Diquat
Chino Basin Desalter Authority - Desalter 2
Diquat is a herbicide used on potato crops and aquatic weeds.
Testing results - average by year
Year | Average result | Samples taken | Detections | Range of results |
---|---|---|---|---|
2014 | ND | 2 | 0 | ND |
2015 | ND | 6 | 0 | ND |
2016 | N/A | 0 | 0 | N/A |
2017 | ND | 3 | 0 | ND |
2018 | ND | 22 | 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 |
---|---|---|
2014-01-22 | 3334-008-1010 | ND |
2014-01-22 | 3334-001-1055 | ND |
2015-01-22 | 3334-002-1035 | ND |
2015-01-22 | 3334-005-0945 | ND |
2015-05-20 | 3334-007-1045 | ND |
2015-08-12 | 3334-007-1200 | ND |
2015-08-13 | 3334-008-0900 | ND |
2015-11-05 | 3334-008-1005 | ND |
2017-01-18 | 3334-001-1110 | ND |
2017-12-22 | 3334-016-0945 | ND |
2017-12-22 | 3334-015-0830 | ND |
2018-01-10 | 3334-010-0900 | ND |
2018-01-10 | 3334-009-1145 | ND |
2018-01-10 | 3334-008-1030 | ND |
2018-01-17 | 3334-001-1045 | ND |
2018-01-17 | 3334-007-0920 | ND |
2018-01-17 | 3334-005-1145 | ND |
2018-01-17 | 3334-002-1150 | ND |
2018-01-17 | 3334-004-0910 | ND |
2018-01-17 | 3334-003-1050 | ND |
2018-03-28 | 3334-016-1000 | ND |
2018-03-28 | 3334-015-0905 | ND |
2018-04-10 | 3334-007-1040 | ND |
2018-04-10 | 3334-010-0945 | ND |
2018-04-10 | 3334-009-1155 | ND |
2018-04-10 | 3334-008-0830 | ND |
2018-04-11 | 3334-003-1030 | ND |
2018-04-11 | 3334-002-0845 | ND |
2018-04-11 | 3334-004-1130 | ND |
2018-04-11 | 3334-005-0845 | ND |
2018-04-11 | 3334-001-1030 | ND |
2018-06-22 | 3334-015-1030 | ND |
2018-06-22 | 3334-016-0850 | ND |
2019-02-12 | 3334-001-1030 | ND |