Diquat
City of Chandler
Diquat is a herbicide used on potato crops and aquatic weeds.
181
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 | 7 | 0 | ND |
| 2015 | ND | 68 | 0 | ND |
| 2016 | ND | 9 | 0 | ND |
| 2017 | ND | 13 | 0 | ND |
| 2018 | ND | 77 | 0 | ND |
| 2019 | ND | 7 | 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 |
|---|---|---|
| 2014-01-27 | 550-18400-3 | ND |
| 2014-01-27 | 550-18401-2S | ND |
| 2014-01-28 | 550-18497-3 | ND |
| 2014-04-16 | 550-23096-2 | ND |
| 2014-07-30 | 550-28885-5 | ND |
| 2014-10-30 | 550-34238-2 | ND |
| 2014-10-30 | 550-34238-4 | ND |
| 2015-01-13 | 550-38296-1 | ND |
| 2015-01-13 | 550-38298-1 | ND |
| 2015-01-13 | 550-38301-1S | ND |
| 2015-01-15 | 550-38538-1 | ND |
| 2015-01-15 | 550-38540-1S | ND |
| 2015-01-15 | 550-38544-1 | ND |
| 2015-01-20 | 550-38732-1 | ND |
| 2015-01-20 | 550-38733-1 | ND |
| 2015-01-20 | 550-38736-1 | ND |
| 2015-01-22 | 550-38880-1 | ND |
| 2015-01-22 | 550-38882-1 | ND |
| 2015-01-22 | 550-38883-1 | ND |
| 2015-01-26 | 550-39002-1 | ND |
| 2015-01-26 | 550-39006-1 | ND |
| 2015-01-26 | 550-39007-1 | ND |
| 2015-01-27 | 550-39062-1 | ND |
| 2015-01-27 | 550-39064-1 | ND |
| 2015-01-27 | 550-39066-1 | ND |
| 2015-01-29 | 550-39227-1 | ND |
| 2015-01-29 | 550-39230-1 | ND |
| 2015-02-02 | 550-39342-1 | ND |
| 2015-02-02 | 550-39345-1S | ND |
| 2015-02-02 | 550-39348-1 | ND |
| 2015-02-03 | 550-39232-3 | ND |
| 2015-02-03 | 550-39458-1 | ND |
| 2015-02-03 | 550-39459-1S | ND |
| 2015-02-03 | 550-39460-1 | ND |
| 2015-04-13 | 550-43129-1 | ND |
| 2015-04-13 | 550-43130-1S | ND |
| 2015-04-13 | 550-43131-1 | ND |
| 2015-04-13 | 550-43132-1S | ND |
| 2015-04-15 | 550-43275-1S | ND |
| 2015-04-15 | 550-43280-1 | ND |
| 2015-04-22 | 550-43628-1S | ND |
| 2015-07-14 | 550-47832-1S | ND |
| 2015-07-14 | 550-47832-3S | ND |
| 2015-07-14 | 550-47832-5S | ND |
| 2015-07-14 | 550-47832-7 | ND |
| 2015-07-15 | 550-47927-1S | ND |
| 2015-07-15 | 550-47927-3S | ND |
| 2015-07-15 | 550-47927-5S | ND |
| 2015-07-16 | 550-48011-1S | ND |
| 2015-07-16 | 550-48011-3 | ND |
| 2015-07-16 | 550-48011-5S | ND |
| 2015-07-22 | 550-48251-1S | ND |
| 2015-07-22 | 550-48251-3S | ND |
| 2015-07-22 | 550-48251-5S | ND |
| 2015-07-22 | 550-48251-7S | ND |
| 2015-07-23 | 550-48380-1S | ND |
| 2015-07-23 | 550-48380-3S | ND |
| 2015-07-23 | 550-48380-5S | ND |
| 2015-07-23 | 550-48380-7S | ND |
| 2015-07-27 | 550-48489-1 | ND |
| 2015-07-27 | 550-48489-3S | ND |
| 2015-07-27 | 550-48489-5S | ND |
| 2015-07-27 | 550-48489-7S | ND |
| 2015-07-28 | 550-48484-3S | ND |
| 2015-07-28 | 550-48484-5S | ND |
| 2015-07-29 | 550-048582-1S | ND |
| 2015-07-29 | 550-48582-3S | ND |
| 2015-11-03 | 550-53731-2T | ND |
| 2015-11-03 | 550-53731-3T | ND |
| 2015-11-03 | 550-53731-6T | ND |
| 2015-11-04 | 550-53818-1 | ND |
| 2015-11-05 | 550-53917-1T | ND |
| 2015-11-05 | 550-53917-3 | ND |
| 2015-11-05 | 550-53917-5T | ND |
| 2015-11-18 | 550-54553-1T | ND |
| 2016-01-21 | 550-57604-1 | ND |
| 2016-01-21 | 550-57604-3 | ND |
| 2016-01-27 | 550-57867-1 | ND |
| 2016-04-22 | 550-62282-1 | ND |
| 2016-07-08 | 550-66063-2 | ND |
| 2016-07-08 | 550-66063-2S | ND |
| 2016-10-26 | 550-71834-2 | ND |
| 2016-10-28 | 550-72003-2 | ND |
| 2016-12-29 | 550-75055-1S | ND |
| 2017-01-31 | 550-76677-1S | ND |
| 2017-02-01 | 550-76755-2S | ND |
| 2017-02-06 | 550-76980-3S | ND |
| 2017-04-18 | 550-81248-1SOC | ND |
| 2017-06-12 | 550-84299-1 SOC | ND |
