cis-1,2-Dichloroethylene
East Lyme Water & Sewer Commission
NOTE: East Lyme Water & Sewer Commission purchases water from New London Department of Public Utilities which is required to test for cis-1,2-dichloroethylene. Sample information shown below was taken by New London Department of Public Utilities.
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.
Samples
Samples exceeding legal limit (MCL)
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2018 | ND | 10 | 0 | ND |
| 2019 | ND | 10 | 0 | ND |
| 2020 | ND | 4 | 0 | ND |
| 2021 | ND | 3 | 0 | ND |
| 2022 | ND | 6 | 0 | ND |
| 2023 | ND | 7 | 0 | ND |
ppb = parts per billion
State, National, and Health Guidelines for Drinking Water
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
NOTE: East Lyme Water & Sewer Commission purchases water from New London Department of Public Utilities which is required to test for cis-1,2-dichloroethylene. Sample information shown below was taken by New London Department of Public Utilities.
| Date | Lab ID | Result |
|---|---|---|
| 2018-11-29 | 28423VOC1 | ND |
| 2019-11-20 | 30476VOC1 | ND |
| 2020-12-01 | 32749VOC1 | ND |
| 2021-10-27 | 34804VOC1 | ND |
| 2022-09-15 | 36585VOC1 | ND |
| 2023-09-14 | 38755VOC1 | ND |