1,1,1,2-Tetrachloroethane
Caddo Lake Water Supply Corporation
1,1,1,2-Tetrachloroethane is a synthetic chemical used in metal degreasing and as an intermediate in industrial chemical production.
12
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 | 2 | 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 |
|---|---|---|
| 2018-09-20 | Q1837726002 | ND |
| 2018-09-20 | Q1837726003 | ND |
| 2019-06-10 | Q1933418005 | ND |
| 2019-06-10 | Q1933418007 | ND |
| 2020-10-22 | Q2041223001 | ND |
| 2020-10-22 | Q2041223003 | ND |
| 2021-05-24 | Q2113525008 | ND |
| 2021-05-24 | Q2113525010 | ND |
| 2022-11-22 | Q2235079008 | ND |
| 2022-11-22 | Q2235079010 | ND |
| 2023-06-29 | Q2325157001 | ND |
| 2023-06-29 | Q2325157003 | ND |