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EWG's Tap Water Database — 2021 UPDATE

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1,1,1-Trichloroethane

Atascadero Mutual Water Company

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
2014ND10ND
2015ND20ND
2016ND130ND
2017ND10ND
2018ND20ND
2019ND130ND

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
2014-05-083761-042-1030ND
2015-06-043761-020-0845ND
2015-09-033761-016-0845ND
2016-02-113761-023-0840ND
2016-02-113761-044-1012ND
2016-04-283761-001-1010ND
2016-04-283761-015-0920ND
2016-04-283761-050-0910ND
2016-05-033761-006-0915ND
2016-07-053761-012-0820ND
2016-07-053761-018-0840ND
2016-07-053761-007-1030ND
2016-07-283761-053-0825ND
2016-07-283761-009-0750ND
2016-07-283761-054-0845ND
2016-07-283761-040-0805ND
2017-05-163761-042-1005ND
2018-06-073761-020-1015ND
2018-09-133761-016-0850ND
2019-02-123761-023-0900ND
2019-02-143761-044-0948ND
2019-04-163761-001-0900ND
2019-04-163761-015-0845ND
2019-05-093761-006-0835ND
2019-05-163761-050-0755ND
2019-07-183761-040-0940ND
2019-07-183761-018-1010ND
2019-07-183761-012-1018ND
2019-07-183761-009-0835ND
2019-07-183761-053-0905ND
2019-07-183761-007-0950ND
2019-07-183761-054-0930ND