cis-1,2-Dichloroethylene
Billerica Water Works
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 |
---|---|---|---|---|
2013 | N/A | 0 | 0 | N/A |
2014 | ND | 2 | 0 | ND |
2015 | ND | 3 | 0 | ND |
2016 | ND | 2 | 0 | ND |
2017 | ND | 4 | 0 | ND |
2018 | ND | 4 | 0 | ND |
2019 | ND | 4 | 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 | Result |
---|---|
2014-08-19 | ND |
2014-12-13 | ND |
2015-02-17 | ND |
2015-05-20 | ND |
2015-11-18 | ND |
2016-08-04 | ND |
2016-11-16 | ND |
2017-02-15 | ND |
2017-05-16 | ND |
2017-08-16 | ND |
2017-11-16 | ND |
2018-02-13 | ND |
2018-05-16 | ND |
2018-08-15 | ND |
2018-11-15 | ND |
2019-02-14 | ND |
2019-05-16 | ND |
2019-08-15 | ND |
2019-12-09 | ND |