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EWG's Tap Water Database — 2019 UPDATE

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Dichloromethane (methylene chloride)

Washington Aqueduct Division

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.

 

142

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND240ND
2013ND240ND
2014ND240ND
2015ND240ND
2016ND240ND
2017ND220ND

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
2012-01-01DalecarliaND
2012-01-01McMillanND
2012-02-01DalecarliaND
2012-02-01McMillanND
2012-03-01DalecarliaND
2012-03-01McMillanND
2012-04-01DalecarliaND
2012-04-01McMillanND
2012-05-01DalecarliaND
2012-05-01McMillanND
2012-06-01DalecarliaND
2012-06-01McMillanND
2012-07-01DalecarliaND
2012-07-01McMillanND
2012-08-01DalecarliaND
2012-08-01McMillanND
2012-09-01DalecarliaND
2012-09-01McMillanND
2012-10-01DalecarliaND
2012-10-01McMillanND
2012-11-01DalecarliaND
2012-11-01McMillanND
2012-12-01DalecarliaND
2012-12-01McMillanND
2013-01-01DalecarliaND
2013-01-01McMillanND
2013-02-01DalecarliaND
2013-02-01McMillanND
2013-03-01DalecarliaND
2013-03-01McMillanND
2013-04-01DalecarliaND
2013-04-01McMillanND
2013-05-01DalecarliaND
2013-05-01McMillanND
2013-06-01DalecarliaND
2013-06-01McMillanND
2013-07-01DalecarliaND
2013-07-01McMillanND
2013-08-01DalecarliaND
2013-08-01McMillanND
2013-09-01DalecarliaND
2013-09-01McMillanND
2013-10-01DalecarliaND
2013-10-01McMillanND
2013-11-01DalecarliaND
2013-11-01McMillanND
2013-12-01DalecarliaND
2013-12-01McMillanND
2014-01-01DalecarliaND
2014-01-01McMillanND
2014-02-01DalecarliaND
2014-02-01McMillanND
2014-03-01DalecarliaND
2014-03-01McMillanND
2014-04-01DalecarliaND
2014-04-01McMillanND
2014-05-01DalecarliaND
2014-05-01McMillanND
2014-06-01DalecarliaND
2014-06-01McMillanND
2014-07-01DalecarliaND
2014-07-01McMillanND
2014-08-01DalecarliaND
2014-08-01McMillanND
2014-09-01DalecarliaND
2014-09-01McMillanND
2014-10-01DalecarliaND
2014-10-01McMillanND
2014-11-01DalecarliaND
2014-11-01McMillanND
2014-12-01DalecarliaND
2014-12-01McMillanND
2015-01-01DalecarliaND
2015-01-01McMillanND
2015-02-01DalecarliaND
2015-02-01McMillanND
2015-03-01DalecarliaND
2015-03-01McMillanND
2015-04-01DalecarliaND
2015-04-01McMillanND
2015-05-01DalecarliaND
2015-05-01McMillanND
2015-06-01DalecarliaND
2015-06-01McMillanND
2015-07-01DalecarliaND
2015-07-01McMillanND
2015-08-01DalecarliaND
2015-08-01McMillanND
2015-09-01DalecarliaND
2015-09-01McMillanND
2015-10-01DalecarliaND
2015-10-01McMillanND
2015-11-01DalecarliaND
2015-11-01McMillanND
2015-12-01DalecarliaND
2015-12-01McMillanND
2016-01-01DalecarliaND
2016-01-01McMillanND
2016-02-01DalecarliaND
2016-02-01McMillanND
2016-03-01DalecarliaND
2016-03-01McMillanND
2016-04-01DalecarliaND
2016-04-01McMillanND
2016-05-01DalecarliaND
2016-05-01McMillanND
2016-06-01DalecarliaND
2016-06-01McMillanND
2016-07-01DalecarliaND
2016-07-01McMillanND
2016-08-01DalecarliaND
2016-08-01McMillanND
2016-09-01DalecarliaND
2016-09-01McMillanND
2016-10-01DalecarliaND
2016-10-01McMillanND
2016-11-01DalecarliaND
2016-11-01McMillanND
2016-12-01DalecarliaND
2016-12-01McMillanND
2017-01-01DalecarliaND
2017-01-01McMillanND
2017-02-01DalecarliaND
2017-02-01McMillanND
2017-03-01DalecarliaND
2017-03-01McMillanND
2017-04-01DalecarliaND
2017-04-01McMillanND
2017-05-01DalecarliaND
2017-05-01McMillanND
2017-06-01DalecarliaND
2017-06-01McMillanND
2017-07-01DalecarliaND
2017-07-01McMillanND
2017-08-01DalecarliaND
2017-08-01McMillanND
2017-09-01DalecarliaND
2017-09-01McMillanND
2017-10-01DalecarliaND
2017-10-01McMillanND
2017-11-01DalecarliaND
2017-12-01DalecarliaND