| 2017-06-19 | 550-84660-1 SOC | ND |
| 2017-06-28 | 550-85097-1 SOC | ND |
| 2017-08-01 | 550-87110-2 | ND |
| 2017-08-30 | 550-88911-1SOC | ND |
| 2017-08-31 | 550-89003-1SOC | ND |
| 2017-10-11 | 550-91314-1 | ND |
| 2017-10-12 | 550-91428-5 SOC | ND |
| 2017-11-28 | 550-93819-1 | ND |
| 2018-01-23 | 550-96737-1 SOC | ND |
| 2018-01-23 | 550-96737-2 SOC | ND |
| 2018-01-23 | 550-96737-3 SOC | ND |
| 2018-01-23 | 550-96737-4 SOC | ND |
| 2018-01-24 | 550-96821-1 SOC | ND |
| 2018-01-24 | 550-96821-2 SOC | ND |
| 2018-01-24 | 550-96821-3 SOC | ND |
| 2018-01-24 | 550-96821-4 SOC | ND |
| 2018-01-24 | 550-96821-5 SOC | ND |
| 2018-01-25 | 550-96914-1 SOC | ND |
| 2018-01-25 | 550-96914-2 SOC | ND |
| 2018-01-25 | 550-96914-3 SOC | ND |
| 2018-01-25 | 550-96914-4 SOC | ND |
| 2018-01-25 | 550-96914-5 SOC | ND |
| 2018-01-29 | 550-97023-1 SOC | ND |
| 2018-01-29 | 550-97023-2 SOC | ND |
| 2018-01-29 | 550-97023-3 SOC | ND |
| 2018-01-29 | 550-97023-4 SOC | ND |
| 2018-01-30 | 550-97100-2 | ND |
| 2018-01-30 | 550-97100-3 SOC | ND |
| 2018-01-30 | 550-97100-4 SOC | ND |
| 2018-01-31 | 550-97179-1 SOC | ND |
| 2018-02-01 | 550-97256-1 SOC | ND |
| 2018-02-01 | 550-97256-2 SOC | ND |
| 2018-02-01 | 550-97256-3 SOC | ND |
| 2018-02-01 | 550-97256-4 SOC | ND |
| 2018-03-05 | 550-98895-1 SOC | ND |
| 2018-03-05 | 550-98895-2 SOC | ND |
| 2018-04-17 | 550-101375-2 SOC | ND |
| 2018-04-17 | 550-101375-3 | ND |
| 2018-04-18 | 550-101450-2 SOC | ND |
| 2018-04-18 | 550-101450-4 SOC | ND |
| 2018-04-19 | 550-101546-2 | ND |
| 2018-04-19 | 550-101546-4 SOC | ND |
| 2018-04-20 | 550-101629-1 SOC | ND |
| 2018-05-17 | 550-103120-2 SOC | ND |
| 2018-06-28 | 550-105094-2 SOC | ND |
| 2018-06-28 | 550-105094-3 SOC | ND |
| 2018-07-23 | 550-106554-1 | ND |
| 2018-07-23 | 550-106554-2 | ND |
| 2018-07-23 | 550-106554-3 SOC | ND |
| 2018-07-23 | 550-106554-4 SOC | ND |
| 2018-07-23 | 550-106554-5 | ND |
| 2018-07-23 | 550-106554-6 SOC | ND |
| 2018-07-24 | 550-106603-1 | ND |
| 2018-07-24 | 550-106603-2 | ND |
| 2018-07-24 | 550-106603-3 | ND |
| 2018-07-24 | 550-106603-4 SOC | ND |
| 2018-07-24 | 550-106603-5 | ND |
| 2018-07-25 | 550-106658-1 | ND |
| 2018-07-25 | 550-106658-2 SOC | ND |
| 2018-07-25 | 550-106658-3 SOC | ND |
| 2018-07-25 | 550-106658-4 SOC | ND |
| 2018-07-25 | 550-106658-5 | ND |
| 2018-07-25 | 550-106658-6 | ND |
| 2018-07-26 | 550-106757-1 SOC | ND |
| 2018-07-26 | 550-106757-2 SOC | ND |
| 2018-07-26 | 550-106757-3 SOC | ND |
| 2018-07-26 | 550-106757-4 SOC | ND |
| 2018-07-26 | 550-106757-5 SOC | ND |
| 2018-07-26 | 550-106757-6 | ND |
| 2018-07-30 | 550-106907-1 SOC | ND |
| 2018-07-30 | 550-106907-2 SOC | ND |
| 2018-07-30 | 550-106907-3 | ND |
| 2018-07-30 | 550-106907-4 | ND |
| 2018-07-30 | 550-106907-5 SOC | ND |
| 2018-08-21 | 550-108374-1 | ND |
| 2018-10-17 | 550-111920-1 | ND |
| 2018-10-18 | 550-111989-3 SOC | ND |
| 2018-10-22 | 550-112146-2 | ND |
| 2018-10-22 | 550-112146-4 | ND |
| 2018-10-23 | 550-112224-1 | ND |
| 2018-10-24 | 550-112296-1 | ND |
| 2018-10-24 | 550-112296-2 | ND |
| 2018-10-25 | 550-112373-1 | ND |
| 2018-10-25 | 550-112373-2 | ND |
| 2018-11-29 | 550-113994-4 | ND |
| 2019-01-22 | 201901220200S | ND |
| 2019-01-22 | 201901220202S | ND |
| 2019-03-25 | 201903250345S | ND |
| 2019-04-16 | 201904160414S | ND |
| 2019-07-16 | 201907160471S | ND |
| 2019-07-22 | 201907220239S | ND |
| 2019-10-09 | 201910090509S | ND |