1,1-Dichloroethylene
City of Black Hawk
1,1-Dichloroethylene is used for plastics production. It damages DNA and causes cancer in laboratory animal studies.
Testing results - average by year
Year | Average result | Samples taken | Detections | Range of results |
---|---|---|---|---|
2013 | N/A | 0 | 0 | N/A |
2014 | ND | 2 | 0 | ND |
2015 | ND | 2 | 0 | ND |
2016 | ND | 2 | 0 | ND |
2017 | ND | 2 | 0 | ND |
2018 | ND | 3 | 0 | ND |
2019 | ND | 2 | 0 | ND |
ppb = parts per billion
State and national drinking water standards and health guidelines
EPA Maximum Contaminant
Level (MCL) 7 ppb
The legal limit for 1,1-dichloroethylene, established in 1987, was based on a toxicity study conducted in laboratory animals in the 1980s.
ppb = parts per billion
All test results
Date | Result |
---|---|
2014-02-25 | ND |
2014-05-27 | ND |
2015-05-12 | ND |
2015-08-12 | ND |
2016-03-07 | ND |
2016-03-08 | ND |
2017-03-08 | ND |
2017-04-18 | ND |
2018-07-18 | ND |
2018-07-24 | ND |
2018-10-17 | ND |
2019-03-04 | ND |
2019-03-05 | ND |