Diquat
Southington Water Department
Diquat is a herbicide used on potato crops and aquatic weeds.
28
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 |
|---|---|---|---|---|
| 2014 | ND | 16 | 0 | ND |
| 2015 | N/A | 0 | 0 | N/A |
| 2016 | N/A | 0 | 0 | N/A |
| 2017 | N/A | 0 | 0 | N/A |
| 2018 | ND | 9 | 0 | ND |
| 2019 | ND | 3 | 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 |
|---|---|---|
| 2014-06-25 | E406O95-1SOC | ND |
| 2014-06-25 | E406O96-1SOC | ND |
| 2014-06-25 | E406O97-1SOC | ND |
| 2014-06-25 | E406P00-1SOC | ND |
| 2014-06-25 | E406P01-1SOC | ND |
| 2014-06-25 | E406P02-1SOC | ND |
| 2014-06-25 | E406P03-1SOC | ND |
| 2014-06-25 | E406O94-1SOC | ND |
| 2014-08-06 | E408627-1SOC | ND |
| 2014-08-06 | E408628-1SOC | ND |
| 2014-08-06 | E408624-1SOC | ND |
| 2014-08-06 | E408623-1SOC | ND |
| 2014-08-06 | E408622-1SOC | ND |
| 2014-08-06 | E408621-1SOC | ND |
| 2014-08-06 | E408620-1SOC | ND |
| 2014-08-06 | E408619-1SOC | ND |
| 2018-02-14 | D8B1092-01SOC | ND |
| 2018-05-15 | D8E1902-01SOC | ND |
| 2018-05-17 | D8E1907-01SOC | ND |
| 2018-05-17 | D8E1910-01SOC | ND |
| 2018-05-17 | D8E1909-01SOC | ND |
| 2018-05-17 | D8E1904-01SOC | ND |
| 2018-05-17 | D8E1911-01SOC | ND |
| 2018-08-16 | D8H2012-01SOC | ND |
| 2018-11-14 | D8K1686-01SOC | ND |
| 2019-01-30 | D9A2485-01SOC | ND |
| 2019-02-13 | D9B1229-01SOC | ND |
| 2019-08-14 | D9H1817-01SOC | ND |