Diquat
Romeoville
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 | N/A | 0 | 0 | N/A |
| 2015 | ND | 13 | 0 | ND |
| 2016 | N/A | 0 | 0 | N/A |
| 2017 | ND | 2 | 0 | ND |
| 2018 | ND | 12 | 0 | ND |
| 2019 | ND | 1 | 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 |
|---|---|---|
| 2015-02-23 | 1502D88-006A | ND |
| 2015-02-23 | 1502D88-009A | ND |
| 2015-02-23 | 1502D88-012A | ND |
| 2015-02-23 | 1502D88-015A | ND |
| 2015-02-23 | 1502D88-018A | ND |
| 2015-02-23 | 1502D88-003A | ND |
| 2015-05-27 | 1505L02-003A | ND |
| 2015-05-27 | 1505L02-006A | ND |
| 2015-05-27 | 1505L02-009A | ND |
| 2015-05-27 | 1505L02-012A | ND |
| 2015-05-27 | 1505L02-015A | ND |
| 2015-05-27 | 1505L02-018A | ND |
| 2015-08-10 | 1508663-001A | ND |
| 2017-05-03 | 1705343-003A | ND |
| 2017-07-19 | 1707E64-003A | ND |
| 2018-01-29 | 1801H09-003A | ND |
| 2018-01-29 | 1801H09-006A | ND |
| 2018-01-29 | 1801H09-009A | ND |
| 2018-01-29 | 1801H09-012A | ND |
| 2018-01-29 | 1801H09-015A | ND |
| 2018-01-29 | 1801H09-018A | ND |
| 2018-04-19 | 1804E46-003A | ND |
| 2018-04-19 | 1804E46-006A | ND |
| 2018-04-19 | 1804E46-009A | ND |
| 2018-04-19 | 1804E46-012A | ND |
| 2018-04-19 | 1804E46-015A | ND |
| 2018-04-19 | 1804E46-018A | ND |
| 2019-12-09 | 1911G96-001_SOC2 | ND |