Diquat
Jonesboro Water System
Diquat is a herbicide used on potato crops and aquatic weeds.
36
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 | 8 | 0 | ND |
| 2015 | ND | 10 | 0 | ND |
| 2016 | N/A | 0 | 0 | N/A |
| 2017 | ND | 8 | 0 | ND |
| 2018 | ND | 10 | 0 | ND |
| 2019 | N/A | 0 | 0 | N/A |
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 |
|---|---|---|
| 2014-01-28 | 14030000408 | ND |
| 2014-01-28 | 14030000608 | ND |
| 2014-01-28 | 14030001802 | ND |
| 2014-01-28 | 14030000508 | ND |
| 2014-04-15 | 14107000308 | ND |
| 2014-04-15 | 14107000208 | ND |
| 2014-04-15 | 14107000108 | ND |
| 2014-06-10 | 14163003208 | ND |
| 2015-01-21 | 15022006908 | ND |
| 2015-01-21 | 15022007008 | ND |
| 2015-01-21 | 15022006808 | ND |
| 2015-01-21 | 15022007108 | ND |
| 2015-01-21 | 15022006708 | ND |
| 2015-04-21 | 15113013808 | ND |
| 2015-04-21 | 15113013708 | ND |
| 2015-04-21 | 15113014008 | ND |
| 2015-04-21 | 15113013908 | ND |
| 2015-04-21 | 15113014108 | ND |
| 2017-01-30 | 17032000507 | ND |
| 2017-01-30 | 17032000407 | ND |
| 2017-01-30 | 17032000707 | ND |
| 2017-02-07 | 17040002007 | ND |
| 2017-05-03 | 17124005408 | ND |
| 2017-05-03 | 17124005308 | ND |
| 2017-05-03 | 17124005108 | ND |
| 2017-05-03 | 17124005208 | ND |
| 2018-01-11 | 18012001808 | ND |
| 2018-01-11 | 18012001408 | ND |
| 2018-01-11 | 18012001508 | ND |
| 2018-01-11 | 18012001608 | ND |
| 2018-01-11 | 18012001709 | ND |
| 2018-04-10 | 18101009908 | ND |
| 2018-04-10 | 18101009808 | ND |
| 2018-04-10 | 18101009708 | ND |
| 2018-04-10 | 18101010008 | ND |
| 2018-04-10 | 18101009608 | ND |