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EWG's Tap Water Database — 2021 UPDATE

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1,1,1-Trichloroethane

City of San Jose - EVG/EDV/COY

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

 

32

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
20140.311 ppb167ND - 0.820 ppb
2015ND20ND
2016ND20ND
20170.133 ppb91ND - 1.20 ppb
2018ND10ND
2019ND20ND

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
2014-01-219590-006-0839ND
2014-01-219590-005-0914ND
2014-02-189588-012-0902ND
2014-03-271610-004-09000.780 ppb
2014-03-271610-003-08100.550 ppb
2014-03-271610-002-1000ND
2014-03-271610-001-1130ND
2014-04-151610-013-0852ND
2014-04-151610-011-0935ND
2014-06-251610-004-11300.810 ppb
2014-06-251610-003-07350.630 ppb
2014-08-051610-007-0920ND
2014-09-091610-004-09200.820 ppb
2014-09-091610-003-07540.600 ppb
2014-12-091610-004-08520.790 ppb
2014-12-091610-003-0805ND
2015-06-091610-003-0740ND
2015-09-081610-004-0826ND
2016-06-141610-003-0750ND
2016-09-131610-004-0852ND
2017-01-171610-001-1036ND
2017-01-171610-002-0835ND
2017-01-171610-004-0925ND
2017-01-311610-003-0819ND
2017-05-021610-011-1006ND
2017-05-161610-012-1145ND
2017-06-131610-003-0806ND
2017-09-125867-004-09431.20 ppb
2017-09-261610-013-1030ND
2018-05-291610-003-0815ND
2019-05-141610-012-0949ND
2019-05-281610-003-0740ND