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EWG's Tap Water Database — 2021 UPDATE

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1,1,1,2-Tetrachloroethane

Connecticut Water Company - Northern Region-Western System

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

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35

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
2014ND120ND
2015ND70ND
2016ND50ND
2017ND60ND
2018ND30ND
2019ND20ND

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
2014-01-24BG03077VOC1ND
2014-01-29BG04659VOC1ND
2014-02-07BG08003VOC1ND
2014-04-03BG27981VOC1ND
2014-04-094561VOC1ND
2014-05-21BG47680VOC1ND
2014-06-04BG53346VOC1ND
2014-06-06BG54002VOC1ND
2014-06-17BG60666VOC1ND
2014-06-19BG62968VOC1ND
2014-07-11BG73249VOC1ND
2014-11-21BH44966VOC1ND
2015-01-20BH64902VOC1ND
2015-03-06BH80296VOC1ND
2015-04-29BJ09906VOC1ND
2015-04-30BJ10443VOC1ND
2015-07-01BJ40227VOC1ND
2015-07-02BJ41078VOC1ND
2015-07-30BJ65812VOC1ND
2016-01-12BK51386VOC1ND
2016-01-15BK53768VOC1ND
2016-05-25BN40000VOC1ND
2016-06-09BN51878VOC1ND
2016-07-15BN73865VOC1ND
2017-02-08BX57435VOC1ND
2017-03-03BX79849VOC1ND
2017-03-03BX79851VOC1ND
2017-04-21BY07962VOC1ND
2017-06-01BY32099VOC1ND
2017-07-07BY54441VOC1ND
2018-01-23BZ78888VOC1ND
2018-01-31BZ82950VOC1ND
2018-07-13CA89901ND
2019-01-02VOC1 200517309ND
2019-03-15VOC1 200524883ND