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EWG's Tap Water Database — 2019 UPDATE

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Dichloromethane (methylene chloride)

Sunny Slope Water Company

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.

 

29

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

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

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
2012-03-149588-004-1000ND
2012-06-199588-012-0900ND
2012-09-129588-017-0950ND
2012-09-129588-003-0930ND
2012-11-299588-006-0945ND
2013-03-199588-004-0940ND
2013-06-269588-012-0855ND
2013-09-039588-017-1007ND
2013-09-039588-003-0955ND
2013-12-179588-006-0900ND
2014-03-039588-004-0930ND
2014-06-039588-012-0940ND
2014-09-169588-003-0925ND
2014-12-019588-006-0910ND
2015-03-199588-004-0910ND
2015-06-099588-012-1025ND
2015-06-099588-017-1010ND
2015-09-029588-003-0935ND
2015-12-099588-006-0910ND
2016-03-109588-004-0915ND
2016-06-089588-012-1005ND
2016-06-089588-017-1030ND
2016-09-129588-003-0930ND
2016-12-029588-006-1040ND
2017-03-069588-004-1040ND
2017-06-309588-012-1310ND
2017-06-309588-017-1335ND
2017-09-219588-003-0930ND
2017-12-289588-006-0835ND