1,1,1,2-Tetrachloroethane
Wattsville Water Authority
1,1,1,2-Tetrachloroethane is a synthetic chemical used in metal degreasing and as an intermediate in industrial chemical production.
15
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 | 3 | 0 | ND |
| 2021 | 0.500 ppb | 2 | 2 | 0.500 ppb |
| 2022 | ND | 3 | 0 | ND |
| 2023 | ND | 3 | 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 |
|---|---|---|
| 2018-01-08 | 1801-00078-3 | ND |
| 2018-01-08 | 1801-00078-5 | ND |
| 2019-01-14 | 1901-00204-003 | ND |
| 2019-01-14 | 1901-00204-004 | ND |
| 2020-03-09 | 2003-00158-003 | ND |
| 2020-03-09 | 2003-00158-004 | ND |
| 2020-03-09 | 2003-00158-007 | ND |
| 2021-01-06 | 2101-00069-003 | 0.500 ppb |
| 2021-01-06 | 2101-00069-005 | 0.500 ppb |
| 2022-03-15 | 2203-00287-002 | ND |
| 2022-03-15 | 2203-00287-003 | ND |
| 2022-03-15 | 2203-00287-004 | ND |
| 2023-02-15 | 2302-00340-004 | ND |
| 2023-02-15 | 2302-00340-005 | ND |
| 2023-02-15 | 2302-00340-006 | ND |