Diquat
Atoka Public Water System
Diquat is a herbicide used on potato crops and aquatic weeds.
10
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 | ND | 2 | 0 | ND |
| 2019 | ND | 4 | 0 | ND |
| 2020 | ND | 1 | 0 | ND |
| 2021 | ND | 1 | 0 | ND |
| 2022 | ND | 1 | 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 |
|---|---|---|
| 2018-07-25 | AG25063-01 | ND |
| 2018-10-15 | AJ16016-01 | ND |
| 2019-01-14 | BA15011-01 | ND |
| 2019-04-10 | BD10048-01 | ND |
| 2019-08-28 | BH28019-01 | ND |
| 2019-10-23 | BJ23060-01 | ND |
| 2020-04-08 | CD08033-01 | ND |
| 2021-05-12 | 106261-01 | ND |
| 2022-07-06 | 112309-01 | ND |
| 2023-05-11 | 116999-01 | ND |