Diquat
Paw Glen Alsace Div
Diquat is a herbicide used on potato crops and aquatic weeds.
58
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 | 5 | 0 | ND |
| 2020 | ND | 25 | 0 | ND |
| 2021 | ND | 1 | 0 | ND |
| 2022 | ND | 1 | 0 | ND |
| 2023 | ND | 25 | 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 |
|---|---|---|
| 2018-02-13 | 38539301 | ND |
| 2019-02-05 | 42852901 | ND |
| 2019-07-22 | 45717501 | ND |
| 2019-07-22 | 45717601 | ND |
| 2019-07-22 | 45717401 | ND |
| 2019-07-29 | 46133302 | ND |
| 2020-02-11 | 21708734.00 | ND |
| 2020-05-04 | 22262939.00 | ND |
| 2020-05-04 | 22262910.00 | ND |
| 2020-05-06 | 22263078.00 | ND |
| 2020-05-11 | 22262968.00 | ND |
| 2020-05-11 | 22262997.00 | ND |
| 2020-05-11 | 22262823.00 | ND |
| 2020-05-13 | 22262881.00 | ND |
| 2020-05-13 | 22263049.00 | ND |
| 2020-05-13 | 22262852.00 | ND |
| 2020-05-18 | 22263391.00 | ND |
| 2020-05-19 | 22263449.00 | ND |
| 2020-05-19 | 22263420.00 | ND |
| 2020-08-04 | 22845390.00 | ND |
| 2020-08-04 | 22845361.00 | ND |
| 2020-08-06 | 22845332.00 | ND |
| 2020-08-06 | 22845511.00 | ND |
| 2020-08-11 | 22845482.00 | ND |
| 2020-08-11 | 22845453.00 | ND |
| 2020-08-11 | 22845424.00 | ND |
| 2020-08-12 | 22845890.00 | ND |
| 2020-08-12 | 22845919.00 | ND |
| 2020-08-12 | 22845303.00 | ND |
| 2020-08-13 | 22845977.00 | ND |
| 2020-08-18 | 22845948.00 | ND |
| 2021-02-10 | 23928408.00 | ND |
| 2022-02-21 | 26157320.00 | ND |
| 2023-02-08 | 28389672.00 | ND |
| 2023-05-04 | 28950169.00 | ND |
| 2023-05-04 | 28950140.00 | ND |
| 2023-05-04 | 28950053.00 | ND |
| 2023-05-04 | 28950111.00 | ND |
| 2023-05-04 | 28950082.00 | ND |
| 2023-05-11 | 28950259.00 | ND |
| 2023-05-11 | 28949995.00 | ND |
| 2023-05-11 | 28950228.00 | ND |
| 2023-05-11 | 28950288.00 | ND |
| 2023-05-11 | 28949966.00 | ND |
| 2023-05-11 | 28950024.00 | ND |
| 2023-05-11 | 28950230.00 | ND |
| 2023-08-03 | 29546809.00 | ND |
| 2023-08-03 | 29546860.00 | ND |
| 2023-08-03 | 29546807.00 | ND |
| 2023-08-03 | 29546884.00 | ND |
| 2023-08-03 | 29546896.00 | ND |
| 2023-08-09 | 29546998.00 | ND |
| 2023-08-09 | 29546722.00 | ND |
| 2023-08-09 | 29546751.00 | ND |
| 2023-08-09 | 29546693.00 | ND |
| 2023-08-10 | 29546928.00 | ND |
| 2023-08-10 | 29546664.00 | ND |
| 2023-08-10 | 29546957.00 | ND |