Diquat
Springfield Utility Board
Diquat is a herbicide used on potato crops and aquatic weeds.
17
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 | 1 | 0 | ND |
| 2015 | ND | 11 | 0 | ND |
| 2016 | ND | 1 | 0 | ND |
| 2017 | ND | 4 | 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 |
|---|---|---|
| 2014-04-07 | 140418301-S | ND |
| 2015-04-29 | 1504B94001-S | ND |
| 2015-07-13 | 1507499001-S | ND |
| 2015-07-14 | 1507597001-S | ND |
| 2015-07-14 | 1507597002-S | ND |
| 2015-07-14 | 1507597003-S | ND |
| 2015-07-14 | 1507597004-S | ND |
| 2015-10-05 | 1510126002-S | ND |
| 2015-10-05 | 1510126004-S | ND |
| 2015-10-05 | 1510126003-S | ND |
| 2015-10-05 | 1510126001-S | ND |
| 2015-10-07 | 1510217001-S | ND |
| 2016-01-07 | 1601671-S | ND |
| 2017-08-02 | 1708103002-S | ND |
| 2017-09-08 | 1709285001-S | ND |
| 2017-10-11 | 1710495001-S | ND |
| 2017-10-11 | 1710495002-S | ND |