Diquat
Monroe Water System
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 | ND | 2 | 0 | ND |
2015 | ND | 4 | 0 | ND |
2016 | ND | 4 | 0 | ND |
2017 | ND | 4 | 0 | ND |
2018 | ND | 2 | 0 | ND |
2019 | ND | 4 | 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 |
---|---|---|
2014-02-24 | AD89412 | ND |
2014-02-24 | AD89412 | ND |
2015-01-05 | AE00868 | ND |
2015-01-05 | AE00868 | ND |
2015-09-17 | 35207972017 | ND |
2015-09-17 | 35207972017 | ND |
2016-01-11 | 35224622001 | ND |
2016-01-11 | 35224622001 | ND |
2016-09-07 | 35264598003 | ND |
2016-09-07 | 35264598003 | ND |
2017-01-10 | 35288675003 | ND |
2017-01-10 | 35288675003 | ND |
2017-09-25 | 35338816005 | ND |
2017-09-25 | 35338816005 | ND |
2018-07-30 | 35407880001 | ND |
2018-07-30 | 35407880001 | ND |
2019-01-14 | 35442603001 | ND |
2019-01-14 | 35442603001 | ND |
2019-07-31 | 35486743001 | ND |
2019-07-31 | 35486743001 | ND |