Diquat
Menomonee Falls WW - Surface Water
NOTE: Menomonee Falls WW - Surface Water purchases water from Milwaukee Waterworks which is required to test for diquat. Sample information shown below was taken by Milwaukee Waterworks.
Diquat is a herbicide used on potato crops and aquatic weeds.
Samples
Samples exceeding legal limit (MCL)
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2014 | ND | 3 | 0 | ND |
| 2015 | ND | 6 | 0 | ND |
| 2016 | N/A | 0 | 0 | N/A |
| 2017 | ND | 1 | 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
NOTE: Menomonee Falls WW - Surface Water purchases water from Milwaukee Waterworks which is required to test for diquat. Sample information shown below was taken by Milwaukee Waterworks.
| Date | Lab ID | Result |
|---|---|---|
| 2014-05-19 | 3029004,06-12 | ND |
| 2014-08-18 | 3085049-50,53-56 | ND |
| 2014-08-19 | 3086073-74,77-79 | ND |
| 2014-08-21 | 3088567-68,71-73 | ND |
| 2014-08-21 | 3088697-98,701-0 | ND |
| 2014-08-21 | 3088610-11,15-17 | ND |
| 2014-08-21 | 3088669-70,73-76 | ND |
| 2014-11-17 | 3140303-07,09-10 | ND |
| 2015-08-17 | 3302465-66,70-72 | ND |
| 2015-08-17 | 3302540-41,45-47 | ND |
| 2015-08-17 | 3302431-32,36-38 | ND |
| 2015-08-17 | 3302506-07,11-13 | ND |
| 2015-08-18 | 3303575-76,80-82 | ND |
| 2015-08-19 | 3304961-62,65-66 | ND |
| 2017-05-23 | 3699582-88 | ND |
| 2017-05-23 | 3699595-601 | ND |
| 2017-08-21 | 3762070-76,79 | ND |
| 2017-08-21 | 3762288-94,97 | ND |