Diquat
Greenville Water System
Diquat is a herbicide used on potato crops and aquatic weeds.
12
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 |
|---|---|---|---|---|
| 2014 | ND | 2 | 0 | ND |
| 2015 | ND | 2 | 0 | ND |
| 2016 | ND | 2 | 0 | ND |
| 2017 | ND | 2 | 0 | ND |
| 2018 | ND | 2 | 0 | ND |
| 2019 | ND | 2 | 0 | ND |
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 |
|---|---|---|
| 2014-01-27 | AD34958 | ND |
| 2014-01-27 | AD34962 | ND |
| 2015-02-03 | AD51022 | ND |
| 2015-02-03 | AD51025 | ND |
| 2016-01-27 | AD69775 | ND |
| 2016-01-27 | AD69773 | ND |
| 2017-02-07 | AD89489 | ND |
| 2017-02-07 | AD89487 | ND |
| 2018-01-24 | AE06533 | ND |
| 2018-01-29 | AE06721 | ND |
| 2019-02-20 | AE26036 | ND |
| 2019-02-27 | AE26430 | ND |