1,1,1,2-Tetrachloroethane
Whitworth Water District 2
1,1,1,2-Tetrachloroethane is a synthetic chemical used in metal degreasing and as an intermediate in industrial chemical production.
29
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 | 1 | 0 | ND |
| 2019 | ND | 13 | 0 | ND |
| 2020 | N/A | 0 | 0 | N/A |
| 2021 | ND | 3 | 0 | ND |
| 2022 | ND | 11 | 0 | ND |
| 2023 | ND | 1 | 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 |
|---|---|---|
| 2018-03-20 | ND | |
| 2019-04-18 | ND | |
| 2019-04-18 | ND | |
| 2019-04-18 | ND | |
| 2019-04-18 | ND | |
| 2019-05-09 | ND | |
| 2019-05-21 | ND | |
| 2019-05-21 | ND | |
| 2019-05-28 | ND | |
| 2019-05-28 | ND | |
| 2019-05-28 | ND | |
| 2019-05-28 | ND | |
| 2019-06-18 | ND | |
| 2019-06-21 | ND | |
| 2021-03-18 | 4094088 | ND |
| 2021-07-08 | 4138074 | ND |
| 2021-10-28 | 4196693 | ND |
| 2022-01-24 | 4236842 | ND |
| 2022-03-31 | 4261610 | ND |
| 2022-04-21 | 4272380 | ND |
| 2022-04-21 | 4272384 | ND |
| 2022-05-18 | 4288406 | ND |
| 2022-06-27 | 4309802 | ND |
| 2022-06-27 | 4309800 | ND |
| 2022-07-14 | 4309809 | ND |
| 2022-07-14 | 4309808 | ND |
| 2022-07-14 | 4309807 | ND |
| 2022-10-11 | 4356380 | ND |
| 2023-04-27 | 4452170 | ND |