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EWG's Tap Water Database — 2019 UPDATE

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Dichloromethane (methylene chloride)

Penn State Univ.

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.

 

167

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND340ND
2013ND280ND
2014ND140ND
2015ND350ND
2016ND270ND
2017ND290ND

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
2012-01-112A11054ND
2012-01-112A11055ND
2012-01-112A11054ND
2012-02-162B16056ND
2012-02-162B16062ND
2012-02-162B16056ND
2012-03-152C15113ND
2012-03-152C15114ND
2012-03-152C15113ND
2012-04-102D10034ND
2012-04-102D10032ND
2012-04-102D10034ND
2012-05-162E16047ND
2012-05-162E16052ND
2012-06-132F13082ND
2012-06-132F13085ND
2012-07-182G18164ND
2012-07-182G18165ND
2012-07-182G18164ND
2012-08-142H14056ND
2012-08-142H14056ND
2012-08-142H14056ND
2012-09-132I14008ND
2012-09-132I14008ND
2012-09-132I14008ND
2012-10-102J11011ND
2012-10-102J11013ND
2012-10-102J11011ND
2012-11-142K14103ND
2012-11-142K14103ND
2012-11-142K14103ND
2012-12-122L12132ND
2012-12-122L12141ND
2012-12-122L12132ND
2013-01-163A16080ND
2013-01-163A16077ND
2013-02-133B13070ND
2013-02-133B13069ND
2013-03-143C14062ND
2013-03-143C14067ND
2013-04-163D16078ND
2013-04-163D16079ND
2013-05-143E14110ND
2013-05-143E14111ND
2013-06-193F19020ND
2013-06-193F19038ND
2013-06-283F28065ND
2013-07-163G16031ND
2013-07-163G16034ND
2013-08-143H14065ND
2013-08-143H14088ND
2013-09-183I18061ND
2013-09-183I18062ND
2013-09-183I18061ND
2013-10-163J16032ND
2013-10-163J16040ND
2013-10-163J16032ND
2013-11-193K19048-06ND
2013-11-193K19040-06ND
2013-12-123L12046-07ND
2013-12-123L12104-06ND
2013-12-123L12046-06ND
2014-01-234A23025-07ND
2014-01-234A23033-06ND
2014-01-234A23025-06ND
2014-02-204B20042-07ND
2014-02-204B20041-07ND
2014-02-204B20042-06ND
2014-03-114C11016-07ND
2014-03-114C11027-07ND
2014-03-114C11016-06ND
2014-04-094D09031-01ND
2014-04-094D09036-01ND
2014-04-094D09037-01ND
2014-06-114F11107-05ND
2014-06-114F11107-04ND
2015-01-2113561223ND
2015-01-2113561263ND
2015-01-2113561224ND
2015-02-1713561307ND
2015-02-1713561284ND
2015-02-1713561308ND
2015-03-1713561349ND
2015-03-1713561350ND
2015-03-1813561389ND
2015-04-2813561413ND
2015-04-2813561412ND
2015-05-2013561475ND
2015-05-2013561452ND
2015-05-2013561476ND
2015-06-1713561538ND
2015-06-1713561515ND
2015-06-1713561539ND
2015-07-1413561580ND
2015-07-1413561620ND
2015-07-1413561581ND
2015-08-1213561665ND
2015-08-1213561641ND
2015-08-1213561664ND
2015-09-1613561727ND
2015-09-1613561704ND
2015-09-1613561728ND
2015-10-1513561769ND
2015-10-1513561809ND
2015-10-1513561770ND
2015-11-1113561176ND
2015-11-1113561152ND
2015-11-1113561200ND
2015-12-1013681462ND
2015-12-1013681505ND
2015-12-1013681463ND
2016-01-2613801544ND
2016-01-2613801496ND
2016-01-2613801520ND
2016-02-2313917087ND
2016-02-2313917058ND
2016-02-2313917088ND
2016-03-1614032217ND
2016-03-1614032194ND
2016-03-1614032171ND
2016-04-2014163573ND
2016-04-2014163544ND
2016-04-2014163574ND
2016-05-1814312881ND
2016-05-1814312924ND
2016-05-1814312882ND
2016-06-2114471206ND
2016-06-2114471250ND
2016-06-2114471207ND
2016-07-1914636448ND
2016-07-1914636417ND
2016-07-1914636449ND
2016-08-2314804524ND
2016-08-2314804474ND
2016-08-2314804499ND
2016-09-2814975864ND
2016-09-2814975908ND
2016-09-2814975865ND
2017-01-1715573220ND
2017-01-1715573221ND
2017-01-1815573189ND
2017-02-2315709633ND
2017-02-2315709634ND
2017-03-1315850527ND
2017-03-2315850694ND
2017-03-2815850822ND
2017-04-1816001563ND
2017-04-1816001564ND
2017-06-2816321138ND
2017-07-1216473281ND
2017-07-1216473319ND
2017-07-1216473320ND
2017-07-1216473321ND
2017-07-1216473322ND
2017-07-1216473323ND
2017-07-1216473324ND
2017-08-0316629356ND
2017-09-2016787327ND
2017-10-3116937419ND
2017-11-2617077236ND
2017-11-2617077237ND
2017-11-2617077238ND
2017-11-2617077239ND
2017-11-2617077240ND
2017-11-2617077241ND
2017-11-3017077358ND
2017-12-1917217466ND