Diquat
Southern Okla Water Corp
Diquat is a herbicide used on potato crops and aquatic weeds.
60
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 | 40 | 0 | ND |
| 2019 | ND | 20 | 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 |
|---|---|---|
| 2018-01-30 | 1801686 | ND |
| 2018-01-30 | 1801685 | ND |
| 2018-01-30 | 1801684 | ND |
| 2018-01-30 | 1801683 | ND |
| 2018-02-06 | 1802218 | ND |
| 2018-02-06 | 1802217 | ND |
| 2018-02-06 | 1802215 | ND |
| 2018-02-13 | 1802465 | ND |
| 2018-02-13 | 1802464 | ND |
| 2018-02-27 | 1802749 | ND |
| 2018-04-10 | 1804401 | ND |
| 2018-04-10 | 1804400 | ND |
| 2018-04-24 | 1804704 | ND |
| 2018-04-24 | 1804703 | ND |
| 2018-05-15 | 1805520 | ND |
| 2018-05-15 | 1805519 | ND |
| 2018-06-19 | 1806560 | ND |
| 2018-06-19 | 1806559 | ND |
| 2018-06-26 | 1806728 | ND |
| 2018-06-26 | 1806727 | ND |
| 2018-07-17 | 1807552 | ND |
| 2018-07-17 | 1807551 | ND |
| 2018-08-07 | 1808226 | ND |
| 2018-08-07 | 1808225 | ND |
| 2018-08-21 | 18081130 | ND |
| 2018-08-21 | 18081129 | ND |
| 2018-09-13 | 1809537 | ND |
| 2018-09-13 | 1809540 | ND |
| 2018-09-13 | 1809539 | ND |
| 2018-09-13 | 1809538 | ND |
| 2018-10-09 | 1810353 | ND |
| 2018-10-09 | 1810352 | ND |
| 2018-10-16 | 1810469 | ND |
| 2018-10-16 | 1810468 | ND |
| 2018-11-13 | 1811422 | ND |
| 2018-11-13 | 1811421 | ND |
| 2018-11-27 | 1811683 | ND |
| 2018-11-27 | 1811684 | ND |
| 2018-12-04 | 1812120 | ND |
| 2018-12-04 | 1812119 | ND |
| 2019-10-01 | 1910025 | ND |
| 2019-10-01 | 1910024 | ND |
| 2019-10-01 | 1910023 | ND |
| 2019-10-01 | 1910022 | ND |
| 2019-11-24 | 1911700 | ND |
| 2019-11-24 | 1911697 | ND |
| 2019-11-24 | 1911698 | ND |
| 2019-11-24 | 1911699 | ND |
| 2019-12-10 | 1912371 | ND |
| 2019-12-10 | 1912370 | ND |
| 2019-12-10 | 1912369 | ND |
| 2019-12-10 | 1912368 | ND |
| 2019-12-10 | 1912367 | ND |
| 2019-12-10 | 1912366 | ND |
| 2019-12-10 | 1912365 | ND |
| 2019-12-10 | 1912364 | ND |
| 2019-12-17 | 1912630 | ND |
| 2019-12-17 | 1912633 | ND |
| 2019-12-17 | 1912632 | ND |
| 2019-12-17 | 1912631 | ND |