1,1,1,2-Tetrachloroethane
City of Stamford
1,1,1,2-Tetrachloroethane is a synthetic chemical used in metal degreasing and as an intermediate in industrial chemical production.
9
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 |
|---|---|---|---|---|
| 2018 | ND | 1 | 0 | ND |
| 2019 | ND | 1 | 0 | ND |
| 2020 | ND | 1 | 0 | ND |
| 2021 | ND | 1 | 0 | ND |
| 2022 | ND | 2 | 0 | ND |
| 2023 | ND | 3 | 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
| Date | Lab ID | Result |
|---|---|---|
| 2018-09-19 | Q1837653003 | ND |
| 2019-08-22 | Q1958561001 | ND |
| 2020-09-14 | Q2036319001 | ND |
| 2021-09-07 | Q2124175003 | ND |
| 2022-09-08 | Q2226788002 | ND |
| 2022-11-29 | Q2235396003 | ND |
| 2023-03-14 | Q2310046005 | ND |
| 2023-05-17 | Q2318614001 | ND |
| 2023-09-06 | Q2338453001 | ND |