1,1,1,2-Tetrachloroethane
Redhill Water Association
NOTE: Redhill Water Association purchases water from Alma Waterworks which is required to test for 1,1,1,2-tetrachloroethane. Sample information shown below was taken by Alma Waterworks.
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 | 1 | 0 | ND |
| 2019 | ND | 1 | 0 | ND |
| 2020 | ND | 5 | 0 | ND |
| 2021 | ND | 5 | 0 | ND |
| 2022 | ND | 4 | 0 | ND |
| 2023 | N/A | 0 | 0 | N/A |
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: Redhill Water Association purchases water from Alma Waterworks which is required to test for 1,1,1,2-tetrachloroethane. Sample information shown below was taken by Alma Waterworks.
| Date | Lab ID | Result |
|---|---|---|
| 2018-01-01 | 18004012709 | ND |
| 2019-02-05 | 19038001501 | ND |
| 2020-01-07 | 20009017401 | ND |
| 2020-04-13 | 20107011508 | ND |
| 2020-07-08 | 20191012409 | ND |
| 2020-11-02 | 20310000709 | ND |
| 2021-01-19 | 21021001907 | ND |
| 2021-04-06 | 21098014201 | ND |
| 2022-04-04 | O196531-VOC-1 | ND |