Diquat
Rockford
Diquat is a herbicide used on potato crops and aquatic weeds.
41
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 | 16 | 0 | ND |
| 2015 | ND | 2 | 0 | ND |
| 2016 | ND | 3 | 0 | ND |
| 2017 | ND | 16 | 0 | ND |
| 2018 | ND | 2 | 0 | ND |
| 2019 | ND | 2 | 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 |
|---|---|---|
| 2014-01-22 | 4012700-01 | ND |
| 2014-01-22 | 4012700-02 | ND |
| 2014-01-27 | 4013503-02 | ND |
| 2014-01-28 | 4013503-01 | ND |
| 2014-02-18 | 4022291-01 | ND |
| 2014-02-18 | 4022289-01 | ND |
| 2014-03-25 | 4033199-01 | ND |
| 2014-04-21 | 4043529-05 | ND |
| 2014-04-21 | 4043529-04 | ND |
| 2014-04-21 | 4043529-02 | ND |
| 2014-04-22 | 4043529-06 | ND |
| 2014-04-22 | 4043529-03 | ND |
| 2014-04-23 | 4043529-01 | ND |
| 2014-04-29 | 4044304-01 | ND |
| 2014-10-28 | 4104356-01 | ND |
| 2014-12-12 | 4122805-01 | ND |
| 2015-02-06 | 5021724-01 | ND |
| 2015-04-08 | 5041270-01 | ND |
| 2016-01-06 | 6010756-01 | ND |
| 2016-04-13 | 6042243-01 | ND |
| 2016-12-14 | 6122211-01 | ND |
| 2017-01-06 | 7011622-01 | ND |
| 2017-01-13 | 7012600-01 | ND |
| 2017-01-13 | 7012603-01 | ND |
| 2017-01-20 | 7013468-01 | ND |
| 2017-02-15 | 7022428-01 | ND |
| 2017-03-08 | 7031384-01 | ND |
| 2017-06-02 | 7061425-01 | ND |
| 2017-06-02 | 7061425-03 | ND |
| 2017-06-09 | 7062750-02 | ND |
| 2017-06-09 | 7062750-01 | ND |
| 2017-06-09 | 7062750-03 | ND |
| 2017-06-09 | 7062750-05 | ND |
| 2017-06-28 | 7065205-03 | ND |
| 2017-06-28 | 7065205-01 | ND |
| 2017-08-04 | 7082231-01 | ND |
| 2017-12-06 | 7121184-03 | ND |
| 2018-02-02 | 8021162-01 | ND |
| 2018-06-12 | 8062506-01 | ND |
| 2019-06-07 | 9062358-01 | ND |
| 2019-07-16 | 9073726-01 | ND |