Diquat
Norman
Diquat is a herbicide used on potato crops and aquatic weeds.
Testing results - average by year
Year | Average result | Samples taken | Detections | Range of results |
---|---|---|---|---|
2013 | N/A | 0 | 0 | N/A |
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 | 108 | 0 | ND |
2019 | ND | 54 | 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 |
---|---|---|
2018-01-03 | 3847203 | ND |
2018-01-03 | 3847250 | ND |
2018-01-03 | 3847259 | ND |
2018-01-03 | 3847268 | ND |
2018-01-03 | 3847277 | ND |
2018-01-09 | 3850192 | ND |
2018-01-09 | 3850202 | ND |
2018-01-09 | 3850216 | ND |
2018-01-16 | 3853821 | ND |
2018-01-16 | 3853830 | ND |
2018-01-16 | 3853851 | ND |
2018-01-16 | 3853861 | ND |
2018-01-16 | 3853895 | ND |
2018-01-22 | 3856686 | ND |
2018-01-22 | 3856738 | ND |
2018-01-22 | 3856754 | ND |
2018-01-24 | 3858392 | ND |
2018-01-29 | 3860647 | ND |
2018-01-29 | 3860689 | ND |
2018-01-29 | 3860698 | ND |
2018-01-30 | 3861543 | ND |
2018-02-07 | 3867320 | ND |
2018-02-07 | 3867329 | ND |
2018-02-07 | 3867380 | ND |
2018-02-14 | 3872975 | ND |
2018-02-15 | 3873624 | ND |
2018-02-22 | 3878274 | ND |
2018-04-02 | 3902019 | ND |
2018-04-02 | 3902032 | ND |
2018-04-03 | 3903125 | ND |
2018-04-03 | 3903134 | ND |
2018-04-05 | 3905304 | ND |
2018-04-05 | 3905315 | ND |
2018-04-05 | 3905326 | ND |
2018-04-09 | 3907188 | ND |
2018-04-16 | 3913528 | ND |
2018-04-16 | 3913537 | ND |
2018-04-18 | 3915867 | ND |
2018-04-18 | 3915905 | ND |
2018-04-18 | 3915915 | ND |
2018-04-26 | 3922067 | ND |
2018-04-26 | 3922076 | ND |
2018-04-26 | 3922085 | ND |
2018-04-26 | 3922094 | ND |
2018-04-30 | 3924221 | ND |
2018-05-07 | 3930013 | ND |
2018-05-07 | 3930041 | ND |
2018-05-07 | 3930053 | ND |
2018-05-07 | 3930081 | ND |
2018-05-09 | 3933227 | ND |
2018-05-09 | 3933735 | ND |
2018-05-21 | 3942188 | ND |
2018-05-21 | 3942197 | ND |
2018-05-30 | 3949658 | ND |
2018-07-02 | 3977711 | ND |
2018-07-02 | 3978098 | ND |
2018-07-02 | 3979188 | ND |
2018-07-02 | 3980873 | ND |
2018-07-04 | 3980831 | ND |
2018-07-04 | 3980881 | ND |
2018-07-10 | 3984438 | ND |
2018-07-10 | 3984489 | ND |
2018-07-10 | 3984502 | ND |
2018-07-18 | 3993075 | ND |
2018-07-18 | 3993095 | ND |
2018-07-18 | 3993119 | ND |
2018-07-18 | 3993132 | ND |
2018-07-18 | 3995136 | ND |
2018-07-25 | 4001415 | ND |
2018-07-25 | 4001430 | ND |
2018-07-25 | 4001454 | ND |
2018-07-31 | 4006901 | ND |
2018-07-31 | 4006950 | ND |
2018-07-31 | 4007065 | ND |
2018-07-31 | 4007073 | ND |
2018-08-08 | 4016224 | ND |
2018-08-08 | 4016296 | ND |
2018-08-13 | 4020959 | ND |
2018-08-20 | 4029318 | ND |
2018-08-27 | 4036916 | ND |
2018-08-27 | 4036958 | ND |
2018-10-15 | 4089674 | ND |
2018-10-15 | 4089700 | ND |
2018-10-15 | 4089777 | ND |
2018-10-15 | 4090916 | ND |
2018-10-15 | 4090925 | ND |
2018-10-17 | 4092782 | ND |
2018-10-17 | 4092791 | ND |
2018-10-18 | 4095081 | ND |
2018-10-18 | 4095085 | ND |
2018-10-18 | 4095093 | ND |
2018-10-18 | 4095102 | ND |
2018-10-18 | 4099154 | ND |
2018-10-22 | 4099177 | ND |
2018-10-22 | 4099186 | ND |
2018-10-22 | 4099203 | ND |
2018-10-23 | 4099313 | ND |
2018-10-23 | 4099322 | ND |
2018-10-23 | 4099331 | ND |
2018-10-23 | 4099340 | ND |
2018-10-23 | 4099542 | ND |
2018-10-24 | 4100849 | ND |
2018-10-29 | 4104473 | ND |
2018-10-29 | 4104491 | ND |
2018-10-29 | 4104500 | ND |
2018-10-30 | 4105902 | ND |
2018-12-17 | 4152932 | ND |
2018-12-18 | 4154369 | ND |
2019-02-13 | 4197669 | ND |
2019-02-13 | 4197750 | ND |
2019-02-13 | 4197835 | ND |
2019-04-02 | 4246269 | ND |
2019-04-02 | 4246278 | ND |
2019-04-02 | 4246319 | ND |
2019-04-02 | 4246328 | ND |
2019-04-03 | 4247838 | ND |
2019-04-03 | 4247854 | ND |
2019-04-03 | 4247876 | ND |
2019-04-04 | 4249670 | ND |
2019-04-04 | 4249681 | ND |
2019-04-04 | 4249691 | ND |
2019-04-08 | 4253358 | ND |
2019-04-08 | 4253367 | ND |
2019-04-08 | 4253376 | ND |
2019-04-09 | 4254451 | ND |
2019-04-09 | 4254695 | ND |
2019-04-09 | 4254704 | ND |
2019-04-10 | 4256580 | ND |
2019-04-10 | 4256593 | ND |
2019-04-10 | 4256604 | ND |
2019-04-10 | 4256615 | ND |
2019-04-17 | 4264159 | ND |
2019-04-18 | 4266094 | ND |
2019-04-29 | 4276345 | ND |
2019-05-09 | 4289499 | ND |
2019-07-29 | 4368517 | ND |
2019-08-15 | 4388905 | ND |
2019-09-11 | 4417906 | ND |
2019-10-10 | 4452603 | ND |
2019-10-10 | 4452614 | ND |
2019-10-10 | 4452627 | ND |
2019-10-15 | 4458268 | ND |
2019-10-15 | 4458277 | ND |
2019-10-15 | 4458327 | ND |
2019-10-15 | 4458337 | ND |
2019-10-15 | 4458445 | ND |
2019-10-17 | 4460163 | ND |
2019-11-06 | 4478561 | ND |
2019-11-06 | 4478672 | ND |
2019-11-06 | 4478696 | ND |
2019-11-18 | 4489491 | ND |
2019-11-18 | 4489500 | ND |
2019-11-21 | 4494834 | ND |
2019-11-21 | 4495318 | ND |
2019-12-05 | 4505841 | ND |
2019-12-05 | 4505851 | ND |
2019-12-10 | 4510445 | ND |
2019-12-10 | 4510454 | ND |
2019-12-10 | 4510471 | ND |
2019-12-10 | 4510524 | ND |
2019-12-17 | 4517948 | ND |
2019-12-20 | 4522415 | ND |