Diquat
Mineola
Diquat is a herbicide used on potato crops and aquatic weeds.
23
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 |
|---|---|---|---|---|
| 2013 | N/A | 0 | 0 | N/A |
| 2014 | ND | 6 | 0 | ND |
| 2015 | ND | 4 | 0 | ND |
| 2016 | ND | 3 | 0 | ND |
| 2017 | ND | 5 | 0 | ND |
| 2018 | N/A | 0 | 0 | N/A |
| 2019 | ND | 5 | 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 |
|---|---|---|
| 2014-04-04 | 1404377-001-SOCS | ND |
| 2014-04-04 | 1404377-002-SOCS | ND |
| 2014-04-04 | 1404377-003-SOCS | ND |
| 2014-04-04 | 1404377-004-SOCS | ND |
| 2014-08-25 | 1408H88-001-SOCS | ND |
| 2014-11-20 | 1411E39-001-SOCS | ND |
| 2015-07-29 | 1507L42-004-SOCS | ND |
| 2015-07-29 | 1507L42-002-SOCS | ND |
| 2015-07-29 | 1507L42-005-SOCS | ND |
| 2015-07-29 | 1507L42-003-SOCS | ND |
| 2016-10-13 | 702147002-SOCS | ND |
| 2016-10-13 | 702147004-SOCS | ND |
| 2016-10-13 | 702147003-SOCS | ND |
| 2017-09-19 | 7030368003 | ND |
| 2017-09-19 | 7030368004 | ND |
| 2017-09-19 | 7030368002 | ND |
| 2017-09-19 | 7030368001 | ND |
| 2017-09-21 | 7030664001 | ND |
| 2019-02-19 | 7080056001 | ND |
| 2019-02-19 | 7080024001 | ND |
| 2019-02-20 | 7080180001 | ND |
| 2019-02-20 | 7080179001 | ND |
| 2019-04-30 | 7087688001 | ND |