1,1,1,2-Tetrachloroethane
City of Castroville
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 |
|---|---|---|
| 2018-03-28 | AE20664 | ND |
| 2018-03-28 | AE20680 | ND |
| 2019-06-18 | AE71110 | ND |
| 2019-06-18 | AE71116 | ND |
| 2020-01-28 | AE95679 | ND |
| 2020-01-28 | AE95685 | ND |
| 2021-06-28 | AF59673 | ND |
| 2021-06-28 | AF59675 | ND |
| 2022-02-08 | AF83711 | ND |
| 2022-02-08 | AF83715 | ND |
| 2023-03-28 | AG34417 | ND |
| 2023-03-28 | AG34419 | ND |