Diquat
Loxley, Town of
Diquat is a herbicide used on potato crops and aquatic weeds.
12
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 | 2 | 0 | ND |
2015 | ND | 4 | 0 | ND |
2016 | N/A | 0 | 0 | N/A |
2017 | ND | 2 | 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 |
---|---|---|
2014-03-25 | 140325052-1 | ND |
2014-09-15 | 140917051-1 | ND |
2015-04-01 | 150403011-1 | ND |
2015-04-01 | 150403011-2 | ND |
2015-09-22 | 150923028-1 | ND |
2015-09-22 | 150923028-2 | ND |
2017-03-29 | 170329060-1 | ND |
2017-10-31 | 171101096-1 | ND |
2018-03-22 | 180322031-001 | ND |
2018-03-22 | 180322031-2 | ND |
2018-09-20 | 18090622-002H | ND |
2018-09-20 | 18090622-001H | ND |