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EWG's Tap Water Database — 2019 UPDATE

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Dichloromethane (methylene chloride)

City of Brighton

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.

 

32

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND70ND
2013ND120ND
2014ND40ND
2015ND50ND
2016ND20ND
2017ND20ND

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 Result
2012-02-27ND
2012-05-09ND
2012-06-29ND
2012-08-16ND
2012-09-17ND
2012-09-17ND
2012-10-16ND
2013-03-18ND
2013-03-18ND
2013-03-18ND
2013-04-12ND
2013-04-12ND
2013-05-13ND
2013-05-13ND
2013-06-12ND
2013-07-08ND
2013-07-08ND
2013-09-30ND
2013-11-22ND
2014-04-28ND
2014-04-28ND
2014-09-17ND
2014-11-13ND
2015-02-18ND
2015-04-13ND
2015-04-13ND
2015-09-01ND
2015-11-03ND
2016-01-04ND
2016-01-04ND
2017-04-05ND
2017-04-05ND