Know Your Environment. Protect Your Health.

1,1,1,2-Tetrachloroethane

Silverdale Water District 16

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

 

12

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND10ND
2019N/A00N/A
2020N/A00N/A
2021ND100ND
2022ND10ND
2023N/A00N/A

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
2018-09-04ND
2021-06-224142809ND
2021-06-224149408ND
2021-06-234142808ND
2021-06-234142810ND
2021-06-234142806ND
2021-06-234142807ND
2021-09-154178922ND
2021-09-154178921ND
2021-09-204178920ND
2021-12-064213471ND
2022-07-254419133ND