1,1,1,2-Tetrachloroethane
Mountain Springs Water Supply Corporation
1,1,1,2-Tetrachloroethane is a synthetic chemical used in metal degreasing and as an intermediate in industrial chemical production.
25
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 |
|---|---|---|---|---|
| 2018 | ND | 4 | 0 | ND |
| 2019 | ND | 4 | 0 | ND |
| 2020 | ND | 5 | 0 | ND |
| 2021 | ND | 4 | 0 | ND |
| 2022 | ND | 4 | 0 | ND |
| 2023 | ND | 4 | 0 | ND |
ppb = parts per billion
State, National, and Health Guidelines for Drinking Water
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 |
|---|---|---|
| 2018-03-13 | Q1810191003 | ND |
| 2018-03-13 | Q1810191005 | ND |
| 2018-03-13 | Q1810191001 | ND |
| 2018-06-28 | Q1826059002 | ND |
| 2019-01-28 | Q1904051006 | ND |
| 2019-01-28 | Q1904051008 | ND |
| 2019-01-28 | Q1904051010 | ND |
| 2019-01-28 | Q1904051012 | ND |
| 2020-05-13 | Q2019339010 | ND |
| 2020-09-29 | Q2038336001 | ND |
| 2020-11-05 | Q2043235022 | ND |
| 2020-11-05 | Q2043235008 | ND |
| 2020-11-05 | Q2043235004 | ND |
| 2021-11-16 | Q2132004001 | ND |
| 2021-11-16 | Q2132004003 | ND |
| 2021-11-16 | Q2132004005 | ND |
| 2021-11-16 | Q2132004007 | ND |
| 2022-10-18 | Q2231735009 | ND |
| 2022-10-18 | Q2231735011 | ND |
| 2022-10-18 | Q2231735013 | ND |
| 2022-10-18 | Q2231735015 | ND |
| 2023-11-30 | Q2351033007 | ND |
| 2023-11-30 | Q2351033009 | ND |
| 2023-11-30 | Q2351033011 | ND |
| 2023-12-13 | Q2353413003 | ND |