Diquat
East Hempfield Water 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 | 12 | 0 | ND |
2015 | N/A | 0 | 0 | N/A |
2016 | N/A | 0 | 0 | N/A |
2017 | ND | 12 | 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 |
---|---|---|
2014-05-21 | 14030670-01 | ND |
2014-05-21 | 14030680-01 | ND |
2014-05-21 | 14030683-01 | ND |
2014-05-21 | 14030690-01 | ND |
2014-05-21 | 14030693-01 | ND |
2014-05-21 | 14030695-01 | ND |
2014-08-20 | 14030681-01 | ND |
2014-08-20 | 14030684-01 | ND |
2014-08-20 | 14030692-01 | ND |
2014-08-20 | 14030694-01 | ND |
2014-08-20 | 14030696-01 | ND |
2014-08-20 | 14030672-01 | ND |
2017-04-17 | 16218402 | ND |
2017-04-17 | 16218372 | ND |
2017-04-17 | 16218342 | ND |
2017-04-17 | 16218313 | ND |
2017-06-12 | 16378287 | ND |
2017-06-12 | 16378257 | ND |
2017-08-25 | 16844284 | ND |
2017-08-25 | 16844262 | ND |
2017-08-25 | 16844306 | ND |
2017-08-25 | 16844328 | ND |
2017-08-25 | 16844350 | ND |
2017-08-25 | 16844240 | ND |