Diquat
Gettysburg Municipal Authority
Diquat is a herbicide used on potato crops and aquatic weeds.
29
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 | 15 | 0 | ND |
| 2021 | N/A | 0 | 0 | N/A |
| 2022 | N/A | 0 | 0 | N/A |
| 2023 | ND | 14 | 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 |
|---|---|---|
| 2020-05-12 | 22350009.00 | ND |
| 2020-05-12 | 22349980.00 | ND |
| 2020-05-12 | 22349922.00 | ND |
| 2020-05-18 | 22350041.00 | ND |
| 2020-05-18 | 22349954.00 | ND |
| 2020-05-20 | 22349867.00 | ND |
| 2020-05-20 | 22349896.00 | ND |
| 2020-08-18 | 22937362.00 | ND |
| 2020-08-18 | 22937304.00 | ND |
| 2020-08-19 | 22937333.00 | ND |
| 2020-08-19 | 22937391.00 | ND |
| 2020-08-24 | 23125293.00 | ND |
| 2020-08-24 | 23125264.00 | ND |
| 2020-08-24 | 23125322.00 | ND |
| 2020-12-02 | 23656067.00 | ND |
| 2023-05-16 | 29242394.00 | ND |
| 2023-05-16 | 29242338.00 | ND |
| 2023-05-16 | 29242366.00 | ND |
| 2023-05-17 | 29242803.00 | ND |
| 2023-05-17 | 29242775.00 | ND |
| 2023-05-17 | 29242747.00 | ND |
| 2023-05-30 | 29242724.00 | ND |
| 2023-08-01 | 29639337.00 | ND |
| 2023-08-01 | 29639257.00 | ND |
| 2023-08-15 | 29639302.00 | ND |
| 2023-08-16 | 29829433.00 | ND |
| 2023-08-16 | 29829408.00 | ND |
| 2023-08-22 | 29829494.00 | ND |
| 2023-08-22 | 29829466.00 | ND |