1,1,1,2-Tetrachloroethane
Littleton Water Department
1,1,1,2-Tetrachloroethane is a synthetic chemical used in metal degreasing and as an intermediate in industrial chemical production.
50
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 | 7 | 0 | ND |
| 2019 | ND | 7 | 0 | ND |
| 2020 | ND | 7 | 0 | ND |
| 2021 | ND | 9 | 0 | ND |
| 2022 | ND | 9 | 0 | ND |
| 2023 | ND | 11 | 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 | Result |
|---|---|
| 2018-04-11 | ND |
| 2018-05-01 | ND |
| 2018-05-01 | ND |
| 2018-05-01 | ND |
| 2018-05-07 | ND |
| 2018-05-07 | ND |
| 2018-06-19 | ND |
| 2019-05-01 | ND |
| 2019-05-01 | ND |
| 2019-05-01 | ND |
| 2019-05-01 | ND |
| 2019-05-30 | ND |
| 2019-06-05 | ND |
| 2019-06-17 | ND |
| 2020-05-14 | ND |
| 2020-05-14 | ND |
| 2020-05-26 | ND |
| 2020-05-26 | ND |
| 2020-05-26 | ND |
| 2020-05-26 | ND |
| 2020-06-16 | ND |
| 2021-04-05 | ND |
| 2021-04-05 | ND |
| 2021-04-05 | ND |
| 2021-04-05 | ND |
| 2021-04-05 | ND |
| 2021-04-12 | ND |
| 2021-06-09 | ND |
| 2021-07-26 | ND |
| 2021-10-21 | ND |
| 2022-02-16 | ND |
| 2022-05-18 | ND |
| 2022-05-18 | ND |
| 2022-05-18 | ND |
| 2022-05-18 | ND |
| 2022-05-18 | ND |
| 2022-05-18 | ND |
| 2022-05-18 | ND |
| 2022-05-18 | ND |
| 2023-05-25 | ND |
| 2023-06-16 | ND |
| 2023-06-16 | ND |
| 2023-06-16 | ND |
| 2023-06-16 | ND |
| 2023-06-16 | ND |
| 2023-06-16 | ND |
| 2023-06-16 | ND |
| 2023-06-16 | ND |
| 2023-07-20 | ND |
| 2023-10-04 | ND |