1,1,1,2-Tetrachloroethane
Dedham Westwood Water District
1,1,1,2-Tetrachloroethane is a synthetic chemical used in metal degreasing and as an intermediate in industrial chemical production.
35
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 | ND | 6 | 0 | ND |
| 2015 | ND | 6 | 0 | ND |
| 2016 | ND | 6 | 0 | ND |
| 2017 | ND | 6 | 0 | ND |
| 2018 | ND | 5 | 0 | ND |
| 2019 | ND | 6 | 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 | Result |
|---|---|
| 2014-01-07 | ND |
| 2014-01-07 | ND |
| 2014-04-08 | ND |
| 2014-07-22 | ND |
| 2014-07-22 | ND |
| 2014-10-22 | ND |
| 2015-03-11 | ND |
| 2015-03-11 | ND |
| 2015-04-07 | ND |
| 2015-07-28 | ND |
| 2015-07-29 | ND |
| 2015-11-17 | ND |
| 2016-01-05 | ND |
| 2016-01-05 | ND |
| 2016-04-05 | ND |
| 2016-07-12 | ND |
| 2016-07-12 | ND |
| 2016-10-04 | ND |
| 2017-01-04 | ND |
| 2017-01-04 | ND |
| 2017-04-04 | ND |
| 2017-08-04 | ND |
| 2017-08-04 | ND |
| 2017-10-19 | ND |
| 2018-01-24 | ND |
| 2018-01-24 | ND |
| 2018-04-02 | ND |
| 2018-07-11 | ND |
| 2018-10-26 | ND |
| 2019-01-30 | ND |
| 2019-01-30 | ND |
| 2019-05-16 | ND |
| 2019-08-28 | ND |
| 2019-08-28 | ND |
| 2019-10-23 | ND |