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 | 0.750 ppb | 2 | 1 | ND - 1.50 ppb |
| 2019 | 1.10 ppb | 3 | 1 | ND - 3.30 ppb |
| 2020 | 1.90 ppb | 1 | 1 | 1.90 ppb |
| 2021 | ND | 1 | 0 | ND |
| 2022 | N/A | 0 | 0 | N/A |
| 2023 | 0.660 ppb | 1 | 1 | 0.660 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 | Result |
|---|---|
| 2018-08-15 | 1.50 ppb |
| 2018-12-20 | ND |
| 2019-02-13 | ND |
| 2019-05-21 | ND |
| 2019-07-17 | 3.30 ppb |
| 2020-09-21 | 1.90 ppb |
| 2021-09-16 | ND |
| 2023-09-20 | 0.660 ppb |