Diquat
City of Hastings
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 | 3 | 0 | ND |
2015 | N/A | 0 | 0 | N/A |
2016 | ND | 1 | 0 | ND |
2017 | N/A | 0 | 0 | N/A |
2018 | ND | 10 | 0 | ND |
2019 | ND | 8 | 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 |
---|---|---|
2014-04-14 | 295510 | ND |
2014-07-16 | 311767 | ND |
2014-09-23 | 281972 | ND |
2016-04-12 | ND | |
2018-04-16 | 546000 | ND |
2018-04-16 | 545999 | ND |
2018-04-16 | 545998 | ND |
2018-04-16 | 545997 | ND |
2018-04-16 | 545996 | ND |
2018-04-16 | 545995 | ND |
2018-08-13 | 561126 | ND |
2018-08-13 | 561127 | ND |
2018-08-13 | 561128 | ND |
2018-08-13 | 561129 | ND |
2019-04-24 | 605002 | ND |
2019-04-24 | 605612 | ND |
2019-04-29 | 605001 | ND |
2019-04-29 | 605000 | ND |
2019-04-29 | 604999 | ND |
2019-07-22 | 621568 | ND |
2019-07-22 | 621333 | ND |
2019-08-12 | 621334 | ND |