Diquat
Connecticut Water Company - Northern Region-Western System
Diquat is a herbicide used on potato crops and aquatic weeds.
39
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 | 1 | 0 | ND |
| 2015 | ND | 19 | 0 | ND |
| 2016 | ND | 3 | 0 | ND |
| 2017 | ND | 11 | 0 | ND |
| 2018 | ND | 3 | 0 | ND |
| 2019 | ND | 2 | 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 |
|---|---|---|
| 2014-03-20 | 140325CWCSOC5 | ND |
| 2015-01-20 | 3173046 | ND |
| 2015-02-11 | 3185961 | ND |
| 2015-03-19 | 3210163 | ND |
| 2015-03-19 | 3210172 | ND |
| 2015-03-30 | 3216187 | ND |
| 2015-03-31 | 3216987 | ND |
| 2015-04-22 | 3230622 | ND |
| 2015-04-22 | 3230630 | ND |
| 2015-04-22 | 3230614 | ND |
| 2015-04-27 | 3231829 | ND |
| 2015-04-28 | 3232538 | ND |
| 2015-05-26 | 3249448 | ND |
| 2015-06-12 | BJ30561SOC5 | ND |
| 2015-07-01 | BJ40227SOC5 | ND |
| 2015-07-02 | BJ41078SOC5 | ND |
| 2015-07-30 | BJ65812SOC5 | ND |
| 2015-08-21 | BJ79580SOC5 | ND |
| 2015-08-28 | BJ83828SOC5 | ND |
| 2015-09-02 | BJ85109SOC5 | ND |
| 2016-01-27 | BK58056SOC5 | ND |
| 2016-05-25 | BN40004SOC5 | ND |
| 2016-06-23 | BN62227SOC5 | ND |
| 2017-03-03 | BX79851SOC5 | ND |
| 2017-03-03 | BX79849SOC5 | ND |
| 2017-04-06 | BY00572SOC5 | ND |
| 2017-04-21 | BY07960SOC5 | ND |
| 2017-04-21 | BY07962SOC5 | ND |
| 2017-05-30 | BY30818SOC5 | ND |
| 2017-06-01 | BY32097SOC5 | ND |
| 2017-07-07 | BY54443SOC5 | ND |
| 2017-07-14 | BY60158SOC5 | ND |
| 2017-07-27 | BY73973SOC5 | ND |
| 2017-08-11 | BY83260SOC5 | ND |
| 2018-01-31 | BZ82950SOC5 | ND |
| 2018-06-28 | CA80715SOC5 | ND |
| 2018-08-03 | CB04980 | ND |
| 2019-01-09 | SOC 200518249 | ND |
| 2019-03-11 | SOC 200524185 | ND |