Diquat
Town of Gilbert
Diquat is a herbicide used on potato crops and aquatic weeds.
63
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 | 2 | 0 | ND |
| 2015 | ND | 20 | 0 | ND |
| 2016 | ND | 8 | 0 | ND |
| 2017 | ND | 2 | 0 | ND |
| 2018 | ND | 22 | 0 | ND |
| 2019 | ND | 9 | 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 |
|---|---|---|
| 2014-01-27 | 201401270088S | ND |
| 2014-10-07 | 201410070504S | ND |
| 2015-01-13 | 201501130297S | ND |
| 2015-01-14 | 201501140577S | ND |
| 2015-01-27 | 201501270263S | ND |
| 2015-01-28 | 201501280380S | ND |
| 2015-01-28 | 201501280358S | ND |
| 2015-02-03 | 201502030356S | ND |
| 2015-02-05 | 201502050484S | ND |
| 2015-02-10 | 201502100324S | ND |
| 2015-02-17 | 201502170339S | ND |
| 2015-02-18 | 201502180275S | ND |
| 2015-02-24 | 201502240346S | ND |
| 2015-02-24 | 201502240342S | ND |
| 2015-05-13 | 201505130231S | ND |
| 2015-07-08 | 201507080265S | ND |
| 2015-07-21 | 201507220465S | ND |
| 2015-07-28 | 201507260234S | ND |
| 2015-08-17 | 201508170183S | ND |
| 2015-09-10 | 201509100492S | ND |
| 2015-09-10 | 201509100491S | ND |
| 2015-09-10 | 201509100490S | ND |
| 2016-01-05 | 201601070012S | ND |
| 2016-01-06 | 201601070016S | ND |
| 2016-01-26 | 201601260359S | ND |
| 2016-05-31 | 201605310476S | ND |
| 2016-07-06 | 201607060612S | ND |
| 2016-07-06 | 201607060594S | ND |
| 2016-07-20 | 201607200605S | ND |
| 2016-10-18 | 201610180285S | ND |
| 2017-01-04 | 201701040825S | ND |
| 2017-07-27 | 201707280101S | ND |
| 2018-01-16 | 201801160487S | ND |
| 2018-01-24 | 201801240722S | ND |
| 2018-01-24 | 201801240714S | ND |
| 2018-01-29 | 201801290262S | ND |
| 2018-01-29 | 201801290253S | ND |
| 2018-01-29 | 201801290248S | ND |
| 2018-02-26 | 201802260223S | ND |
| 2018-02-27 | 201802270506S | ND |
| 2018-03-20 | 201803200265S | ND |
| 2018-05-17 | 201805170729S | ND |
| 2018-06-13 | 201806131022S | ND |
| 2018-07-30 | 201807300086S | ND |
| 2018-07-31 | 201807310397S | ND |
| 2018-07-31 | 201807310394S | ND |
| 2018-08-01 | 201808010288S | ND |
| 2018-08-01 | 201808010286S | ND |
| 2018-08-22 | 201808220261S | ND |
| 2018-08-28 | 201808280711S | ND |
| 2018-08-29 | 201808290654S | ND |
| 2018-08-29 | 201808290652S | ND |
| 2018-11-28 | 201811280390S | ND |
| 2018-12-03 | 201812040072S | ND |
| 2019-01-09 | 201901090388S | ND |
| 2019-01-15 | 201901150228S | ND |
| 2019-03-25 | 201903250206S | ND |
| 2019-04-29 | 201904290297S | ND |
| 2019-04-29 | 201904290294S | ND |
| 2019-07-10 | 201907100660S | ND |
| 2019-07-17 | 201907170335S | ND |
| 2019-07-30 | 201907300444S | ND |
| 2019-12-16 | 201912160222S | ND |