Diquat
City of Keizer
Diquat is a herbicide used on potato crops and aquatic weeds.
62
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 | ND | 3 | 0 | ND |
| 2015 | ND | 2 | 0 | ND |
| 2016 | ND | 27 | 0 | ND |
| 2017 | N/A | 0 | 0 | N/A |
| 2018 | N/A | 0 | 0 | N/A |
| 2019 | ND | 30 | 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 |
|---|---|---|
| 2014-04-15 | 404162002-S | ND |
| 2014-04-15 | 404162003-S | ND |
| 2014-04-15 | 404162001-S | ND |
| 2015-04-14 | 504151803-S | ND |
| 2015-04-14 | 504151804 | ND |
| 2016-05-25 | 605252201-S | ND |
| 2016-05-25 | 605252205-S | ND |
| 2016-05-25 | 605252211-S | ND |
| 2016-05-25 | 605252208-S | ND |
| 2016-05-25 | 605252210-S | ND |
| 2016-05-25 | 605252203-S | ND |
| 2016-05-25 | 605252214-S | ND |
| 2016-05-25 | 605252213-S | ND |
| 2016-05-25 | 605252202-S | ND |
| 2016-05-25 | 605252206-S | ND |
| 2016-05-25 | 605252212-S | ND |
| 2016-05-25 | 605252204-S | ND |
| 2016-05-25 | 605252207-S | ND |
| 2016-05-25 | 605252209-S | ND |
| 2016-08-10 | 608110108-S | ND |
| 2016-08-10 | 608110107-S | ND |
| 2016-08-10 | 608110110-S | ND |
| 2016-08-10 | 608110103-S | ND |
| 2016-08-10 | 608110113-S | ND |
| 2016-08-10 | 608110101-S | ND |
| 2016-08-10 | 608110102-S | ND |
| 2016-08-10 | 608110105-S | ND |
| 2016-08-10 | 608110111-S | ND |
| 2016-08-10 | 608110104-S | ND |
| 2016-08-10 | 608110106-S | ND |
| 2016-08-10 | 608110109-S | ND |
| 2016-08-10 | 608110112-S | ND |
| 2019-06-11 | 906112008-S | ND |
| 2019-06-11 | 906112005-S | ND |
| 2019-06-11 | 906112015-S | ND |
| 2019-06-11 | 906112009-S | ND |
| 2019-06-11 | 906112010-S | ND |
| 2019-06-11 | 906112003-S | ND |
| 2019-06-11 | 906112014-S | ND |
| 2019-06-11 | 906112013-S | ND |
| 2019-06-11 | 906112001-S | ND |
| 2019-06-11 | 906112006-S | ND |
| 2019-06-11 | 906112012-S | ND |
| 2019-06-11 | 906112004-S | ND |
| 2019-06-11 | 906112007-S | ND |
| 2019-06-11 | 906112011-S | ND |
| 2019-06-11 | 906112002-S | ND |
| 2019-08-13 | 908132512-S | ND |
| 2019-08-13 | 908132507-S | ND |
| 2019-08-13 | 908132501-S | ND |
| 2019-08-13 | 908132515-S | ND |
| 2019-08-13 | 908132502-S | ND |
| 2019-08-13 | 908132510-S | ND |
| 2019-08-13 | 908132506-S | ND |
| 2019-08-13 | 908132509-S | ND |
| 2019-08-13 | 908132505-S | ND |
| 2019-08-13 | 908132508-S | ND |
| 2019-08-13 | 908132513-S | ND |
| 2019-08-13 | 908132504-S | ND |
| 2019-08-13 | 908132511-S | ND |
| 2019-08-13 | 908132514-S | ND |
| 2019-08-13 | 908132503-S | ND |