Dalapon
Houma Water Treatment Service Area
The herbicide dalapon has not been used in the U.S. since 1999. In animal studies, exposure to dalapon harms the kidneys.
16
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 | 0.950 ppb | 4 | 2 | ND - 1.90 ppb |
| 2019 | ND | 4 | 0 | ND |
| 2020 | ND | 2 | 0 | ND |
| 2021 | 0.390 ppb | 2 | 2 | 0.380 ppb - 0.400 ppb |
| 2022 | 0.600 ppb | 2 | 2 | 0.530 ppb - 0.670 ppb |
| 2023 | ND | 2 | 0 | ND |
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 |
|---|---|---|
| 2018-02-26 | 35377894002 | ND |
| 2018-02-26 | 35377894002 | ND |
| 2018-08-23 | 35413192001 | 1.90 ppb |
| 2018-08-23 | 35413192001 | 1.90 ppb |
| 2019-02-18 | 35449356001 | ND |
| 2019-02-18 | 35449356001 | ND |
| 2019-08-28 | 35494058001 | ND |
| 2019-08-28 | 35494058001 | ND |
| 2020-01-22 | 35526020001 | ND |
| 2020-12-03 | 35596462001 | ND |
| 2021-03-11 | 35619288001 | 0.380 ppb |
| 2021-11-04 | 35675777001 | 0.400 ppb |
| 2022-03-02 | 35701433001 | 0.530 ppb |
| 2022-10-12 | 35753132001 | 0.670 ppb |
| 2023-04-11 | 35791937002 | ND |
| 2023-12-14 | 35848535001 | ND |