Dichloromethane (methylene chloride)
Middletown Water Department
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.
Testing results - average by year
Year | Average result | Samples taken | Detections | Range of results |
---|---|---|---|---|
2014 | ND | 2 | 0 | ND |
2015 | ND | 2 | 0 | ND |
2016 | ND | 2 | 0 | ND |
2017 | ND | 2 | 0 | ND |
2018 | ND | 2 | 0 | ND |
2019 | ND | 2 | 0 | ND |
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 |
---|---|---|
2014-06-09 | VOC1 200397422 | ND |
2014-06-09 | VOC1 200397423 | ND |
2015-05-28 | VOC1 200417513 | ND |
2015-06-01 | VOC1 200417623 | ND |
2016-06-22 | VOC1 200442999 | ND |
2016-06-29 | VOC1 200443424 | ND |
2017-06-29 | VOC1 200470757 | ND |
2017-09-29 | VOC1 200478287 | ND |
2018-03-28 | VOC1 200490770 | ND |
2018-04-16 | VOC1 200492154 | ND |
2019-05-13 | VOC1 200531893 | ND |
2019-05-21 | VOC1 200533083 | ND |