Diquat
Doyon Utilities Jber - Richardson
Diquat is a herbicide used on potato crops and aquatic weeds.
27
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 | N/A | 0 | 0 | N/A |
| 2015 | ND | 12 | 0 | ND |
| 2016 | ND | 1 | 0 | ND |
| 2017 | ND | 4 | 0 | ND |
| 2018 | ND | 8 | 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 |
|---|---|---|
| 2015-02-24 | PE*3195336 | ND |
| 2015-02-24 | PE*3195669 | ND |
| 2015-02-24 | PE*3195305 | ND |
| 2015-06-23 | PE*3268441 | ND |
| 2015-06-23 | PE*3268598 | ND |
| 2015-06-23 | PE*3268613 | ND |
| 2015-09-14 | PE*3322322 | ND |
| 2015-09-14 | PE*3322333 | ND |
| 2015-09-14 | PE*3322350 | ND |
| 2015-12-07 | PE*3371147 | ND |
| 2015-12-07 | PE*3371160 | ND |
| 2015-12-07 | PE*3371170 | ND |
| 2016-03-29 | PE*3422161 | ND |
| 2017-03-06 | PE*3649758 | ND |
| 2017-05-22 | PE*3698675 | ND |
| 2017-08-28 | PE*3767825 | ND |
| 2017-10-11 | PE*3797937 | ND |
| 2018-01-29 | PE*3861793 | ND |
| 2018-01-29 | PE*3860526 | ND |
| 2018-06-25 | PE*3973217 | ND |
| 2018-06-26 | PE*3975413 | ND |
| 2018-08-21 | PE*4031293 | ND |
| 2018-08-21 | PE*4031324 | ND |
| 2018-10-02 | PE*4075657 | ND |
| 2018-10-02 | PE*4075677 | ND |
| 2019-01-29 | 4185341 | ND |
| 2019-01-29 | 4186386 | ND |