Diquat
Manhasset Lakeville WD
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 | 4 | 0 | ND |
2015 | ND | 2 | 0 | ND |
2016 | N/A | 0 | 0 | N/A |
2017 | ND | 5 | 0 | ND |
2018 | ND | 6 | 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 |
---|---|---|
2014-06-24 | 1406G99-001-SOCS | ND |
2014-06-24 | 1406G99-004-SOCS | ND |
2014-06-26 | 1406J71-003-SOCS | ND |
2014-06-30 | 1406L49-001-SOCS | ND |
2015-12-22 | 1512H65-002-SOCS | ND |
2015-12-22 | 1512H65-004-SOCS | ND |
2017-01-20 | 709604001 | ND |
2017-01-25 | 709899001 | ND |
2017-03-29 | 7014449001 | ND |
2017-06-26 | 7022424001-SOCS | ND |
2017-06-30 | 7022905002-SOCS | ND |
2018-11-28 | 7072243001-SOCS | ND |
2018-11-28 | 7072243002-SOCS | ND |
2018-12-04 | 7072991001-SOCS | ND |
2018-12-06 | 7073139002-SOCS | ND |
2018-12-06 | 7073139001-SOCS | ND |
2018-12-18 | 70 | ND |