Diquat
Sunrise Water Authority
Diquat is a herbicide used on potato crops and aquatic weeds.
24
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 |
|---|---|---|---|---|
| 2013 | N/A | 0 | 0 | N/A |
| 2014 | ND | 10 | 0 | ND |
| 2015 | ND | 1 | 0 | ND |
| 2016 | ND | 1 | 0 | ND |
| 2017 | ND | 12 | 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 |
|---|---|---|
| 2014-09-02 | 1438921-S | ND |
| 2014-09-02 | 1438927-S | ND |
| 2014-09-02 | 1438915-S | ND |
| 2014-09-03 | 1439083-S | ND |
| 2014-09-03 | 1439082-S | ND |
| 2014-11-04 | 1449069-S | ND |
| 2014-11-04 | 1449073-S | ND |
| 2014-11-04 | 1449061-S | ND |
| 2014-11-04 | 1449064-S | ND |
| 2014-11-04 | 1449067-S | ND |
| 2015-10-26 | 530001905-S | ND |
| 2016-02-29 | 606102101-S | ND |
| 2017-06-12 | 716400601-S | ND |
| 2017-06-12 | 716400801-S | ND |
| 2017-06-12 | 716400701-S | ND |
| 2017-06-13 | 716400901-S | ND |
| 2017-06-13 | 716401001-S | ND |
| 2017-06-13 | 716401101-S | ND |
| 2017-09-19 | 726204401-S | ND |
| 2017-09-19 | 726204404-S | ND |
| 2017-09-19 | 726204403-S | ND |
| 2017-09-19 | 726204402-S | ND |
| 2017-09-19 | 726204405-S | ND |
| 2017-09-19 | 726204406-S | ND |