Diquat
City of Kuna
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 | 3 | 0 | ND |
| 2019 | ND | 1 | 0 | ND |
| 2020 | N/A | 0 | 0 | N/A |
| 2021 | N/A | 0 | 0 | N/A |
| 2022 | ND | 6 | 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 |
|---|---|---|
| 2018-03-26 | S1812803 | ND |
| 2018-06-20 | S1828518 | ND |
| 2018-09-25 | S1847685 | ND |
| 2019-09-16 | S1946341 | ND |
| 2022-02-17 | S2208071 | ND |
| 2022-02-25 | S2209304 | ND |
| 2022-03-04 | S2210476 | ND |
| 2022-03-04 | S2210478 | ND |
| 2022-05-27 | S2225489 | ND |
| 2022-12-13 | S2260887 | ND |