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EWG's Tap Water Database — 2021 UPDATE

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1,1,1-Trichloroethane

North Wales Water Authority

1,1,1-Trichloroethane is a solvent and a degreasing agent used for manufacturing metal products and as ingredient in cleaners and aerosols. Exposure to 1,1,1-trichloroethane can harm the nervous system, liver and circulatory system.

MORE ABOUT THIS CONTAMINANT

 

77

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND120ND
2015ND130ND
2016ND140ND
2017ND130ND
2018ND130ND
2019ND120ND

ppb = parts per billion

State and national drinking water standards and health guidelines

EPA Maximum Contaminant
Level (MCL) 200 ppb

The legal limit for 1,1,1-trichloroethane, established in 1987, was based on toxicity studies conducted in laboratory animals in the 1970s and 1980s.

ppb = parts per billion

All test results

Date Lab ID Result
2014-03-0420140745ND
2014-03-1720140959ND
2014-03-1720140958ND
2014-03-1720140966ND
2014-03-1720140965ND
2014-03-1720140964ND
2014-03-1720140963ND
2014-03-1720140962ND
2014-03-1720140961ND
2014-03-1720140960ND
2014-06-1020141963ND
2014-08-0520142640ND
2015-03-1012516867ND
2015-03-1612516762ND
2015-03-1612516846ND
2015-03-1612516825ND
2015-03-1612516804ND
2015-03-1612516783ND
2015-03-1612516741ND
2015-03-1612516720ND
2015-03-1612516699ND
2015-03-1612516678ND
2015-07-0613014449ND
2015-09-1413265889ND
2015-12-0113634672ND
2016-03-0713987497ND
2016-03-1413987434ND
2016-03-1413987476ND
2016-03-1413987455ND
2016-03-1413987413ND
2016-03-1413987392ND
2016-03-1413987371ND
2016-03-1413987350ND
2016-03-1413987329ND
2016-03-1413987308ND
2016-06-0714407378ND
2016-06-2914407405ND
2016-09-0614909854ND
2016-12-0615374022ND
2017-03-1615797865ND
2017-05-0116096371ND
2017-05-0116096350ND
2017-05-0116096287ND
2017-05-0116096455ND
2017-05-0116096308ND
2017-05-0116096434ND
2017-05-0116096413ND
2017-05-0116096329ND
2017-05-0116096392ND
2017-06-0616259056ND
2017-09-0516728656ND
2017-12-0517163818ND
2018-03-1220180936ND
2018-03-1220180937ND
2018-03-1220180935ND
2018-03-1220180938ND
2018-03-1220180934ND
2018-03-1220180939ND
2018-03-1220180933ND
2018-03-1220180940ND
2018-03-1220180932ND
2018-03-1320180956ND
2018-06-0520182148ND
2018-09-0420183373ND
2018-12-1820184775ND
2019-03-0520190857ND
2019-03-1220190961ND
2019-03-1220190960ND
2019-03-1220190962ND
2019-03-1220190959ND
2019-03-1220190963ND
2019-03-1220190958ND
2019-03-1220190964ND
2019-03-1220190957ND
2019-03-1220190956ND
2019-09-0320193443ND
2019-12-0320194748ND