cis-1,2-Dichloroethylene
UNH/Durham Water Sys
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.
15
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 | 2 | 0 | ND |
| 2015 | ND | 2 | 0 | ND |
| 2016 | ND | 3 | 0 | ND |
| 2017 | ND | 3 | 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) 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 |
|---|---|---|
| 2014-10-23 | 137302.01 | ND |
| 2014-12-29 | 139426.01 | ND |
| 2015-07-15 | 145834.01 | ND |
| 2015-11-04 | 150026.01 | ND |
| 2016-08-17 | 159563.01 | ND |
| 2016-11-08 | 162651.01 | ND |
| 2016-11-08 | 162652.01 | ND |
| 2017-03-29 | 166973.01 | ND |
| 2017-06-21 | 170167.01 | ND |
| 2017-11-07 | 175741.01 | ND |
| 2018-08-30 | 186068.01 | ND |
| 2018-08-30 | 186067.01 | ND |
| 2018-11-26 | 189601.01 | ND |
| 2019-08-14 | 199213.01 | ND |
| 2019-10-23 | 202329.01 | ND |