1,1,1,2-Tetrachloroethane
City of Houston Willow Chase
1,1,1,2-Tetrachloroethane is a synthetic chemical used in metal degreasing and as an intermediate in industrial chemical production.
20
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 |
|---|---|---|---|---|
| 2014 | N/A | 0 | 0 | N/A |
| 2015 | ND | 4 | 0 | ND |
| 2016 | ND | 4 | 0 | ND |
| 2017 | ND | 4 | 0 | ND |
| 2018 | ND | 4 | 0 | ND |
| 2019 | ND | 4 | 0 | ND |
ppb = parts per billion
State and national drinking water standards and health guidelines
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 |
|---|---|---|
| 2015-05-29 | AC93893 | ND |
| 2015-05-29 | AC93899 | ND |
| 2015-05-29 | AC93891 | ND |
| 2015-05-29 | AC93875 | ND |
| 2016-03-03 | AD26935 | ND |
| 2016-03-03 | AD26933 | ND |
| 2016-03-03 | AD26925 | ND |
| 2016-03-03 | AD26929 | ND |
| 2017-03-02 | AD73126 | ND |
| 2017-03-02 | AD73122 | ND |
| 2017-05-31 | AD86149 | ND |
| 2017-05-31 | AD86147 | ND |
| 2018-04-11 | AE22081 | ND |
| 2018-04-11 | AE22085 | ND |
| 2018-04-11 | AE22055 | ND |
| 2018-04-11 | AE22057 | ND |
| 2019-02-28 | AE56578 | ND |
| 2019-02-28 | AE56614 | ND |
| 2019-02-28 | AE56582 | ND |
| 2019-02-28 | AE56580 | ND |