1,1,1,2-Tetrachloroethane
High Meadows Ranch Water Supply
1,1,1,2-Tetrachloroethane is a synthetic chemical used in metal degreasing and as an intermediate in industrial chemical production.
17
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 | 1 | 0 | ND |
2015 | ND | 2 | 0 | ND |
2016 | ND | 2 | 0 | ND |
2017 | ND | 6 | 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 |
---|---|---|
2014-06-25 | AC58033 | ND |
2015-07-07 | AC98573 | ND |
2015-07-07 | AC98561 | ND |
2016-12-09 | AD61950 | ND |
2016-12-09 | AD61948 | ND |
2017-03-15 | AD75196 | ND |
2017-03-15 | AD75194 | ND |
2017-03-15 | AD75192 | ND |
2017-05-01 | AD81868 | ND |
2017-07-28 | AD91365 | ND |
2017-11-16 | AE05196 | ND |
2018-04-09 | AE21724 | ND |
2018-04-09 | AE21718 | ND |
2018-04-09 | AE21716 | ND |
2019-11-18 | AE89591 | ND |
2019-11-18 | AE89593 | ND |
2019-11-18 | AE89595 | ND |