Diquat
New Orleans Algiers Water Works
Diquat is a herbicide used on potato crops and aquatic weeds.
16
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 | 4 | 0 | ND |
| 2019 | ND | 4 | 0 | ND |
| 2020 | ND | 2 | 0 | ND |
| 2021 | ND | 2 | 0 | ND |
| 2022 | ND | 2 | 0 | ND |
| 2023 | ND | 2 | 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 |
|---|---|---|
| 2018-01-30 | 35371297003 | ND |
| 2018-01-30 | 35371297003 | ND |
| 2018-10-02 | 35421764001 | ND |
| 2018-10-02 | 35421764001 | ND |
| 2019-02-05 | 35446734001 | ND |
| 2019-02-05 | 35446734001 | ND |
| 2019-08-14 | 35490420001 | ND |
| 2019-08-14 | 35490420001 | ND |
| 2020-03-18 | 35538517001 | ND |
| 2020-10-26 | 35587653001 | ND |
| 2021-03-29 | 35622312001 | ND |
| 2021-12-08 | 35683695001 | ND |
| 2022-03-15 | 35704704001 | ND |
| 2022-10-13 | 35753421001 | ND |
| 2023-03-06 | 35783941001 | ND |
| 2023-10-31 | 35838748001 | ND |