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EWG's Tap Water Database — 2019 UPDATE

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Dichloromethane (methylene chloride)

Parker Little River Water System

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.

 

17

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND30ND
2013ND40ND
2014ND40ND
2015ND40ND
2016ND10ND
2017ND10ND

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
2012-04-04AH56029ND
2012-07-17AH70104ND
2012-10-16AH81880ND
2013-03-12AH90579ND
2013-05-02AI00341ND
2013-08-06AI09276ND
2013-10-07AI19999ND
2014-01-09AI26220ND
2014-04-08AI37323ND
2014-07-09AI45160ND
2014-10-07AI56845ND
2015-01-23AI63333ND
2015-04-10AI74597ND
2015-07-10AI82489ND
2015-10-12AI92660ND
2016-02-10AJ06225ND
2017-05-11AJ55238ND