Diquat
Doney Park Water
Diquat is a herbicide used on potato crops and aquatic weeds.
28
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 | 12 | 0 | ND |
| 2016 | ND | 2 | 0 | ND |
| 2017 | N/A | 0 | 0 | N/A |
| 2018 | ND | 14 | 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 |
|---|---|---|
| 2015-03-17 | 201503180283SC | ND |
| 2015-03-17 | 201503180283SB | ND |
| 2015-03-17 | 201503180283SA | ND |
| 2015-03-17 | 201503180281SC | ND |
| 2015-03-17 | 201503180281SB | ND |
| 2015-03-17 | 201503180281SA | ND |
| 2015-04-28 | 201504290206SC | ND |
| 2015-04-28 | 201504290206SB | ND |
| 2015-04-28 | 201504290206SA | ND |
| 2015-04-28 | 201504290204SC | ND |
| 2015-04-28 | 201504290204SB | ND |
| 2015-04-28 | 201504290204SA | ND |
| 2016-04-05 | 201604060136S | ND |
| 2016-09-29 | 201609300018S | ND |
| 2018-04-17 | 201804180326SE | ND |
| 2018-04-17 | 201804180326SD | ND |
| 2018-04-17 | 201804180326SC | ND |
| 2018-04-17 | 201804180326SB | ND |
| 2018-04-17 | 201804180326SA | ND |
| 2018-06-13 | 201806140290S | ND |
| 2018-08-01 | 201808020181SC | ND |
| 2018-08-01 | 201808020181SB | ND |
| 2018-08-01 | 201808020181SA | ND |
| 2018-08-01 | 201808020177SC | ND |
| 2018-08-01 | 201808020177SB | ND |
| 2018-08-01 | 201808020177SA | ND |
| 2018-08-28 | 201808290304S | ND |
| 2018-10-30 | 201810310048S | ND |