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EWG's Tap Water Database — 2019 UPDATE

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1,1,1,2-Tetrachloroethane

St. Louis City

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

 

11

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND20ND
2013ND20ND
2014ND20ND
2015ND20ND
2016ND30ND
2017N/A00N/A

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
2012-06-28CRCW062812M524ND
2012-06-28HBCB062812M524ND
2013-10-22CRCW102213M524ND
2013-10-22HBCB102213M524ND
2014-05-28AC26115ND
2014-05-28AC26114ND
2015-06-01AC47391ND
2015-06-01AC47390ND
2016-06-06AC75867ND
2016-06-06AC77510ND
2016-06-06AC75866ND