1,1,1,2-Tetrachloroethane
Golden State Water Company - Los Osos
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 |
|---|---|---|---|---|
| 2014 | N/A | 0 | 0 | N/A |
| 2015 | N/A | 0 | 0 | N/A |
| 2016 | N/A | 0 | 0 | N/A |
| 2017 | ND | 5 | 0 | ND |
| 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 |
|---|---|---|
| 2017-07-18 | 9590-019-1000 | ND |
| 2017-09-26 | 9590-019-0830 | ND |
| 2017-10-30 | 9590-019-1405 | ND |
| 2017-11-02 | 9590-019-1550 | ND |
| 2017-12-12 | 9590-019-1015 | ND |
| 2018-02-13 | 9590-019-0840 | ND |
| 2018-03-13 | 9590-019-1015 | ND |
| 2019-01-14 | 9590-019-1500 | ND |