Diquat
City of Mountain Home
Diquat is a herbicide used on potato crops and aquatic weeds.
34
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 | 1 | 0 | ND |
| 2019 | ND | 6 | 0 | ND |
| 2020 | N/A | 0 | 0 | N/A |
| 2021 | ND | 10 | 0 | ND |
| 2022 | ND | 17 | 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 |
|---|---|---|
| 2018-08-01 | S1836908 | ND |
| 2019-06-11 | S1927642 | ND |
| 2019-06-11 | S1927641 | ND |
| 2019-07-25 | S1936441 | ND |
| 2019-07-25 | S1936442 | ND |
| 2019-07-25 | S1936443 | ND |
| 2019-12-03 | S1960165 | ND |
| 2021-09-09 | S2147367 | ND |
| 2021-09-09 | S2147369 | ND |
| 2021-09-09 | S2147371 | ND |
| 2021-09-22 | S2150231 | ND |
| 2021-10-14 | S2155146 | ND |
| 2021-11-18 | S2162863 | ND |
| 2021-11-18 | S2162864 | ND |
| 2021-11-18 | S2162862 | ND |
| 2021-11-18 | S2162860 | ND |
| 2021-11-18 | S2162861 | ND |
| 2022-02-24 | S2209172 | ND |
| 2022-02-24 | S2209174 | ND |
| 2022-02-24 | S2209169 | ND |
| 2022-02-24 | S2209171 | ND |
| 2022-02-24 | S2209173 | ND |
| 2022-05-11 | S2222541 | ND |
| 2022-05-11 | S2222518 | ND |
| 2022-05-11 | S2222516 | ND |
| 2022-07-20 | S2234917 | ND |
| 2022-10-19 | S2252294 | ND |
| 2022-10-19 | S2252293 | ND |
| 2022-10-19 | S2252291 | ND |
| 2022-10-19 | S2252295 | ND |
| 2022-10-19 | S2252296 | ND |
| 2022-10-19 | S2252297 | ND |
| 2022-10-19 | S2252298 | ND |
| 2022-10-19 | S2252299 | ND |