Dichloromethane (methylene chloride)
Cassadaga Village
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 | N/A | 0 | 0 | N/A |
2015 | ND | 6 | 0 | ND |
2016 | ND | 2 | 0 | ND |
2017 | ND | 4 | 0 | ND |
2018 | ND | 6 | 0 | ND |
2019 | ND | 5 | 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 |
---|---|---|
2015-05-05 | 15POCS WELL#1 CA | ND |
2015-05-05 | 15POC RAW#5 CASS | ND |
2015-05-05 | 15POCS EP#4 CASS | ND |
2015-07-30 | 3RDQT15 POC EP#1 | ND |
2015-10-22 | 4THQT15 WELL #4 | ND |
2015-10-22 | 4THQT15 WELL#1CA | ND |
2016-06-22 | POCS16 WELL #1 | ND |
2016-12-13 | 2016 POC WELL 5 | ND |
2017-02-08 | 2ND QUARTERLY 1S | ND |
2017-06-07 | 2NDQT17 POC WELL | ND |
2017-08-23 | POCS17 ENTRY PT | ND |
2017-08-23 | 3RDQT17 POCS EP# | ND |
2018-03-21 | POC 2018 | ND |
2018-07-16 | POCS 2018 CASS W | ND |
2018-07-16 | POCS 2018 CASS W | ND |
2018-07-16 | POCS 2018 CASS W | ND |
2018-10-03 | 2018 POC CASSADA | ND |
2018-10-09 | POCS 2018 CASS R | ND |
2019-03-20 | Q1 19 POCS WL1 C | ND |
2019-03-20 | POCS 19 WL5 CASS | ND |
2019-05-22 | Q2 19 POCS WL1 C | ND |
2019-08-28 | Q3 19 POCS WL1 C | ND |
2019-11-06 | Q4 19 POCS WL1 C | ND |