Diquat
Hellertown Borough Authority
Diquat is a herbicide used on potato crops and aquatic weeds.
12
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 | 6 | 0 | ND |
2015 | N/A | 0 | 0 | N/A |
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 |
---|---|---|
2014-04-08 | 140014671 | ND |
2014-04-10 | 140014702 | ND |
2014-04-11 | 140014711 | ND |
2014-08-05 | 140034953 | ND |
2014-08-06 | 140034951 | ND |
2014-08-06 | 140034949 | ND |
2017-05-15 | 16309897 | ND |
2017-05-16 | 16309947 | ND |
2017-06-15 | 16310042 | ND |
2017-10-17 | 17067396 | ND |
2017-10-19 | 17067367 | ND |
2017-10-19 | 16926703 | ND |