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EWG's Tap Water Database — 2019 UPDATE

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Dichloromethane (methylene chloride)

Moore

Methylene chloride is a common industrial solvent used for paint stripping, vapor degreasing, printing, electronics manufacturing and cleaning. It causes cancer and liver damage in animal studies. Read More.

Surface and groundwater can be contaminated with methylene chloride from industrial releases and landfill leaching. The EPA considers methylene chloride likely carcinogenic to people. Long-term ingestion of drinking water with methylene chloride contamination can cause liver damage and cancer. Occupational exposure to methylene chloride and other solvents has been linked with increased risk of miscarriage. Birth defects have also been observed in studies of laboratory animals exposed to methylene chloride during pregnancy.

Click here to read more about carcinogenic VOCs.

 

90

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND40ND
20130.0870 ppb101ND - 0.870 ppb
20140.104 ppb121ND - 1.25 ppb
20150.311 ppb185ND - 2.22 ppb
20160.193 ppb245ND - 1.01 ppb
20170.217 ppb223ND - 1.72 ppb

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 4 ppb

The EWG Health Guideline of 4 ppb for dichloromethane (methylene chloride) was defined by the California Office of Environmental Health Hazard Assessment as a public health goal, the level of a drinking water contaminant that does not pose a significant health risk. This health guideline protects against cancer.

EPA Maximum Contaminant
Level (MCL) 5 ppb

The legal limit for dichloromethane, established in 1992, was based on analytical detection limits at the time that the standard was set.

ppb = parts per billion

All test results

Date Lab ID Result
2012-02-152B16058-04ND
2012-02-152B16058-03ND
2012-02-152B16058-02ND
2012-02-152B16058-01ND
2013-03-293D02074-01ND
2013-06-253F25067-06ND
2013-06-253F25067-030.870 ppb
2013-06-253F25067-02ND
2013-06-253F25067-01ND
2013-09-283I30025-02ND
2013-09-283I30025-01ND
2013-11-253K26108-03ND
2013-11-253K26108-02ND
2013-11-253K26108-01ND
2014-03-134C14011-08ND
2014-03-134C14011-05ND
2014-05-294E30010-06ND
2014-05-294E30010-05ND
2014-08-114H12133-02ND
2014-08-114H12133-01ND
2014-08-114H12133-031.25 ppb
2014-08-114H12133-04ND
2014-08-114H12133-05ND
2014-12-044L05007-06RE1ND
2014-12-044L05007-05RE1ND
2014-12-044L05007-04RE1ND
2015-03-165C17090-04ND
2015-03-165C17090-030.680 ppb
2015-03-165C17090-02ND
2015-03-165C17090-010.540 ppb
2015-06-245F26009-04ND
2015-06-245F26009-011.29 ppb
2015-06-245F26009-02ND
2015-06-245F26009-03ND
2015-08-175H18116-08ND
2015-08-175H18116-072.22 ppb
2015-12-085L08161-10ND
2015-12-085L08161-09ND
2015-12-085L08161-08ND
2015-12-085L08161-04ND
2015-12-225L22074-01ND
2015-12-225L22074-020.860 ppb
2015-12-225L22074-03ND
2015-12-225L22074-04ND
2016-02-226B23061-05ND
2016-02-226B23061-03ND
2016-02-236B23061-04ND
2016-03-246C25003-05ND
2016-03-246C25003-040.910 ppb
2016-03-246C25003-031.000 ppb
2016-03-246C25003-02ND
2016-03-246C25003-011.01 ppb
2016-04-286D29012-03ND
2016-04-286D29012-01ND
2016-04-286D29012-02ND
2016-04-286D29012-04ND
2016-04-286D29012-05ND
2016-08-186H19015-06ND
2016-08-186H19015-05ND
2016-08-186H19015-04ND
2016-08-186H19015-03ND
2016-08-186H19015-01ND
2016-12-286L29046-02ND
2016-12-286L29046-01ND
2016-12-286L29046-030.880 ppb
2016-12-286L29046-050.820 ppb
2016-12-286L29046-06ND
2016-12-286L29046-04ND
2017-03-237C24009-06ND
2017-03-237C24009-05ND
2017-03-237C24009-04ND
2017-03-237C24009-031.72 ppb
2017-03-237C24009-02ND
2017-03-237C24009-01ND
2017-06-297F29076-031.37 ppb
2017-06-297F29076-02ND
2017-06-297F29076-04ND
2017-06-297F29076-05ND
2017-06-307G03081-02ND
2017-06-307G03081-01ND
2017-09-117I12038-051.69 ppb
2017-10-317K01144-01ND
2017-10-317K01144-09ND
2017-10-317K01144-08ND
2017-10-317K01144-07ND
2017-10-317K01144-06ND
2017-10-317K01144-05ND
2017-10-317K01144-04ND
2017-10-317K01144-03ND
2017-10-317K01144-02ND