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EWG's Tap Water Database — 2021 UPDATE

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1,1,1-Trichloroethane

Danville

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.

 

9

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND20ND
2015ND10ND
2016ND20ND
2017ND20ND
2018ND10ND
2019ND10ND

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
2014-03-1814079006801ND
2014-11-1814324003901ND
2015-10-2115295005501ND
2016-01-1216015000209ND
2016-10-1216288004601ND
2017-01-1117013000201ND
2017-10-1617292000601ND
2018-10-0818283004201ND
2019-01-1619017008009ND