Know Your Environment. Protect Your Health.

Dichloromethane (methylene chloride)

City of Post Falls

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.

 

25

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018N/A00N/A
2019ND70ND
2020N/A00N/A
2021ND10ND
2022ND100ND
2023ND70ND

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
2019-11-12V210892ND
2019-11-13V210942ND
2019-11-18V211063ND
2019-11-18V211060ND
2019-11-19V211104ND
2019-12-09V211717ND
2019-12-16V211918ND
2021-11-30V202111052502ND
2022-02-09V202202020202ND
2022-03-09V202203020202ND
2022-03-09V202203020101ND
2022-03-14V202203025402ND
2022-03-14V202203025302ND
2022-04-27V202204053602ND
2022-06-06V2022060086ND
2022-06-07V2022060100ND
2022-07-13V202207033802ND
2022-11-01V202211003902ND
2023-01-25V202301040802ND
2023-05-15V202305028802ND
2023-07-25VMDG08170102ND
2023-07-25VMDG08170302ND
2023-07-25VMDG08170502ND
2023-07-25VMDG08170702ND
2023-12-13V202312023502ND