Diquat
Avion Water Company - Greater Avion
Diquat is a herbicide used on potato crops and aquatic weeds.
21
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 | 8 | 0 | ND |
| 2020 | N/A | 0 | 0 | N/A |
| 2021 | ND | 12 | 0 | ND |
| 2022 | N/A | 0 | 0 | N/A |
| 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 |
|---|---|---|
| 2019-02-20 | 1911473-S | ND |
| 2019-03-26 | 1920362-S | ND |
| 2019-04-09 | 1924429-S | ND |
| 2019-04-25 | 1929191-S | ND |
| 2019-05-09 | 1932771-S | ND |
| 2019-09-11 | 1966990-S | ND |
| 2019-09-12 | 1967778-S | ND |
| 2019-10-14 | 1976522-S | ND |
| 2021-05-18 | 2133902-S | ND |
| 2021-05-18 | 2133881-S | ND |
| 2021-05-24 | 2135371-S | ND |
| 2021-05-24 | 2135368-S | ND |
| 2021-05-25 | 2135557-S | ND |
| 2021-05-25 | 2135558-S | ND |
| 2021-07-28 | 2153636-S | ND |
| 2021-07-28 | 2153633-S | ND |
| 2021-07-29 | 2153951-S | ND |
| 2021-08-30 | 2162787-S | ND |
| 2021-08-30 | 2162790-S | ND |
| 2021-09-21 | 2169292-S | ND |
| 2023-05-16 | 23-28420-S | ND |