Dalapon
Leon Water Supply
The herbicide dalapon has not been used in the U.S. since 1999. In animal studies, exposure to dalapon harms the kidneys.
7
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 | 0.800 ppb | 1 | 1 | 0.800 ppb |
| 2019 | 0.600 ppb | 1 | 1 | 0.600 ppb |
| 2020 | 1.10 ppb | 1 | 1 | 1.10 ppb |
| 2021 | 1.30 ppb | 1 | 1 | 1.30 ppb |
| 2022 | 4.50 ppb | 2 | 2 | 2.50 ppb - 6.50 ppb |
| 2023 | 1.30 ppb | 1 | 1 | 1.30 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 |
|---|---|---|
| 2018-04-02 | OE640310 | 0.800 ppb |
| 2019-06-04 | OE816472 | 0.600 ppb |
| 2020-05-04 | OE994875 | 1.10 ppb |
| 2021-04-19 | OE1666837 | 1.30 ppb |
| 2022-05-02 | OE2091836 | 6.50 ppb |
| 2022-06-21 | OE2122058 | 2.50 ppb |
| 2023-04-17 | OE2268477 | 1.30 ppb |