Diquat
Slippery Rock Municipal Authority
Diquat is a herbicide used on potato crops and aquatic weeds.
14
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 | 6 | 0 | ND |
| 2015 | N/A | 0 | 0 | N/A |
| 2016 | ND | 1 | 0 | ND |
| 2017 | ND | 5 | 0 | ND |
| 2018 | ND | 2 | 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 |
|---|---|---|
| 2014-03-13 | 14031358-01 | ND |
| 2014-06-19 | 14062548-01 | ND |
| 2014-06-19 | 14062550-01 | ND |
| 2014-09-11 | 14091213-01 | ND |
| 2014-09-11 | 14091217-01 | ND |
| 2014-12-11 | 14121420-01 | ND |
| 2016-12-07 | 15449592 | ND |
| 2017-03-22 | 15869897 | ND |
| 2017-06-01 | 16344307 | ND |
| 2017-06-08 | 16344336 | ND |
| 2017-09-27 | 16810215 | ND |
| 2017-09-27 | 16810194 | ND |
| 2018-03-15 | 2302800001 | ND |
| 2018-09-27 | 2341473001 | ND |