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EWG's Tap Water Database — 2019 UPDATE

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Dichloromethane (methylene chloride)

City of Lexington

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.

 

21

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND60ND
2013ND40ND
2014ND10ND
2015ND40ND
2016ND40ND
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 Lab ID Result
2012-03-05153190ND
2012-03-05153191ND
2012-03-05153193ND
2012-03-05153194ND
2012-09-10186523ND
2012-09-10186524ND
2013-03-04215262ND
2013-03-04215263ND
2013-03-04215264ND
2013-03-04215265ND
2014-11-17328698ND
2015-02-17343423ND
2015-02-17343424ND
2015-03-09345991ND
2015-03-09345992ND
2016-03-07ND
2016-03-07ND
2016-03-07ND
2016-03-07ND
2017-10-24ND
2017-10-24ND