Menu

EWG's Tap Water Database — 2019 UPDATE

Donate

Dichloromethane (methylene chloride)

Naval Station, Newport

NOTE: Naval Station, Newport purchases water from City of Newport which is required to test for dichloromethane (methylene chloride). Sample information shown below was taken by City of Newport.

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.

 

51

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20122.89 ppb94ND - 17.0 ppb
2013ND80ND
2014ND80ND
2015ND80ND
2016ND20ND
2017ND100ND

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

NOTE: Naval Station, Newport purchases water from City of Newport which is required to test for dichloromethane (methylene chloride). Sample information shown below was taken by City of Newport.

Date Lab ID Result
2012-01-091200051-01_TO12ND
2012-01-091200054-01_TO12ND
2012-05-071201005-03_TO12ND
2012-05-071201005-02_TO12ND
2012-07-091201873-03_TO12ND
2012-07-091201873-01_TO12ND
2012-07-091201873-02_TO12ND
2012-07-091201873-04_TO12ND
2012-09-271209-20231-001_TND
2013-01-141300133-06_TO12ND
2013-01-141300133-07_TO12ND
2013-04-091300962-02_TO12ND
2013-04-091300962-01_TO12ND
2013-07-221302371-04_TO12ND
2013-07-221302371-02_TO12ND
2013-07-221302371-03_TO12ND
2013-07-221302371-05_TO12ND
2014-01-061401012-08_TO12ND
2014-01-061401012-03_TO12ND
2014-05-211402793-06_TO12ND
2014-05-211402793-05_TO12ND
2014-07-021403537-01_TO12ND
2014-07-021403537-05_TO12ND
2014-07-021403537-04_TO12ND
2014-07-021403537-03_TO12ND
2015-01-121501069-08_TO12ND
2015-01-121501069-03_TO12ND
2015-06-011502384-02_TO12ND
2015-06-011502384-01_TO12ND
2015-07-201503232-03_TO12ND
2015-07-201503232-05_TO12ND
2015-07-201503232-06_TO12ND
2015-07-201503232-04_TO12ND
2016-01-111600887-08_TO12ND
2016-01-111600887-02_TO12ND
2016-05-091602070-04_TO12ND
2016-05-091602070-05_TO12ND
2016-07-251603626-01_TO12ND
2016-07-251603626-03_TO12ND
2016-07-251603626-04_TO12ND
2016-07-251603626-02_TO12ND
2017-01-241701020-02_TO12ND
2017-01-251701027-06_TO12ND
2017-05-151702185-02_TO12ND
2017-05-151702185-01_TO12ND
2017-07-101703108-04_TO12ND
2017-07-101703108-01_TO12ND
2017-07-101703108-02_TO12ND
2017-07-101703108-03_TO12ND
2017-10-171710399-02_TO12ND
2017-10-171710399-01_TO12ND