Diquat
Socorro Water System
Diquat is a herbicide used on potato crops and aquatic weeds.
13
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 | 8 | 0 | ND |
| 2015 | N/A | 0 | 0 | N/A |
| 2016 | ND | 1 | 0 | ND |
| 2017 | ND | 4 | 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 |
|---|---|---|
| 2014-03-19 | 2014009387 | ND |
| 2014-03-19 | 2014009385 | ND |
| 2014-03-19 | 2014009388 | ND |
| 2014-03-19 | 2014009389 | ND |
| 2014-04-09 | 2014012069 | ND |
| 2014-04-09 | 2014012070 | ND |
| 2014-04-09 | 2014012071 | ND |
| 2014-04-09 | 2014012068 | ND |
| 2016-08-25 | 1608G20-001A | ND |
| 2017-03-22 | 1703C17-005 | ND |
| 2017-03-22 | 1703C16-005 | ND |
| 2017-03-22 | 1703C14-005 | ND |
| 2017-03-22 | 1703C15-005 | ND |