Diquat
West Baton Rouge Water Works District 2
Diquat is a herbicide used on potato crops and aquatic weeds.
12
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 | ND | 4 | 0 | ND |
| 2020 | ND | 2 | 0 | ND |
| 2021 | ND | 3 | 0 | ND |
| 2022 | ND | 2 | 0 | ND |
| 2023 | ND | 1 | 0 | ND |
ppb = parts per billion
State, National, and Health Guidelines for Drinking Water
EWG Health Guideline: 6 ppb
The EWG Health Guideline of 6 ppb for diquat was defined by the California Office of Environmental Health Hazard Assessment as a public health goal, the level of a drinking water contaminant that does not pose a significant health risk. This health guideline protects against cataracts.
EPA Maximum Contaminant
Level (MCL): 20 ppb
The legal limit for diquat, established in 1992, was based on a toxicity study in laboratory animals conducted in the 1980s.
ppb = parts per billion
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2019-06-18 | 35476846005 | ND |
| 2019-06-18 | 35476846005 | ND |
| 2019-10-08 | 35504152001 | ND |
| 2019-10-08 | 35504152001 | ND |
| 2020-01-15 | 35524566004 | ND |
| 2020-11-10 | 35591333001 | ND |
| 2021-02-04 | 35609851001 | ND |
| 2021-05-18 | 35634927001 | ND |
| 2021-09-20 | 35665075002 | ND |
| 2022-06-21 | 35727308001 | ND |
| 2022-10-17 | 35754574001 | ND |
| 2023-01-10 | 35772224001 | ND |