Diquat
City of Inglewood
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 |
---|---|---|---|---|
2014 | ND | 5 | 0 | ND |
2015 | ND | 3 | 0 | ND |
2016 | ND | 2 | 0 | ND |
2017 | ND | 3 | 0 | ND |
2018 | ND | 4 | 0 | ND |
2019 | N/A | 0 | 0 | N/A |
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 |
---|---|---|
2014-03-26 | 9588-013-1030 | ND |
2014-06-26 | 9588-013-1040 | ND |
2014-08-27 | 9588-002-1120 | ND |
2014-12-16 | 9588-018-1120 | ND |
2014-12-16 | 9588-002-1050 | ND |
2015-02-19 | 9588-002-1036 | ND |
2015-02-19 | 9588-018-1108 | ND |
2015-12-11 | 9588-001-1000 | ND |
2016-06-30 | 9588-001-1050 | ND |
2016-11-10 | 9588-001-1030 | ND |
2017-02-23 | 9590-001-1205 | ND |
2017-11-29 | 9590-002-1145 | ND |
2017-11-29 | 9590-001-1313 | ND |
2018-02-14 | 9588-018-1040 | ND |
2018-02-14 | 9588-002-1020 | ND |
2018-05-23 | 9588-018-1030 | ND |
2018-12-13 | 9588-013-0945 | ND |