Diquat
Coon Rapids
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 | N/A | 0 | 0 | N/A |
| 2020 | N/A | 0 | 0 | N/A |
| 2021 | ND | 1 | 0 | ND |
| 2022 | ND | 11 | 0 | ND |
| 2023 | N/A | 0 | 0 | N/A |
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 |
|---|---|---|
| 2021-11-18 | 8059-1 | ND |
| 2022-02-01 | 13649-1 | ND |
| 2022-02-01 | 13649-2 | ND |
| 2022-03-24 | 18957-1 | ND |
| 2022-05-18 | 25121-1 | ND |
| 2022-05-18 | 25121-2 | ND |
| 2022-05-18 | 25121-3 | ND |
| 2022-07-27 | 31951-1 | ND |
| 2022-07-27 | 31951-2 | ND |
| 2022-07-27 | 31951-3 | ND |
| 2022-11-09 | 44168-1 | ND |
| 2022-11-09 | 44168-2 | ND |