Diquat
Morgan City Water System
Diquat is a herbicide used on potato crops and aquatic weeds.
22
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 | 2 | 0 | ND |
| 2015 | ND | 4 | 0 | ND |
| 2016 | ND | 4 | 0 | ND |
| 2017 | ND | 4 | 0 | ND |
| 2018 | ND | 4 | 0 | ND |
| 2019 | ND | 4 | 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 |
|---|---|---|
| 2014-02-03 | AD88684 | ND |
| 2014-02-03 | AD88684 | ND |
| 2015-03-31 | 35181766002 | ND |
| 2015-03-31 | 35181766002 | ND |
| 2015-09-24 | 35208879007 | ND |
| 2015-09-24 | 35208879007 | ND |
| 2016-02-01 | 35227537001 | ND |
| 2016-02-01 | 35227537001 | ND |
| 2016-09-19 | 35266189007 | ND |
| 2016-09-19 | 35266189007 | ND |
| 2017-03-08 | 35299826002 | ND |
| 2017-03-08 | 35299826002 | ND |
| 2017-10-16 | 35342351002 | ND |
| 2017-10-16 | 35342351002 | ND |
| 2018-01-25 | 35370415007 | ND |
| 2018-01-25 | 35370415007 | ND |
| 2018-07-23 | 35406291001 | ND |
| 2018-07-23 | 35406291001 | ND |
| 2019-01-29 | 35445061001 | ND |
| 2019-01-29 | 35445061001 | ND |
| 2019-07-24 | 35484849001 | ND |
| 2019-07-24 | 35484849001 | ND |