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EWG's Tap Water Database — 2019 UPDATE

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1,1,2,2-Tetrachloroethane

Concord Water Department

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.

 

23

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND50ND
2013ND40ND
2014ND40ND
2015ND50ND
2016ND50ND
2017N/A00N/A

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
2012-08-16113258.01ND
2012-10-23115341.01ND
2012-10-23115341.02ND
2012-10-23115341.03ND
2012-10-23115341.04ND
2013-10-23125755.04ND
2013-10-23125755.03ND
2013-10-23125755.02ND
2013-10-23125755.01ND
2014-10-31137495.04ND
2014-10-31137495.03ND
2014-10-31137495.02ND
2014-10-31137495.01ND
2015-08-07146612.01ND
2015-10-15149110.04ND
2015-10-15149110.03ND
2015-10-15149110.02ND
2015-10-15149110.01ND
2016-08-05159131.01ND
2016-10-07161374.02ND
2016-10-07161374.03ND
2016-10-07161374.04ND
2016-10-07161374.05ND