Know Your Environment. Protect Your Health.

1,1,1,2-Tetrachloroethane

Danbury Water Department

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

 

13

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND20ND
2019ND20ND
2020ND30ND
2021ND20ND
2022ND20ND
2023ND20ND

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
2018-02-21210745GEND
2018-02-21210744GEND
2019-08-15VOC1 200545121ND
2019-08-15VOC1 200545122ND
2020-02-20VOC1 200566893ND
2020-02-20VOC1 200566892ND
2020-02-21VOC1 200566982ND
2021-01-21VOC1 200604571ND
2021-01-21VOC1 200604570ND
2022-01-20279326ND
2022-01-20279325ND
2023-02-09306232ND
2023-02-09306231ND