Know Your Environment. Protect Your Health.

Dichloromethane (methylene chloride)

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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.

 

24

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND40ND
2019ND40ND
2020ND40ND
2021ND40ND
2022ND40ND
2023ND40ND

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

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
2018-02-27AE08317ND
2018-06-14AE13736ND
2018-07-25AE15755ND
2018-10-10AE19481ND
2019-03-07AE26872ND
2019-06-13AE31970ND
2019-09-04AE36637ND
2019-11-13AE40146ND
2020-03-12AE46093ND
2020-05-27AE49083ND
2020-07-22AE51793ND
2020-10-21AE56198ND
2021-03-11AE62654ND
2021-05-26AE66572ND
2021-09-21AE72335ND
2021-10-20AE73728ND
2022-02-23AE79541ND
2022-04-20AE82474ND
2022-09-14AE89723ND
2022-10-18AE91740ND
2023-01-24AE95947ND
2023-04-18AF00389ND
2023-07-18AF05697ND
2023-10-17AF10284ND