Diquat
Del City
Diquat is a herbicide used on potato crops and aquatic weeds.
54
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 | N/A | 0 | 0 | N/A |
| 2016 | N/A | 0 | 0 | N/A |
| 2017 | N/A | 0 | 0 | N/A |
| 2018 | ND | 36 | 0 | ND |
| 2019 | ND | 18 | 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 |
|---|---|---|
| 2018-02-27 | 3881629 | ND |
| 2018-02-27 | 3881620 | ND |
| 2018-02-27 | 3881611 | ND |
| 2018-03-07 | 3886272 | ND |
| 2018-03-07 | 3886263 | ND |
| 2018-03-08 | 3887093 | ND |
| 2018-03-08 | 3887084 | ND |
| 2018-03-15 | 3892188 | ND |
| 2018-03-15 | 3892179 | ND |
| 2018-04-26 | 3922015 | ND |
| 2018-05-03 | 3927867 | ND |
| 2018-05-03 | 3927858 | ND |
| 2018-05-31 | 3950123 | ND |
| 2018-05-31 | 3950113 | ND |
| 2018-06-06 | 3955060 | ND |
| 2018-06-06 | 3954661 | ND |
| 2018-06-21 | 3969634 | ND |
| 2018-06-21 | 3969625 | ND |
| 2018-08-28 | 4039475 | ND |
| 2018-08-28 | 4039422 | ND |
| 2018-08-28 | 4039392 | ND |
| 2018-08-30 | 4042700 | ND |
| 2018-08-30 | 4042691 | ND |
| 2018-08-30 | 4042674 | ND |
| 2018-09-05 | 4047097 | ND |
| 2018-09-05 | 4047465 | ND |
| 2018-09-05 | 4047106 | ND |
| 2018-10-25 | 4102021 | ND |
| 2018-10-25 | 4102013 | ND |
| 2018-10-25 | 4102003 | ND |
| 2018-10-25 | 4101967 | ND |
| 2018-11-01 | 4108725 | ND |
| 2018-11-01 | 4108717 | ND |
| 2018-11-01 | 4108709 | ND |
| 2018-11-07 | 4115031 | ND |
| 2018-11-07 | 4115023 | ND |
| 2019-05-01 | 4280237 | ND |
| 2019-05-01 | 4280249 | ND |
| 2019-05-01 | 4280263 | ND |
| 2019-05-01 | 4280275 | ND |
| 2019-05-08 | 4288066 | ND |
| 2019-05-08 | 4288057 | ND |
| 2019-05-08 | 4287882 | ND |
| 2019-05-08 | 4287789 | ND |
| 2019-06-05 | 4315240 | ND |
| 2019-12-16 | 4516143 | ND |
| 2019-12-16 | 4516134 | ND |
| 2019-12-16 | 4516125 | ND |
| 2019-12-16 | 4516116 | ND |
| 2019-12-17 | 4517982 | ND |
| 2019-12-17 | 4517933 | ND |
| 2019-12-17 | 4517924 | ND |
| 2019-12-17 | 4517903 | ND |
| 2019-12-19 | 4521462 | ND |