1,1,1,2-Tetrachloroethane
Concord Water Department
1,1,1,2-Tetrachloroethane is a synthetic chemical used in metal degreasing and as an intermediate in industrial chemical production.
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 | ND | 5 | 0 | ND |
2016 | ND | 5 | 0 | ND |
2017 | N/A | 0 | 0 | N/A |
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
Date | Lab ID | Result |
---|---|---|
2014-10-31 | 137495.01 | ND |
2014-10-31 | 137495.02 | ND |
2014-10-31 | 137495.03 | ND |
2014-10-31 | 137495.04 | ND |
2015-08-07 | 146612.01 | ND |
2015-10-15 | 149110.01 | ND |
2015-10-15 | 149110.02 | ND |
2015-10-15 | 149110.03 | ND |
2015-10-15 | 149110.04 | ND |
2016-08-05 | 159131.01 | ND |
2016-10-07 | 161374.02 | ND |
2016-10-07 | 161374.03 | ND |
2016-10-07 | 161374.04 | ND |
2016-10-07 | 161374.05 | ND |