1,1,1,2-Tetrachloroethane
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 1,1,1,2-tetrachloroethane. Sample information shown below was taken by New London Department of Public Utilities.
1,1,1,2-Tetrachloroethane is a synthetic chemical used in metal degreasing and as an intermediate in industrial chemical production.
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
EWG Health Guideline: 1 ppb
The EWG Health Guideline of 1 ppb for 1,1,1,2-tetrachloroethane was defined by the Environmental Protection Agency as a one-in-a-million lifetime risk of cancer. Values greater than one-in-a-million cancer risk level can result in increased cancer cases above one in a million people.
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 1,1,1,2-tetrachloroethane. 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 |