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EWG's Tap Water Database — 2021 UPDATE

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Dichloromethane (methylene chloride)

Ward II Water District

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.

 

46

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
2014N/A00N/A
2015ND200ND
2016ND40ND
2017ND60ND
2018ND140ND
2019ND20ND

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
2015-07-2035198654001ND
2015-07-2035198654001ND
2015-09-2135208876003ND
2015-09-2135208876002ND
2015-09-2135208876001ND
2015-09-2135208876004ND
2015-09-2135208876005ND
2015-09-2135208876005ND
2015-09-2135208876004ND
2015-09-2135208876003ND
2015-09-2135208876002ND
2015-09-2135208876001ND
2015-09-2935209950001ND
2015-09-2935209950001ND
2015-09-2935209950002ND
2015-09-2935209950003ND
2015-09-2935209950004ND
2015-09-2935209950004ND
2015-09-2935209950003ND
2015-09-2935209950002ND
2016-03-0135232777001ND
2016-03-0135232777002ND
2016-03-0135232777002ND
2016-03-0135232777001ND
2017-06-1935320024003ND
2017-06-1935320024002ND
2017-06-1935320024001ND
2017-06-1935320024003ND
2017-06-1935320024002ND
2017-06-1935320024001ND
2018-06-2535400823001ND
2018-06-2535400823002ND
2018-06-2535400823005ND
2018-06-2535400823004ND
2018-06-2535400823003ND
2018-06-2535400823001ND
2018-06-2535400823002ND
2018-06-2535400823003ND
2018-06-2535400823004ND
2018-06-2535400823005ND
2018-08-0735409917001ND
2018-08-0735409917001ND
2018-09-1035417396001ND
2018-09-1035417396001ND
2019-07-2435485209001ND
2019-07-2435485209001ND