1,1,1,2-Tetrachloroethane
Dayton Valley Water System
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 | 2 | 0 | ND |
| 2015 | ND | 2 | 0 | ND |
| 2016 | ND | 4 | 0 | ND |
| 2017 | ND | 2 | 0 | ND |
| 2018 | ND | 2 | 0 | ND |
| 2019 | ND | 8 | 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 |
|---|---|---|
| 2014-05-13 | 1405260-007 | ND |
| 2014-05-13 | 1405260-006 | ND |
| 2015-05-26 | 1505605-001 | ND |
| 2015-05-26 | 1505605-002 | ND |
| 2016-04-20 | 1604512-002 | ND |
| 2016-05-18 | 201605240202 | ND |
| 2016-08-23 | 6H25005-01 | ND |
| 2016-08-23 | 6H25005-02 | ND |
| 2017-05-10 | 201705130308 | ND |
| 2017-05-10 | 201705130310 | ND |
| 2018-05-16 | 1805551-002 | ND |
| 2018-05-16 | 1805551-001 | ND |
| 2019-04-02 | 19040080-001 | ND |
| 2019-05-20 | 19050593-001 | ND |
| 2019-05-20 | 19050593-001VOC | ND |
| 2019-06-27 | 19060931-001 | ND |
| 2019-06-27 | 19060933-001 | ND |
| 2019-06-27 | 19060933-002 | ND |
| 2019-08-14 | 19080524-001 | ND |
| 2019-10-31 | 19101057-001 | ND |