Diquat
Aqua Pa Water Co. Honesdale
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 | N/A | 0 | 0 | N/A |
| 2019 | N/A | 0 | 0 | N/A |
| 2020 | ND | 8 | 0 | ND |
| 2021 | N/A | 0 | 0 | N/A |
| 2022 | N/A | 0 | 0 | N/A |
| 2023 | ND | 8 | 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 |
|---|---|---|
| 2020-04-16 | 22060036.00 | ND |
| 2020-04-16 | 22059956.00 | ND |
| 2020-04-16 | 22059970.00 | ND |
| 2020-04-16 | 22059993.00 | ND |
| 2020-07-09 | 22642921.00 | ND |
| 2020-07-09 | 22642885.00 | ND |
| 2020-07-09 | 22642849.00 | ND |
| 2020-08-25 | 22834889.00 | ND |
| 2023-04-20 | 28740239.00 | ND |
| 2023-04-20 | 28740149.00 | ND |
| 2023-04-20 | 28740210.00 | ND |
| 2023-04-20 | 28740179.00 | ND |
| 2023-07-20 | 29337295.00 | ND |
| 2023-07-20 | 29337259.00 | ND |
| 2023-07-20 | 29337487.00 | ND |
| 2023-07-20 | 29337223.00 | ND |