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EWG's Tap Water Database — 2021 UPDATE

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Dichloromethane (methylene chloride)

Valencia 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.

 

123

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
2014ND220ND
2015ND210ND
2016ND220ND
2017ND220ND
2018ND140ND
2019ND220ND

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
2014-02-269590-048-0915ND
2014-05-289590-048-0915ND
2014-08-289590-048-0940ND
2014-11-089590-021-0830ND
2014-11-089590-024-1135ND
2014-11-089590-052-0930ND
2014-11-089590-062-0815ND
2014-11-139590-005-0950ND
2014-11-139590-017-0940ND
2014-11-139590-018-0900ND
2014-11-139590-025-1050ND
2014-11-139590-026-0845ND
2014-11-139590-046-1100ND
2014-11-139590-049-0900ND
2014-11-139590-051-1010ND
2014-11-139590-058-0920ND
2014-11-139590-070-1025ND
2014-11-209590-003-1115ND
2014-11-209590-004-0930ND
2014-11-209590-047-1030ND
2014-11-209590-048-1015ND
2014-11-209590-073-0915ND
2015-02-199590-048-0950ND
2015-06-049590-048-1000ND
2015-08-279590-048-0918ND
2015-11-059590-005-0932ND
2015-11-059590-018-0951ND
2015-11-059590-021-0815ND
2015-11-059590-024-0854ND
2015-11-059590-026-0910ND
2015-11-059590-058-1012ND
2015-11-059590-062-0828ND
2015-11-129590-017-0950ND
2015-11-129590-025-0818ND
2015-11-129590-046-0907ND
2015-11-129590-049-0932ND
2015-11-129590-051-1015ND
2015-11-129590-070-0838ND
2015-11-309590-003-0903ND
2015-11-309590-004-1014ND
2015-11-309590-047-1006ND
2015-11-309590-048-0920ND
2015-11-309590-073-0845ND
2016-02-259590-048-0928ND
2016-03-039590-052-0910ND
2016-05-269590-048-0959ND
2016-11-039590-005-1000ND
2016-11-039590-018-1030ND
2016-11-039590-021-0820ND
2016-11-039590-024-0940ND
2016-11-039590-026-0950ND
2016-11-039590-052-0920ND
2016-11-039590-058-1040ND
2016-11-039590-062-0900ND
2016-11-099590-017-1036ND
2016-11-099590-025-0926ND
2016-11-099590-046-1007ND
2016-11-099590-049-0910ND
2016-11-099590-051-1054ND
2016-11-099590-070-0943ND
2016-11-179590-003-0922ND
2016-11-179590-004-0954ND
2016-11-179590-047-0943ND
2016-11-179590-048-1006ND
2016-11-179590-073-0903ND
2017-02-239590-048-0948ND
2017-08-249590-048-0915ND
2017-10-269590-048-0900ND
2017-11-029590-005-1005ND
2017-11-029590-018-0940ND
2017-11-029590-021-0855ND
2017-11-029590-024-1020ND
2017-11-029590-026-1215ND
2017-11-029590-052-0920ND
2017-11-029590-058-0955ND
2017-11-029590-062-0905ND
2017-11-169590-017-1130ND
2017-11-169590-025-1010ND
2017-11-169590-046-1030ND
2017-11-169590-049-1115ND
2017-11-169590-051-1150ND
2017-11-169590-070-1050ND
2017-11-309590-003-1000ND
2017-11-309590-004-0900ND
2017-11-309590-047-0850ND
2017-11-309590-048-0945ND
2017-11-309590-073-0920ND
2018-11-072104-005-0923ND
2018-11-072104-018-0941ND
2018-11-072104-021-0830ND
2018-11-072104-025-0857ND
2018-11-072104-026-0909ND
2018-11-072104-052-0910ND
2018-11-072104-058-0954ND
2018-11-072104-062-0845ND
2018-11-142104-017-1005ND
2018-11-142104-025-0940ND
2018-11-142104-046-0855ND
2018-11-142104-049-0950ND
2018-11-142104-051-1030ND
2018-11-142104-070-0920ND
2019-02-122104-003-0900ND
2019-02-122104-004-0830ND
2019-02-122104-047-0840ND
2019-02-122104-073-0950ND
2019-11-062104-018-0825ND
2019-11-062104-021-0926ND
2019-11-062104-026-0900ND
2019-11-062104-052-0840ND
2019-11-062104-058-1000ND
2019-11-062104-062-0908ND
2019-11-142104-017-1100ND
2019-11-142104-025-0935ND
2019-11-142104-046-0840ND
2019-11-142104-049-0915ND
2019-11-142104-051-0940ND
2019-11-142104-070-0920ND
2019-11-202104-003-0900ND
2019-11-202104-004-0940ND
2019-11-202104-047-0920ND
2019-11-202104-073-0930ND
2019-11-219590-048-1120ND
2019-11-252104-005-1030ND