1,1,1,2-Tetrachloroethane
Twin Buttes Water System
NOTE: Twin Buttes Water System purchases water from City of San Angelo which is required to test for 1,1,1,2-tetrachloroethane. Sample information shown below was taken by City of San Angelo.
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 |
---|---|---|---|---|
2014 | ND | 9 | 0 | ND |
2015 | ND | 1 | 0 | ND |
2016 | ND | 2 | 0 | ND |
2017 | ND | 1 | 0 | ND |
2018 | ND | 1 | 0 | ND |
2019 | ND | 1 | 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
NOTE: Twin Buttes Water System purchases water from City of San Angelo which is required to test for 1,1,1,2-tetrachloroethane. Sample information shown below was taken by City of San Angelo.
Date | Lab ID | Result |
---|---|---|
2014-04-29 | AC52069 | ND |
2014-04-29 | AC52067 | ND |
2014-04-29 | AC52065 | ND |
2014-04-29 | AC52063 | ND |
2014-04-29 | AC52037 | ND |
2014-04-29 | AC52059 | ND |
2014-04-29 | AC52039 | ND |
2014-04-29 | AC52071 | ND |
2014-08-11 | AC63095 | ND |
2015-08-12 | AD03968 | ND |
2016-02-17 | AD24323 | ND |
2016-05-17 | AD37069 | ND |
2016-07-20 | AD45007 | ND |
2016-11-09 | AD57412 | ND |
2017-05-09 | Q1719085002 | ND |
2018-02-28 | Q1808687007 | ND |
2019-05-07 | Q1920785002 | ND |