1,1,1,2-Tetrachloroethane
Nocona Hills Water Supply Corporation
1,1,1,2-Tetrachloroethane is a synthetic chemical used in metal degreasing and as an intermediate in industrial chemical production.
13
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 | 2 | 0 | ND |
| 2019 | ND | 2 | 0 | ND |
| 2020 | ND | 2 | 0 | ND |
| 2021 | ND | 2 | 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 |
|---|---|---|
| 2018-12-10 | Q1850817001 | ND |
| 2018-12-10 | Q1850817004 | ND |
| 2019-02-20 | Q1907488002 | ND |
| 2019-02-20 | Q1907488007 | ND |
| 2020-09-21 | Q2037478001 | ND |
| 2020-09-21 | Q2037478003 | ND |
| 2021-06-21 | Q2116016005 | ND |
| 2021-06-21 | Q2116016007 | ND |
| 2022-05-10 | Q2213917001 | ND |
| 2022-05-10 | Q2213917003 | ND |
| 2023-07-05 | Q2326100006 | ND |
| 2023-07-05 | Q2326100008 | ND |
| 2023-10-03 | Q2342315001 | ND |