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EWG's Tap Water Database — 2019 UPDATE

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Dichloromethane (methylene chloride)

North Penn Water Authority

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.

 

306

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND370ND
2013ND520ND
2014ND510ND
2015ND470ND
2016ND600ND
2017ND590ND

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
2012-01-1812011268ND
2012-01-1812011268ND
2012-01-1812011268ND
2012-05-0720121667ND
2012-05-0720121668ND
2012-05-0720121669ND
2012-05-0720121670ND
2012-05-0720121671ND
2012-05-0720121672ND
2012-06-0620122029ND
2012-06-0620122027ND
2012-06-0620122028ND
2012-06-0620122026ND
2012-07-1120122428ND
2012-07-1120122429ND
2012-08-0120122665ND
2012-08-0120122660ND
2012-08-0120122661ND
2012-08-0120122662ND
2012-08-0120122664ND
2012-08-0120122663ND
2012-09-1920123305ND
2012-09-1920123302ND
2012-09-1920123303ND
2012-09-1920123306ND
2012-09-1920123304ND
2012-10-1720123691ND
2012-10-1720123692ND
2012-10-1720123693ND
2012-11-2620124016ND
2012-11-2620124017ND
2012-11-2620124018ND
2012-11-2620124019ND
2012-12-1220124345ND
2012-12-1220124342ND
2012-12-1220124343ND
2012-12-1220124344ND
2013-01-1620130197ND
2013-01-1620130198ND
2013-01-1620130199ND
2013-02-0620130465ND
2013-02-0620130466ND
2013-02-0620130467ND
2013-02-0620130468ND
2013-04-1720131328ND
2013-04-1720131323ND
2013-04-1720131324ND
2013-04-1720131326ND
2013-04-1720131325ND
2013-04-1720131327ND
2013-05-1520131666ND
2013-05-1520131667ND
2013-05-1520131668ND
2013-05-1520131669ND
2013-05-1520131670ND
2013-05-1520131671ND
2013-06-0520131984ND
2013-06-0520131979ND
2013-06-0520131980ND
2013-06-0520131982ND
2013-06-0520131983ND
2013-06-0520131981ND
2013-07-1020132442ND
2013-07-1020132443ND
2013-07-1020132444ND
2013-08-1920133017ND
2013-08-1920133018ND
2013-08-1920133014ND
2013-08-1920133015ND
2013-08-1920133016ND
2013-08-1920133019ND
2013-09-1820133416ND
2013-09-1820133417ND
2013-09-1820133418ND
2013-09-1820133419ND
2013-09-1820133420ND
2013-10-1620133724ND
2013-10-1620133725ND
2013-10-1620133727ND
2013-10-1620133726ND
2013-11-1120134022ND
2013-11-1120134023ND
2013-11-1120134024ND
2013-11-1120134025ND
2013-12-1120134387ND
2013-12-1120134388ND
2013-12-1120134390ND
2013-12-1120134391ND
2013-12-1120134389ND
2014-01-2020140222ND
2014-01-2020140223ND
2014-01-2020140224ND
2014-01-2020140225ND
2014-02-1220140545ND
2014-02-1220140546ND
2014-02-1220140542ND
2014-02-1220140543ND
2014-02-1220140544ND
2014-02-1220140547ND
2014-03-0520140816ND
2014-03-0520140817ND
2014-03-0520140818ND
2014-03-0520140819ND
2014-03-0520140820ND
2014-04-0220141122ND
2014-04-0220141123ND
2014-04-0220141125ND
2014-04-0220141124ND
2014-05-1920141698ND
2014-05-1920141699ND
2014-05-1920141700ND
2014-05-1920141701ND
2014-06-0420141932ND
2014-06-0420141933ND
2014-06-0420141935ND
2014-06-0420141936ND
2014-06-0420141934ND
2014-07-1620142445ND
2014-07-1620142446ND
2014-07-1620142447ND
2014-08-1820142827ND
2014-08-1820142828ND
2014-08-1820142824ND
2014-08-1820142825ND
2014-08-1820142826ND
2014-08-1820142829ND
2014-09-0820143077ND
2014-09-0820143078ND
2014-09-0820143079ND
2014-09-0820143080ND
2014-09-0820143081ND
2014-11-1014110622-001ND
2014-11-1014110622-002ND
2014-11-1014110622-003ND
2014-11-1014110622-004ND
2014-12-0820144185ND
2014-12-0820144186ND
2014-12-0820144188ND
2014-12-0820144189ND
2014-12-0820144187ND
2015-01-1912287150ND
2015-01-1912287171ND
