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EWG's Tap Water Database — 2021 UPDATE

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Dichloromethane (methylene chloride)

City of El Mirage

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.

 

54

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND60ND
2015ND50ND
2016ND110ND
2017ND80ND
2018ND120ND

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
2014-02-114020905-09VND
2014-02-114020905-08VND
2014-02-114020905-07VND
2014-02-114020905-06VND
2014-02-114020905-05VND
2014-02-114020905-01VND
2015-01-265012031-01VND
2015-01-265012030-01VND
2015-01-265012029-01VND
2015-01-265012026-01VND
2015-01-265012025-01VND
2016-03-076030608-01VND
2016-05-236051917-01ND
2016-09-136091229-01ND
2016-09-146091229-03ND
2016-09-166091435-03ND
2016-09-166091435-02ND
2016-09-166091435-01ND
2016-09-216091854-02VND
2016-09-216091854-01VND
2016-09-276092333-01VND
2016-12-296122336-01ND
2017-03-097030873-01VND
2017-03-097030871-01VND
2017-03-097030869-01VND
2017-03-137031073-01VND
2017-03-167031500-01VND
2017-03-167031498-01VND
2017-03-167031494-01VND
2017-06-307062823-01VOCND
2018-02-2118B2021-01ND
2018-02-2118B2011-01VOCND
2018-02-2818B2665-01ND
2018-05-1518E1595-05 VOCND
2018-05-1518E1595-04 VOCND
2018-05-1518E1595-03 VOCND
2018-05-1518E1595-02 VOCND
2018-05-1518E1595-01 VOCND
2018-05-2418E2565-01 VOCND
2018-06-2718F2770-01 VOCND
2018-09-2818I2749-01ND
2018-10-3118J3309-02ND
2019-01-3119A3296-01ND
2019-04-1819D2239-01ND
2019-04-3019D3255-01ND
2019-04-3019D3251-01ND
2019-05-0119E0140-01ND
2019-05-0119E0136-01ND
2019-05-0119E0134-01ND
2019-06-1019F1007-01ND
2019-06-2019F2265-01ND
2019-06-2419F2482-01ND
2019-07-0219G0397-01ND
2019-10-0919J1316-02ND