Diquat
Elizabethtown Area Water
Diquat is a herbicide used on potato crops and aquatic weeds.
24
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 | N/A | 0 | 0 | N/A |
| 2020 | ND | 12 | 0 | ND |
| 2021 | N/A | 0 | 0 | N/A |
| 2022 | N/A | 0 | 0 | N/A |
| 2023 | ND | 12 | 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 |
|---|---|---|
| 2020-05-26 | 22567520.00 | ND |
| 2020-05-26 | 22567550.00 | ND |
| 2020-05-26 | 22567430.00 | ND |
| 2020-05-26 | 22567490.00 | ND |
| 2020-05-26 | 22567400.00 | ND |
| 2020-05-26 | 22567460.00 | ND |
| 2020-08-03 | 22957760.00 | ND |
| 2020-08-03 | 22957730.00 | ND |
| 2020-08-03 | 22957640.00 | ND |
| 2020-08-03 | 22957700.00 | ND |
| 2020-08-03 | 22957610.00 | ND |
| 2020-08-03 | 22957670.00 | ND |
| 2023-04-24 | 29061663.00 | ND |
| 2023-04-24 | 29061666.00 | ND |
| 2023-04-24 | 29061668.00 | ND |
| 2023-04-24 | 29061665.00 | ND |
| 2023-04-24 | 29061667.00 | ND |
| 2023-04-24 | 29061664.00 | ND |
| 2023-08-28 | 29849144.00 | ND |
| 2023-08-28 | 29849143.00 | ND |
| 2023-08-28 | 29849142.00 | ND |
| 2023-08-28 | 29849145.00 | ND |
| 2023-08-28 | 29849141.00 | ND |
| 2023-08-28 | 29849140.00 | ND |