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EWG's Tap Water Database — 2021 UPDATE

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Dichloromethane (methylene chloride)

Collegeville Trappe Joint Public Works Department

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.

MORE ABOUT THIS CONTAMINANT

 

168

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND280ND
2015ND280ND
2016ND280ND
2017ND280ND
2018ND280ND
2019ND280ND

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
2014-01-2020140238ND
2014-01-2020140239ND
2014-01-2020140240ND
2014-01-2020140241ND
2014-01-2020140242ND
2014-03-1720140955ND
2014-03-1720140956ND
2014-04-2120141346ND
2014-04-2120141347ND
2014-04-2120141348ND
2014-04-2120141349ND
2014-04-2120141350ND
2014-04-2120141351ND
2014-04-2120141352ND
2014-07-0714070813-001ND
2014-07-0714070813-002ND
2014-07-0714070813-003ND
2014-07-0714070813-004ND
2014-08-1320142789ND
2014-08-1320142790ND
2014-08-1320142791ND
2014-11-1714111750-01ND
2014-11-1714111750-02ND
2014-11-1714111750-03ND
2014-11-1714111750-04ND
2014-11-1714111750-05ND
2014-11-1714111750-06ND
2014-12-0114120200-01ND
2015-01-1912285451ND
2015-01-1912285472ND
2015-01-1912285493ND
2015-01-1912285514ND
2015-01-1912285535ND
2015-01-1912285556ND
2015-01-1912285577ND
2015-04-2012631589ND
2015-04-2012631610ND
2015-04-2012631631ND
2015-04-2012631652ND
2015-04-2012631673ND
2015-04-2012631694ND
2015-04-2012631715ND
2015-07-0613011202ND
2015-07-0613011228ND
2015-07-0613011254ND
2015-07-0613011280ND
2015-07-0613011306ND
2015-07-0613011332ND
2015-07-2013011546ND
2015-10-1913387774ND
2015-10-1913387795ND
2015-10-1913387816ND
2015-10-1913387837ND
2015-10-1913387858ND
2015-10-1913387879ND
2015-10-1913387900ND
2016-01-1813751345ND
2016-01-1813751366ND
2016-01-1813751387ND
2016-01-1813751408ND
2016-01-1813751429ND
2016-01-1813751450ND
2016-02-1613869074ND
2016-04-1814101339ND
2016-04-1814101360ND
2016-04-1814101381ND
2016-04-1814101402ND
2016-04-1814101423ND
2016-04-1814101444ND
2016-04-1814101465ND
2016-07-1814568361ND
2016-07-1814568382ND
2016-07-1814568403ND
2016-07-1814568424ND
2016-07-1814568445ND
2016-07-1814568466ND
2016-07-1814568487ND
2016-10-1715074109ND
2016-10-1715074130ND
2016-10-1715074151ND
2016-10-1715074172ND
2016-10-1715074193ND
2016-10-1715074214ND
2016-10-1715074235ND
2017-02-2715653924ND
2017-02-2715653945ND
2017-02-2715653966ND
2017-02-2715653987ND
2017-02-2715654008ND
2017-03-0715793991ND
2017-03-0715794012ND
2017-04-1715935324ND
2017-04-1715935345ND
2017-04-1715935366ND
2017-04-1715935387ND
2017-04-1715935408ND
2017-04-1715935429ND
2017-04-1715935450ND
2017-07-1716411664ND
2017-07-1716411685ND
2017-07-1716411706ND
2017-07-1716411727ND
2017-07-1716411748ND
2017-07-1716411769ND
2017-07-1716411790ND
2017-10-1616878515ND
2017-10-1616878536ND
2017-10-1616878557ND
2017-10-1616878578ND
2017-10-1616878599ND
2017-10-1616878620ND
2017-10-1616878641ND
2018-01-2220180311ND
2018-01-2220180312ND
2018-01-2220180313ND
2018-01-2220180314ND
2018-01-2220180315ND
2018-01-2220180316ND
2018-01-2220180317ND
2018-04-1820181575ND
2018-04-1820181576ND
2018-04-1820181577ND
2018-04-1820181578ND
2018-04-1820181579ND
2018-04-1820181580ND
2018-04-1820181581ND
2018-07-1620182718ND
2018-07-1620182719ND
2018-07-1620182720ND
2018-07-1620182721ND
2018-07-1620182722ND
2018-07-1620182723ND
2018-07-1620182724ND
2018-10-1520183946ND
2018-10-1520183947ND
2018-10-1520183948ND
2018-10-1520183949ND
2018-10-1520183950ND
2018-10-1520183951ND
2018-10-1520183952ND
2019-01-2320190306ND
2019-01-2320190307ND
2019-01-2320190308ND
2019-01-2320190309ND
2019-01-2320190310ND
2019-01-2320190311ND
2019-01-2320190312ND
2019-04-1520191439ND
2019-04-1520191440ND
2019-04-1520191441ND
2019-04-1520191442ND
2019-04-1520191443ND
2019-04-1520191444ND
2019-04-1520191445ND
2019-07-1520192706ND
2019-07-1520192707ND
2019-07-1520192708ND
2019-07-1520192709ND
2019-07-1520192710ND
2019-07-1520192711ND
2019-07-1520192712ND
2019-10-2120194150ND
2019-10-2120194151ND
2019-10-2120194152ND
2019-10-2120194153ND
2019-10-2120194154ND
2019-10-2120194155ND
2019-10-2120194156ND