1,1,1,2-Tetrachloroethane
Clear Lake City Water Authority
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 |
|---|---|---|---|---|
| 2013 | N/A | 0 | 0 | N/A |
| 2014 | ND | 1 | 0 | ND |
| 2015 | ND | 4 | 0 | ND |
| 2016 | ND | 4 | 0 | ND |
| 2017 | ND | 5 | 0 | ND |
| 2018 | ND | 3 | 0 | ND |
| 2019 | ND | 3 | 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 |
|---|---|---|
| 2014-02-26 | AC44797 | ND |
| 2015-01-20 | AC76766 | ND |
| 2015-01-20 | AC76760 | ND |
| 2015-01-20 | AC76770 | ND |
| 2015-01-20 | AC76758 | ND |
| 2016-01-19 | AD18636 | ND |
| 2016-01-19 | AD18634 | ND |
| 2016-06-20 | AD41195 | ND |
| 2016-06-20 | AD41193 | ND |
| 2017-01-19 | AD65733 | ND |
| 2017-03-08 | AD74031 | ND |
| 2017-03-08 | AD74033 | ND |
| 2017-03-08 | AD74035 | ND |
| 2017-10-25 | AE02122 | ND |
| 2018-02-20 | AE14467 | ND |
| 2018-03-12 | AE17898 | ND |
| 2018-04-24 | AE23717 | ND |
| 2019-02-27 | AE56261 | ND |
| 2019-02-27 | AE56279 | ND |
| 2019-02-27 | AE56283 | ND |