Diquat
Birmingham Water Works Board
Diquat is a herbicide used on potato crops and aquatic weeds.
42
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 | 4 | 0 | ND |
| 2015 | ND | 7 | 0 | ND |
| 2016 | ND | 8 | 0 | ND |
| 2017 | ND | 8 | 0 | ND |
| 2018 | ND | 7 | 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 |
|---|---|---|
| 2014-02-10 | 73802102014-2S | ND |
| 2014-02-10 | 73802102014-1S | ND |
| 2014-02-10 | 73802102014-4S | ND |
| 2014-02-10 | 73802102014-3S | ND |
| 2015-02-10 | 73802102015-12 | ND |
| 2015-02-10 | 73802102015-9 | ND |
| 2015-02-10 | 73802102015-10 | ND |
| 2015-02-10 | 73802102015-11 | ND |
| 2015-11-09 | 73811092015-29 | ND |
| 2015-11-09 | 73811092015-30 | ND |
| 2015-11-09 | 73811092015-31 | ND |
| 2016-02-09 | 738-020916-SOC-4 | ND |
| 2016-02-09 | 738-020916-SOC-3 | ND |
| 2016-02-09 | 738-020916-SOC-1 | ND |
| 2016-02-09 | 738-020916-SOC-2 | ND |
| 2016-08-09 | 7380892016-4 | ND |
| 2016-08-09 | 7380892016-2 | ND |
| 2016-08-09 | 7380892016-3 | ND |
| 2016-08-09 | 7380892016-1 | ND |
| 2017-02-28 | 738-022817-SOC-2 | ND |
| 2017-02-28 | 738-022817-SOC-3 | ND |
| 2017-02-28 | 738-022817-SOC-4 | ND |
| 2017-02-28 | 738-022817-SOC-1 | ND |
| 2017-08-15 | 738-081517-SOC-1 | ND |
| 2017-08-15 | 738-081517-SOC-2 | ND |
| 2017-08-15 | 738-081517-SOC-4 | ND |
| 2017-08-15 | 738-081517-SOC-3 | ND |
| 2018-03-22 | 738-1802-SOC-1 | ND |
| 2018-03-22 | 738-1802-SOC-4 | ND |
| 2018-03-22 | 738-1802-SOC-3 | ND |
| 2018-09-12 | 2018091216-001 | ND |
| 2018-09-12 | 2018091216-004 | ND |
| 2018-09-12 | 2018091216-003 | ND |
| 2018-09-12 | 2018091216-002 | ND |
| 2019-02-28 | 2019022813-001 | ND |
| 2019-02-28 | 2019022813-004 | ND |
| 2019-02-28 | 2019022813-003 | ND |
| 2019-02-28 | 2019022813-002 | ND |
| 2019-09-16 | 2019091611-001 | ND |
| 2019-09-16 | 2019091611-004 | ND |
| 2019-09-16 | 2019091611-003 | ND |
| 2019-09-16 | 2019091611-002 | ND |