Diquat
Aquarion Water Company of Connecticut - Main System
Diquat is a herbicide used on potato crops and aquatic weeds.
23
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 | N/A | 0 | 0 | N/A |
| 2015 | ND | 10 | 0 | ND |
| 2016 | N/A | 0 | 0 | N/A |
| 2017 | N/A | 0 | 0 | N/A |
| 2018 | ND | 4 | 0 | ND |
| 2019 | ND | 9 | 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 |
|---|---|---|
| 2015-07-06 | 201508663-SOC | ND |
| 2015-07-06 | 201508689-SOC | ND |
| 2015-07-06 | 201508646-SOC | ND |
| 2015-07-08 | 201508843-SOC | ND |
| 2015-08-05 | 201510632-SOC | ND |
| 2015-10-05 | 201514160-SOC | ND |
| 2015-10-05 | 201514098-SOC | ND |
| 2015-10-06 | 201514213-SOC | ND |
| 2015-10-07 | 201514316-SOC | ND |
| 2015-10-07 | 201514322-SOC | ND |
| 2018-07-02 | 201809434-SOC | ND |
| 2018-07-02 | 201809407-SOC | ND |
| 2018-07-02 | 201809385-SOC | ND |
| 2018-07-05 | 201809658-SOC | ND |
| 2019-05-20 | 201907127-SOC | ND |
| 2019-05-20 | 201907132-SOC | ND |
| 2019-05-20 | 201907135-SOC | ND |
| 2019-06-17 | 201908775-SOC | ND |
| 2019-07-01 | 201909657-SOC | ND |
| 2019-07-01 | 201909689-SOC | ND |
| 2019-07-01 | 201909695-SOC | ND |
| 2019-07-01 | 201909693-SOC | ND |
| 2019-07-02 | 201909818-SOC | ND |