2015-01-1912287192ND
2015-01-1912287213ND
2015-02-0912402097ND
2015-02-0912402118ND
2015-02-0912402034ND
2015-02-0912402055ND
2015-02-0912402076ND
2015-02-0912402139ND
2015-04-2012633455ND
2015-04-2012633476ND
2015-04-2012633518ND
2015-04-2012633497ND
2015-06-1512882969ND
2015-07-1313013064ND
2015-07-1313013090ND
2015-07-1313013116ND
2015-07-1313013142ND
2015-07-1313013168ND
2015-08-1713135665ND
2015-08-1713135686ND
2015-08-1713135728ND
2015-08-1713135749ND
2015-08-1713135707ND
2015-08-1713135770ND
2015-09-1413264707ND
2015-09-1413264733ND
2015-09-1413264759ND
2015-10-0513389211ND
2015-10-0513389232ND
2015-10-0513389274ND
2015-10-0513389253ND
2015-11-1113514202ND
2015-11-1113514139ND
2015-11-1113514160ND
2015-11-1113514181ND
2015-11-1113514223ND
2015-12-0213633343ND
2015-12-0213633369ND
2015-12-0213633395ND
2015-12-0213633421ND
2015-12-0213633447ND
2015-12-0213633473ND
2015-12-0913633499ND
2015-12-0913633299ND
2015-12-1413633320ND
2016-01-1813753162ND
2016-01-1813753183ND
2016-01-1813753204ND
2016-01-1813753225ND
2016-02-1713870699ND
2016-02-1713870720ND
2016-02-1713870636ND
2016-02-1713870657ND
2016-02-1713870678ND
2016-02-1713870741ND
2016-03-0213986050ND
2016-03-0213986076ND
2016-03-0213986102ND
2016-03-0213986128ND
2016-03-0213986154ND
2016-04-1814102967ND
2016-04-1814102988ND
2016-04-1814103030ND
2016-04-1814103009ND
2016-05-1614250802ND
2016-05-1614250823ND
2016-05-1614250844ND
2016-05-1614250865ND
2016-06-0614405887ND
2016-06-0614405914ND
2016-06-0614405968ND
2016-06-0614405995ND
2016-06-0614405941ND
2016-07-1814569948ND
2016-07-1814569969ND
2016-07-1814569990ND
2016-07-1814570011ND
2016-08-0114735668ND
2016-08-0114735689ND
2016-08-0114735605ND
2016-08-0114735626ND
2016-08-0114735647ND
2016-08-0114735710ND
2016-08-2314907949ND
2016-09-0714908076ND
2016-09-0714908103ND
2016-09-0714908130ND
2016-09-0714908157ND
2016-09-0714908184ND
2016-10-2415075725ND
2016-10-2415075746ND
2016-10-2415075788ND
2016-10-2415075767ND
2016-11-1415226162ND
2016-11-1415226078ND
2016-11-1415226099ND
2016-11-1415226204ND
2016-11-1415226120ND
2016-11-1415226183ND
2016-11-1415226141ND
2016-12-0515372187ND
2016-12-0515372208ND
2016-12-0515372229ND
2016-12-0515372250ND
2016-12-0515372271ND
2017-01-2315517776ND
2017-01-2315517797ND
2017-01-2315517818ND
2017-01-2315517839ND
2017-02-2215655935ND
2017-02-2315656019ND
2017-02-2315656040ND
2017-02-2315655956ND
2017-02-2315655977ND
2017-02-2315655998ND
2017-02-2315656061ND
2017-03-2215796081ND
2017-03-2215796108ND
2017-03-2215796135ND
2017-03-2215796162ND
2017-03-2215796189ND
2017-04-1715937473ND
2017-04-1715937494ND
2017-04-1715937536ND
2017-04-1715937515ND
2017-05-1516094568ND
2017-05-1516094589ND
2017-05-1516094652ND
2017-05-1516094610ND
2017-05-1516094631ND
2017-07-0516413109ND
2017-07-0516413130ND
2017-07-0516413151ND
2017-07-1716413706ND
2017-07-1716413727ND
2017-07-1716413748ND
2017-07-1716413769ND
2017-08-0216566166ND
2017-08-0216566187ND
2017-08-0216566061ND
2017-08-0216566082ND
2017-08-0216566145ND
2017-08-0216566103ND
2017-08-0216566124ND
2017-09-1116726746ND
2017-09-1116726773ND
2017-09-1116726800ND
2017-09-1116726827ND
2017-09-1116726854ND
2017-10-1616880077ND
2017-10-1616880098ND
2017-10-1616880140ND
2017-10-1616880119ND
2017-11-0117023333ND
2017-11-0117023354ND
2017-11-0117023417ND
2017-11-0117023375ND
2017-11-0117023396ND
2017-12-0417161955ND
2017-12-0417161976ND
2017-12-0417162018ND
2017-12-0417162039ND
2017-12-0417161997ND
2017-12-0417162060ND