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EWG's Tap Water Database — 2019 UPDATE

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Dichloromethane (methylene chloride)

Lee County WSC

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.

 

33

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND20ND
2013ND20ND
2014ND40ND
2015ND80ND
2016ND80ND
2017ND90ND

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
2012-01-11AB77453ND
2012-01-11AB77451ND
2013-10-14Q1308854031ND
2013-10-14Q1308854019ND
2014-02-25AC44512ND
2014-02-25AC44508ND
2014-05-13AC53987ND
2014-05-13AC53985ND
2015-03-04AC82924ND
2015-03-04AC82930ND
2015-03-04AC82926ND
2015-03-04AC82932ND
2015-03-04AC82934ND
2015-03-04AC82892ND
2015-06-17AC96390ND
2015-06-17AC96380ND
2016-01-27AD20413ND
2016-01-27AD20415ND
2016-01-27AD20423ND
2016-01-27AD20427ND
2016-04-12AD32845ND
2016-04-12AD32843ND
2016-09-08AD48502ND
2016-10-31AD55564ND
2017-01-30AD67539ND
2017-01-30AD67529ND
2017-01-30AD67533ND
2017-05-04AD82775ND
2017-05-04AD82781ND
2017-05-04AD82777ND
2017-05-30AD85893ND
2017-07-24AD90394ND
2017-10-04AD99282ND