1,1,1,2-Tetrachloroethane
Madison Water Department
1,1,1,2-Tetrachloroethane is a synthetic chemical used in metal degreasing and as an intermediate in industrial chemical production.
10
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 | 4 | 0 | ND |
2015 | N/A | 0 | 0 | N/A |
2016 | N/A | 0 | 0 | N/A |
2017 | N/A | 0 | 0 | N/A |
2018 | ND | 6 | 0 | ND |
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
Date | Lab ID | Result |
---|---|---|
2014-09-03 | L5211814-2 | ND |
2014-09-03 | L5211814-4 | ND |
2014-09-09 | L5240310-2 | ND |
2014-09-09 | L5240310-4 | ND |
2018-02-13 | JC60783-2 | ND |
2018-02-13 | JC60783-4 | ND |
2018-04-10 | JC64164-1 | ND |
2018-04-10 | JC64164-4 | ND |
2018-04-10 | JC64164-3 | ND |
2018-04-10 | JC64164-2 | ND |