1,1,1,2-Tetrachloroethane
Cherry Valley/ Rochdale Water District
NOTE: Cherry Valley/ Rochdale Water District purchases water from Worcester Department of Public Works which is required to test for 1,1,1,2-tetrachloroethane. Sample information shown below was taken by Worcester Department of Public Works.
1,1,1,2-Tetrachloroethane is a synthetic chemical used in metal degreasing and as an intermediate in industrial chemical production.
Samples
Samples exceeding legal limit (MCL)
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2014 | ND | 4 | 0 | ND |
| 2015 | ND | 4 | 0 | ND |
| 2016 | ND | 3 | 0 | ND |
| 2017 | ND | 2 | 0 | ND |
| 2018 | N/A | 0 | 0 | N/A |
| 2019 | N/A | 0 | 0 | N/A |
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
NOTE: Cherry Valley/ Rochdale Water District purchases water from Worcester Department of Public Works which is required to test for 1,1,1,2-tetrachloroethane. Sample information shown below was taken by Worcester Department of Public Works.
| Date | Result |
|---|---|
| 2015-05-28 | ND |
| 2016-05-24 | ND |
| 2016-06-22 | ND |
| 2016-07-04 | ND |
| 2017-02-21 | ND |
| 2017-05-10 | ND |