Diquat
City of Lodi
Diquat is a herbicide used on potato crops and aquatic weeds.
47
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 | 11 | 0 | ND |
| 2015 | ND | 8 | 0 | ND |
| 2016 | ND | 9 | 0 | ND |
| 2017 | ND | 9 | 0 | ND |
| 2018 | ND | 6 | 0 | ND |
| 2019 | ND | 4 | 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 |
|---|---|---|
| 2014-03-20 | 1982-031-0820 | ND |
| 2014-03-20 | 1982-017-0850 | ND |
| 2014-07-10 | 5802-017-0905 | ND |
| 2014-07-17 | 5802-031-0950 | ND |
| 2014-08-05 | 5802-025-0650 | ND |
| 2014-08-07 | 5802-048-0655 | ND |
| 2014-08-07 | 5802-012-0740 | ND |
| 2014-08-13 | 5802-040-1135 | ND |
| 2014-08-14 | 5802-009-0740 | ND |
| 2014-08-19 | 5802-003-0930 | ND |
| 2014-08-20 | 5802-016-1000 | ND |
| 2015-07-08 | 5802-031-1000 | ND |
| 2015-07-15 | 5802-017-0945 | ND |
| 2015-08-03 | 5802-028-1200 | ND |
| 2015-08-04 | 5802-018-0730 | ND |
| 2015-08-04 | 5802-006-0800 | ND |
| 2015-08-06 | 5802-029-0930 | ND |
| 2015-08-11 | 5802-002-0800 | ND |
| 2015-08-12 | 5802-019-1015 | ND |
| 2016-07-06 | 5802-031-1115 | ND |
| 2016-07-26 | 5802-017-0850 | ND |
| 2016-08-02 | 5802-033-0830 | ND |
| 2016-08-10 | 5802-017-1230 | ND |
| 2016-08-10 | 5802-031-1330 | ND |
| 2016-08-16 | 5802-023-0930 | ND |
| 2016-08-16 | 5802-021-0850 | ND |
| 2016-08-18 | 5802-046-0820 | ND |
| 2016-11-10 | 5802-041-0710 | ND |
| 2017-07-11 | 5802-031-0830 | ND |
| 2017-07-12 | 5802-017-0800 | ND |
| 2017-08-01 | 5802-009-0720 | ND |
| 2017-08-09 | 5802-048-1350 | ND |
| 2017-08-10 | 5802-040-0640 | ND |
| 2017-08-10 | 5802-025-0715 | ND |
| 2017-08-14 | 5802-003-1315 | ND |
| 2017-08-14 | 5802-012-1415 | ND |
| 2017-08-14 | 5802-016-1340 | ND |
| 2018-08-07 | 5802-019-0840 | ND |
| 2018-08-07 | 5802-018-1030 | ND |
| 2018-08-09 | 5802-006-0735 | ND |
| 2018-08-09 | 5802-002-0800 | ND |
| 2018-08-14 | 5802-029-0750 | ND |
| 2018-09-25 | 5802-028-0700 | ND |
| 2019-08-15 | 5802-023-0920 | ND |
| 2019-08-20 | 5802-021-1010 | ND |
| 2019-08-20 | 5802-033-0805 | ND |
| 2019-08-21 | 5802-041-1325 | ND |