1,1,1,2-Tetrachloroethane
Westchester County Water District #3
1,1,1,2-Tetrachloroethane is a synthetic chemical used in metal degreasing and as an intermediate in industrial chemical production.
21
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 | 1 | 0 | ND |
| 2020 | ND | 4 | 0 | ND |
| 2021 | ND | 5 | 0 | ND |
| 2022 | ND | 5 | 0 | ND |
| 2023 | ND | 5 | 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 |
|---|---|---|
| 2018-09-24 | AU20759POCS | ND |
| 2019-11-12 | AV23848POCS | ND |
| 2020-04-28 | AW07856POCS | ND |
| 2020-11-09 | AW21633POCS | ND |
| 2020-12-15 | AW23891-POCS | ND |
| 2020-12-15 | AW23893-POCS | ND |
| 2021-04-06 | AX06359-POCS | ND |
| 2021-09-20 | AX19180-POCS-WD3 | ND |
| 2021-09-20 | AX19184-POCS-WD3 | ND |
| 2021-11-09 | AX22573-POCS | ND |
| 2021-11-09 | AX22576-POCS | ND |
| 2022-04-11 | AY05984-POCS | ND |
| 2022-10-24 | AY19125-POCS-WD3 | ND |
| 2022-10-24 | AY19127-POCS-WD3 | ND |
| 2022-11-01 | AY19681-POCS | ND |
| 2022-11-01 | AY19679-POCS | ND |
| 2023-04-25 | AZ07359--POCS | ND |
| 2023-10-19 | AZ19385-POCS-WD3 | ND |
| 2023-10-19 | AZ19384-POCS-WD3 | ND |
| 2023-11-01 | AZ20238-POCS | ND |
| 2023-11-01 | AZ20240-POCS | ND |