Diquat
Whitehall Twp Authority
Diquat is a herbicide used on potato crops and aquatic weeds.
Testing results - average by year
Year | Average result | Samples taken | Detections | Range of results |
---|---|---|---|---|
2014 | ND | 10 | 0 | ND |
2015 | N/A | 0 | 0 | N/A |
2016 | N/A | 0 | 0 | N/A |
2017 | ND | 10 | 0 | ND |
2018 | N/A | 0 | 0 | N/A |
2019 | N/A | 0 | 0 | N/A |
ppb = parts per billion
State and national drinking water standards and health guidelines
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 |
---|---|---|
2014-05-06 | 14030839-01 | ND |
2014-05-06 | 14030841-01 | ND |
2014-05-06 | 14030843-01 | ND |
2014-05-06 | 14030845-01 | ND |
2014-05-06 | 14030847-01 | ND |
2014-08-12 | 14030842-01 | ND |
2014-08-12 | 14030844-01 | ND |
2014-08-12 | 14030846-01 | ND |
2014-08-12 | 14030848-01 | ND |
2014-08-12 | 14030840-01 | ND |
2017-05-02 | 16145199 | ND |
2017-05-02 | 16145171 | ND |
2017-05-02 | 16145143 | ND |
2017-05-02 | 16145113 | ND |
2017-05-02 | 16145085 | ND |
2017-08-01 | 16615155 | ND |
2017-08-01 | 16615125 | ND |
2017-08-01 | 16615185 | ND |
2017-08-01 | 16615215 | ND |
2017-08-01 | 16615095 | ND |