Diquat
Pelham Water Works
Diquat is a herbicide used on potato crops and aquatic weeds.
24
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 | N/A | 0 | 0 | N/A |
2015 | ND | 10 | 0 | ND |
2016 | ND | 6 | 0 | ND |
2017 | N/A | 0 | 0 | N/A |
2018 | N/A | 0 | 0 | N/A |
2019 | ND | 8 | 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 |
---|---|---|
2015-04-20 | 1504-00270-4 | ND |
2015-04-20 | 1504-00270-5 | ND |
2015-04-20 | 1504-00270-1 | ND |
2015-04-20 | 1504-00270-3 | ND |
2015-04-20 | 1504-00270-2 | ND |
2015-10-19 | 1510-00203-4 | ND |
2015-10-19 | 1510-00203-5 | ND |
2015-10-19 | 1510-00203-1 | ND |
2015-10-19 | 1510-00203-2 | ND |
2015-10-19 | 1510-00203-3 | ND |
2016-09-22 | 1609-00299-5 | ND |
2016-09-22 | 1609-00299-3 | ND |
2016-09-22 | 1609-00299-2 | ND |
2016-09-22 | 1609-00299-6 | ND |
2016-09-22 | 1609-00299-4 | ND |
2016-09-22 | 1609-00299-1 | ND |
2019-04-16 | 1904-002235-003 | ND |
2019-04-16 | 1904-00235-004 | ND |
2019-04-16 | 1904-00235-002 | ND |
2019-04-16 | 1904-00235-001 | ND |
2019-10-22 | 1910-00352-004 | ND |
2019-10-22 | 1910-00352-002 | ND |
2019-10-22 | 1910-00352-003 | ND |
2019-10-22 | 1910-00352-001 | ND |