cis-1,2-Dichloroethylene
City of Rockville
1,2-Dichloroethylene, a neurotoxic solvent, exists in two different forms: trans-1,2-dichloroethylene and cis-1,2-dichloroethylene. A mixture of the two forms is used to manufacture other solvents and chemical products.
Testing results - average by year
Year | Average result | Samples taken | Detections | Range of results |
---|---|---|---|---|
2014 | ND | 1 | 0 | ND |
2015 | ND | 1 | 0 | ND |
2016 | ND | 1 | 0 | ND |
2017 | ND | 1 | 0 | ND |
2018 | ND | 2 | 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) 70 ppb
The legal limit for cis-1,2-dichloroethylene, established in 1991, was based on a toxicity study in laboratory animals conducted in the 1980s.
ppb = parts per billion
All test results
Date | Lab ID | Result |
---|---|---|
2014-01-17 | 0150003_01_10681 | ND |
2015-01-06 | 0150003_01_20480 | ND |
2016-01-07 | 2117381001 | ND |
2017-01-05 | 2200166006 | ND |
2018-01-10 | 2200166006 | ND |
2018-03-08 | E18003254001 | ND |
2019-01-19 | 2200166006 | ND |
2019-01-28 | E19002296004 | ND |