Diquat
Brundidge Water Department
Diquat is a herbicide used on potato crops and aquatic weeds.
18
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 | N/A | 0 | 0 | N/A |
| 2016 | ND | 9 | 0 | ND |
| 2017 | N/A | 0 | 0 | N/A |
| 2018 | N/A | 0 | 0 | N/A |
| 2019 | ND | 9 | 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 |
|---|---|---|
| 2016-04-05 | 1110-040516-SOC- | ND |
| 2016-04-05 | 1110-040516-SOC- | ND |
| 2016-04-05 | 1110-040516-SOC- | ND |
| 2016-08-02 | 111008022016-2 | ND |
| 2016-08-02 | 111008022016-1 | ND |
| 2016-08-02 | 1110-080216-2 | ND |
| 2016-08-02 | 1110-080216-1 | ND |
| 2016-08-02 | 111008022016-3 | ND |
| 2016-08-02 | 1110-080216-3 | ND |
| 2019-04-16 | 188999-01SOC | ND |
| 2019-04-16 | 188997-01SOC | ND |
| 2019-04-16 | 188998-01SOC | ND |
| 2019-08-21 | 194261-01ASOC | ND |
| 2019-08-21 | 194262-01SOC | ND |
| 2019-08-21 | 194261-01SOC | ND |
| 2019-08-21 | 194260-01ASOC | ND |
| 2019-08-21 | 194260-01SOC | ND |
| 2019-08-21 | 194262-01ASOC | ND |