Diquat
Redmond Water Department
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 | 14 | 0 | ND |
2015 | N/A | 0 | 0 | N/A |
2016 | N/A | 0 | 0 | N/A |
2017 | ND | 14 | 0 | ND |
2018 | N/A | 0 | 0 | N/A |
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 |
---|---|---|
2014-06-09 | B4F091102-S | ND |
2014-06-09 | B4F091103-S | ND |
2014-06-09 | B4F091104-S | ND |
2014-06-09 | B4F091105-S | ND |
2014-06-09 | B4F091106-S | ND |
2014-06-09 | B4F091107-S | ND |
2014-06-09 | B4F091101-S | ND |
2014-09-10 | B4I101301-S | ND |
2014-09-10 | B4I101302-S | ND |
2014-09-10 | B4I101303-S | ND |
2014-09-15 | B4I150401-S | ND |
2014-09-15 | B4I150402-S | ND |
2014-09-15 | B4I150403-S | ND |
2014-10-20 | B4J200201-S | ND |
2017-02-21 | 1708685-S | ND |
2017-02-21 | 1708666-S | ND |
2017-05-04 | 1723852-S | ND |
2017-05-04 | 1723857-S | ND |
2017-05-31 | 1728864-S | ND |
2017-05-31 | 1728868-S | ND |
2017-06-20 | 1733199-S | ND |
2017-07-27 | 1741510-S | ND |
2017-07-27 | 1741513-S | ND |
2017-08-15 | 1745953-S | ND |
2017-08-15 | 1745954-S | ND |
2017-09-20 | 1755960-S | ND |
2017-10-04 | 1759714-S | ND |
2017-10-04 | 1759741-S | ND |