Diquat
Eastern Heights Utilities
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 | N/A | 0 | 0 | N/A |
2015 | ND | 6 | 0 | ND |
2016 | N/A | 0 | 0 | N/A |
2017 | N/A | 0 | 0 | N/A |
2018 | ND | 6 | 0 | ND |
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 |
---|---|---|
2015-04-07 | 2015040461RS28-1 | ND |
2015-04-07 | 2015040462RS28-1 | ND |
2015-04-07 | 2015040472RS28-1 | ND |
2015-07-27 | 2015072977RS28-1 | ND |
2015-07-27 | 2015072982RS28-1 | ND |
2015-07-27 | 2015073109RS28-1 | ND |
2018-05-29 | 2018052786RS28-1 | ND |
2018-05-29 | 2018052788RS28-1 | ND |
2018-05-29 | 2018052789RS28-1 | ND |
2018-08-20 | 2018083136RS28-1 | ND |
2018-08-20 | 2018083137RS28-1 | ND |
2018-08-20 | 2018083165RS28-1 | ND |