cis-1,2-Dichloroethylene
City of Durham
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.
14
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 |
|---|---|---|---|---|
| 2013 | N/A | 0 | 0 | N/A |
| 2014 | ND | 4 | 0 | ND |
| 2015 | ND | 2 | 0 | ND |
| 2016 | ND | 2 | 0 | ND |
| 2017 | ND | 2 | 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 |
|---|---|---|
| 2014-02-11 | C400986-01 | ND |
| 2014-02-11 | C400986-02 | ND |
| 2014-05-13 | C405353-01 | ND |
| 2014-08-12 | C409644-01 | ND |
| 2015-02-10 | ND | |
| 2015-02-10 | ND | |
| 2016-02-09 | CZ01068-01 | ND |
| 2016-02-09 | CZ01068-02 | ND |
| 2017-02-15 | CA00945-01 | ND |
| 2017-02-15 | CA00945-02 | ND |
| 2018-02-13 | CB01006-01 | ND |
| 2018-08-14 | CB08963-01 | ND |
| 2019-02-12 | CC01715-01 | ND |
| 2019-02-12 | CC01715-02 | ND |