Diquat
Epcor Water - Agua Fria
Diquat is a herbicide used on potato crops and aquatic weeds.
41
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 |
|---|---|---|---|---|
| 2013 | N/A | 0 | 0 | N/A |
| 2014 | ND | 18 | 0 | ND |
| 2015 | ND | 3 | 0 | ND |
| 2016 | ND | 1 | 0 | ND |
| 2017 | ND | 17 | 0 | ND |
| 2018 | ND | 1 | 0 | ND |
| 2019 | ND | 1 | 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 |
|---|---|---|
| 2014-02-20 | 4021662-01S | ND |
| 2014-03-17 | 4031321-01 | ND |
| 2014-03-18 | 40631423-02 | ND |
| 2014-03-18 | 4031423-03 | ND |
| 2014-03-18 | 4031423-01S | ND |
| 2014-03-19 | 4031531-01S | ND |
| 2014-05-08 | 4050765-03S | ND |
| 2014-06-24 | 4061967-01S | ND |
| 2014-08-05 | 4080428-03S | ND |
| 2014-08-05 | 4080428-01S | ND |
| 2014-08-05 | 4080428-02S | ND |
| 2014-08-05 | 4080428-04S | ND |
| 2014-08-06 | 4080551-04 | ND |
| 2014-08-06 | 4080551-03S | ND |
| 2014-08-06 | 4080551-02S | ND |
| 2014-08-06 | 4080551-01S | ND |
| 2014-11-18 | 4111490-02S | ND |
| 2014-11-18 | 4111490-01S | ND |
| 2015-03-05 | 5030509-01S | ND |
| 2015-03-05 | 201501280358A | ND |
| 2015-12-03 | 5120407-02S | ND |
| 2016-12-01 | 6120081-02 | ND |
| 2017-03-13 | 7031038-02S | ND |
| 2017-03-13 | 7031038-01S | ND |
| 2017-03-16 | 7031480-02S | ND |
| 2017-03-16 | 7031480-01S | ND |
| 2017-03-20 | 7031693-02T | ND |
| 2017-03-20 | 7031693-01T | ND |
| 2017-03-22 | 7031982-01S | ND |
| 2017-06-05 | 7060554-02 | ND |
| 2017-08-08 | 7080866-03SOC | ND |
| 2017-08-08 | 7080866-01SOC | ND |
| 2017-08-08 | 7080866-02SOC | ND |
| 2017-08-09 | 7081006-03SOC | ND |
| 2017-08-09 | 7081006-02SOC | ND |
| 2017-08-09 | 7081006-01SOC | ND |
| 2017-08-21 | 7082146-01SOC | ND |
| 2017-12-05 | 7120489-04 | ND |
| 2017-12-05 | 7120469-03 | ND |
| 2018-12-12 | 18L1462-01 | ND |
| 2019-10-10 | 19J1493-01 | ND |