1,1,1,2-Tetrachloroethane
City of Antioch
1,1,1,2-Tetrachloroethane is a synthetic chemical used in metal degreasing and as an intermediate in industrial chemical production.
8
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 | N/A | 0 | 0 | N/A |
| 2015 | N/A | 0 | 0 | N/A |
| 2016 | ND | 5 | 0 | ND |
| 2017 | N/A | 0 | 0 | N/A |
| 2018 | ND | 2 | 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
| Date | Lab ID | Result |
|---|---|---|
| 2016-10-03 | 9590-008-1120 | ND |
| 2016-10-03 | 9590-010-1350 | ND |
| 2016-10-03 | 9590-016-0945 | ND |
| 2016-10-04 | 9590-004-1215 | ND |
| 2016-10-04 | 9590-009-1410 | ND |
| 2018-02-26 | 9590-001-1350 | ND |
| 2018-06-04 | 9590-001-1206 | ND |
| 2019-06-06 | 9590-001-0800 | ND |