Diquat
Far West Water & Sewer Inc
Diquat is a herbicide used on potato crops and aquatic weeds.
20
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 | ND | 10 | 0 | ND |
| 2016 | ND | 10 | 0 | ND |
| 2017 | N/A | 0 | 0 | N/A |
| 2018 | N/A | 0 | 0 | N/A |
| 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 |
|---|---|---|
| 2015-05-18 | 550-45037-1 | ND |
| 2015-05-18 | 550-45036-1 | ND |
| 2015-05-18 | 550-45035-1 | ND |
| 2015-05-25 | 550-45319-1 | ND |
| 2015-05-25 | 550-45318-1 | ND |
| 2015-11-16 | 550-54480-1 | ND |
| 2015-11-16 | 550-54479-1 | ND |
| 2015-11-30 | 550-55075-1S | ND |
| 2015-11-30 | 550-55074-1S | ND |
| 2015-12-06 | 550-55507-1 | ND |
| 2016-01-18 | 550-57438-1 | ND |
| 2016-01-18 | 550-57423-1 | ND |
| 2016-01-25 | 550-57775-1T | ND |
| 2016-01-25 | 550-57774-1T | ND |
| 2016-02-22 | 550-59253-1T | ND |
| 2016-08-22 | 550-68498-2 | ND |
| 2016-08-22 | 550-68498-1 | ND |
| 2016-08-29 | 550-68785-1 | ND |
| 2016-08-29 | 550-68784-1S | ND |
| 2016-09-05 | 550-69042-1 | ND |