1,1,1,2-Tetrachloroethane
Ellensburg Water Department
1,1,1,2-Tetrachloroethane is a synthetic chemical used in metal degreasing and as an intermediate in industrial chemical production.
14
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 | 2 | 0 | ND |
| 2015 | ND | 2 | 0 | ND |
| 2016 | N/A | 0 | 0 | N/A |
| 2017 | ND | 1 | 0 | ND |
| 2018 | ND | 7 | 0 | ND |
| 2019 | ND | 2 | 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 |
|---|---|---|
| 2014-03-05 | 09682 | ND |
| 2014-03-05 | 09683 | ND |
| 2015-04-20 | 16669 | ND |
| 2015-04-22 | 17403 | ND |
| 2017-10-30 | ND | |
| 2018-04-09 | ND | |
| 2018-04-09 | ND | |
| 2018-04-09 | ND | |
| 2018-04-10 | ND | |
| 2018-07-10 | ND | |
| 2018-09-12 | ND | |
| 2018-10-04 | ND | |
| 2019-02-06 | ND | |
| 2019-07-08 | ND |