Know Your Environment. Protect Your Health.

1,1,1,2-Tetrachloroethane

Westminster Water Supply Corporation

1,1,1,2-Tetrachloroethane is a synthetic chemical used in metal degreasing and as an intermediate in industrial chemical production.

 

19

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND30ND
2019ND40ND
2020ND30ND
2021ND30ND
2022ND30ND
2023ND30ND

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
2018-06-20Q1824691016ND
2018-06-20Q1824691013ND
2018-08-23Q1834033004ND
2019-02-12Q1906728001ND
2019-02-12Q1906728003ND
2019-02-12Q1906728005ND
2019-05-14Q1924859004ND
2020-08-05Q2030915005ND
2020-08-05Q2030915003ND
2020-08-05Q2030915001ND
2021-12-06Q2133784016ND
2021-12-06Q2133784018ND
2021-12-06Q2133784020ND
2022-05-11Q2214188003ND
2022-05-11Q2214188005ND
2022-05-11Q2214188007ND
2023-08-15Q2334073002ND
2023-08-15Q2334073004ND
2023-08-15Q2334073010ND