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EWG's Tap Water Database — 2021 UPDATE

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1,1,2,2-Tetrachloroethane

City of Katy

1,1,2,2-Tetrachloroethane is an industrial chemical which has been used as a metal degreaser, and in paint, paint removers, mothballs and pesticides. It damages the liver and nervous system, and may cause cancer.

MORE ABOUT THIS CONTAMINANT

 

33

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
2014ND10ND
2015ND70ND
2016ND80ND
2017ND60ND
2018ND60ND
2019ND50ND

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.1 ppb

The EWG Health Guideline of 0.1 ppb for 1,1,2,2-tetrachloroethane was defined by the California Office of Environmental Health Hazard Assessment as a public health goal, the level of a drinking water contaminant that does not pose a significant health risk. This health guideline protects against cancer.

ppb = parts per billion

All test results

Date Lab ID Result
2014-07-25AC61114ND
2015-01-20AC76792ND
2015-01-20AC76782ND
2015-01-20AC76772ND
2015-01-20AC76776ND
2015-01-20AC76774ND
2015-05-28AC93617ND
2015-05-28AC93621ND
2016-01-14AD18225ND
2016-01-14AD18223ND
2016-01-14AD18231ND
2016-01-14AD18263ND
2016-01-14AD18229ND
2016-03-15AD28802ND
2016-07-18AD44547ND
2016-10-07AD52842ND
2017-02-09AD69958ND
2017-02-09AD69938ND
2017-02-09AD69952ND
2017-02-09AD69942ND
2017-02-09AD69940ND
2017-02-09AD70006ND
2018-01-08AE08054ND
2018-01-08AE08058ND
2018-01-08AE08056ND
2018-01-08AE08060ND
2018-01-08AE08062ND
2018-01-08AE08052ND
2019-01-14AE49623ND
2019-01-14AE49613ND
2019-01-14AE49629ND
2019-01-14AE49617ND
2019-01-14AE49615ND