1,1,1,2-Tetrachloroethane
California Water Service (CWS) - King City
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 | 1 | 0 | ND |
| 2016 | ND | 4 | 0 | ND |
| 2017 | ND | 1 | 0 | ND |
| 2018 | ND | 1 | 0 | ND |
| 2019 | ND | 5 | 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 |
|---|---|---|
| 2014-08-26 | 5701-014-1220 | ND |
| 2014-08-26 | 5701-015-1409 | ND |
| 2015-06-11 | 5701-008-1130 | ND |
| 2016-03-16 | 5701-006-1400 | ND |
| 2016-03-16 | 5701-012-1100 | ND |
| 2016-06-20 | 5701-014-1317 | ND |
| 2016-09-19 | 5701-007-1054 | ND |
| 2017-06-21 | 5701-015-1444 | ND |
| 2018-06-20 | 5701-008-1020 | ND |
| 2019-03-20 | 5810-012-1130 | ND |
| 2019-04-17 | 5701-006-1155 | ND |
| 2019-06-17 | 5701-014-1016 | ND |
| 2019-09-17 | 5701-007-1131 | ND |
| 2019-10-15 | 5701-006-1500 | ND |