1,1,1,2-Tetrachloroethane
City of La Palma
1,1,1,2-Tetrachloroethane is a synthetic chemical used in metal degreasing and as an intermediate in industrial chemical production.
14
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 | 2 | 0 | ND |
| 2015 | ND | 2 | 0 | ND |
| 2016 | ND | 1 | 0 | ND |
| 2017 | ND | 4 | 0 | ND |
| 2018 | ND | 3 | 0 | ND |
| 2019 | ND | 2 | 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 |
|---|---|---|
| 2014-02-03 | 4417-006-0925 | ND |
| 2014-05-05 | 4417-001-1140 | ND |
| 2015-03-02 | 4417-006-0945 | ND |
| 2015-05-04 | 4417-001-0835 | ND |
| 2016-02-08 | 4417-006-0850 | ND |
| 2017-01-30 | 4417-006-1040 | ND |
| 2017-03-06 | 4417-001-1140 | ND |
| 2017-05-01 | 4417-001-0915 | ND |
| 2017-07-03 | 4417-001-0815 | ND |
| 2018-02-05 | 4417-006-0835 | ND |
| 2018-03-05 | 4417-001-0835 | ND |
| 2018-04-02 | 4417-001-0825 | ND |
| 2019-02-04 | 4417-001-0820 | ND |
| 2019-02-04 | 4417-006-0840 | ND |