Diquat
Upper Saucon Township Water Supply
Diquat is a herbicide used on potato crops and aquatic weeds.
14
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 | 5 | 0 | ND |
2015 | ND | 3 | 0 | ND |
2016 | N/A | 0 | 0 | N/A |
2017 | ND | 6 | 0 | ND |
2018 | N/A | 0 | 0 | N/A |
2019 | N/A | 0 | 0 | N/A |
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 |
---|---|---|
2014-04-09 | 14040108-01 | ND |
2014-04-09 | 14040116-01 | ND |
2014-08-05 | 14040122-01 | ND |
2014-08-05 | 14040123-01 | ND |
2014-12-17 | 14100700-01 | ND |
2015-01-21 | 12322891 | ND |
2015-04-24 | 12790661 | ND |
2015-08-05 | 13172905 | ND |
2017-04-05 | 15986799 | ND |
2017-04-19 | 15986961 | ND |
2017-04-19 | 15986989 | ND |
2017-07-05 | 16459927 | ND |
2017-07-19 | 16614801 | ND |
2017-07-19 | 16614829 | ND |