Diquat
Old Forty West Motel
Diquat is a herbicide used on potato crops and aquatic weeds.
11
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 | 2 | 0 | ND |
| 2017 | ND | 4 | 0 | ND |
| 2018 | ND | 1 | 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 |
|---|---|---|
| 2016-12-20 | 201612220442 | ND |
| 2016-12-20 | 201612220440 | ND |
| 2017-06-12 | A7F1283-01 | ND |
| 2017-08-30 | A7H3451-01 | ND |
| 2017-10-10 | A7J1422-01 | ND |
| 2017-10-10 | A7J1413-01 | ND |
| 2018-03-05 | A8C0644-01 | ND |
| 2019-03-19 | A9C2286-01 | ND |
| 2019-04-09 | A9D1608-01A | ND |
| 2019-07-15 | A9G2613-01 | ND |
| 2019-12-18 | A9L2299-01 | ND |