1,1,1,2-Tetrachloroethane
Merrimack Village District
1,1,1,2-Tetrachloroethane is a synthetic chemical used in metal degreasing and as an intermediate in industrial chemical production.
18
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 | 4 | 0 | ND |
| 2015 | ND | 4 | 0 | ND |
| 2016 | ND | 2 | 0 | ND |
| 2017 | ND | 2 | 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 |
|---|---|---|
| 2014-04-07 | 14040103-002 | ND |
| 2014-04-07 | 14040103-003 | ND |
| 2014-04-07 | 14040103-004 | ND |
| 2014-04-07 | 14040103-001 | ND |
| 2015-04-07 | 15040059-001 | ND |
| 2015-04-07 | 15040059-002 | ND |
| 2015-04-14 | 15040142-001 | ND |
| 2015-04-14 | 15040142-002 | ND |
| 2016-04-21 | 16040293-001 | ND |
| 2016-04-21 | 16040292-001 | ND |
| 2017-05-09 | 17050144-001 | ND |
| 2017-05-09 | 17050143-001 | ND |
| 2018-04-05 | 18040073-001 | ND |
| 2018-04-05 | 18040074-001 | ND |
| 2018-04-05 | 18040075-001 | ND |
| 2019-06-14 | 19060223-001 | ND |
| 2019-06-14 | 19060224-001 | ND |
| 2019-06-14 | 19060225-001 | ND |