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Dichloromethane (methylene chloride)

Status: National drinking water standard exists

 

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.

2015:

FOUND
FOUND ABOVE HEALTH GUIDELINES

19

states detected

88

utilities detected

537,000

people served

0

states over health guideline

0

utilities over health guideline

0

people served over health guideline

Health concerns for dichloromethane (methylene chloride)

Cancer

Harm to reproduction and child development

Harm to the liver

State and national drinking water standards and health guidelines

Health Guideline 4 ppb

The 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.

ppb = parts per billion.

EPA Maximum Contaminant
Level (MCL) 5 ppb

The enforceable federal standard that defines the highest level of a contaminant allowed in drinking water.

ppb = parts per billion.

EPA Maximum Contaminant
Level Goal (MCLG)0 ppb

A non-enforceable federal health guideline. For cancer-causing chemicals, these health goals are typically set to zero.

ppb = parts per billion.

States reporting dichloromethane (methylene chloride) in drinking water

UTILITIES WITH CONTAMINATION
State UtilitiesPeople Served
California5166,267
New York3120,199
Oklahoma363,436
Wisconsin1256,351
Massachusetts133,600
North Carolina1220,897
New Jersey120,002
Arkansas615,050
Pennsylvania713,259
Texas98,580
Florida128,153
Georgia35,942
Louisiana41,977
Wyoming11,067
Montana2954
Alaska2660
New Mexico1400
Washington3392
Virginia140
MORE
LESS

Utilities with the highest amounts of dichloromethane (methylene chloride), 2015

ALL UTILITIES
LARGE UTILITIES
UtilityLocationTestsAverage levelPeople served
City of OlneyOlney, TX1 of 13.35 ppb3,285
Huttig WaterworksHuttig, AR1 of 23.24 ppb777
Chester, Town ofChester, MT1 of 33.13 ppb870
Clearview Mobile Home ParkMoore, OK3 of 53.00 ppb170
Bonita Water System*Bonita, LA2 of 42.75 ppb576
Indian Run Village Mobile Home ParkHoneybrook, PA1 of 12.60 ppb750
Leon Junction Water Supply CorporationGatesville, TX1 of 12.50 ppb288
Southern Manor M H PSlidell, LA2 of 22.30 ppb246
Grand Chute Tn San District 1Grand Chute, WI1 of 12.20 ppb21,583
Dubois Water System, Town OfDubois, WY1 of 21.70 ppb1,067
Miller ColonyChoteau, MT1 of 11.70 ppb84
Eros Community Water System*Eros, LA2 of 41.60 ppb729
Calmor Cove ClubBellingham, WA1 of 11.50 ppb17
Ocean Towers / Island VillageJensen Beach, FL1 of 11.04 ppb768
Colonial Woods Water SystemMt Airy, NC2 of 20.920 ppb203
Jefferson, Town ofJefferson, NC2 of 40.825 ppb1,763
Downingtown Water Authority*Downingtown, PA1 of 10.800 ppb9,900
Newberry EstateYork, PA2 of 20.750 ppb420
Harrison's Trailer ParkApopka, FL1 of 20.700 ppb70
Christman Lake Water SystemLenhartsville, PA1 of 10.700 ppb80
Jacumba Community SDJacumba, CA1 of 10.680 ppb500
Duggan FallsPortland, WA1 of 10.670 ppb100
Lake Manor Mobile Home ParkJensen Beach, FL1 of 10.650 ppb100
Westridge Water SystemMt Airy, NC1 of 20.650 ppb25
Braintree Water and Sewer DepartmentBraintree, MA1 of 10.640 ppb33,600
Concord Water SystemMarion, LA4 of 40.635 ppb426
MeansvilleMeansville, GA2 of 40.600 ppb263
Spencer Rd ParkConover, NC1 of 10.600 ppb142
Pleasant Prairie Mobile Home ParkKenosha, WI2 of 30.590 ppb35
Creighton FarmsAshburn, VA1 of 10.590 ppb40

* This water utility supplies finished drinking water to at least one other water utility. The purchasing utility is not required to test for or report Dichloromethane (methylene chloride), but it likely has the contaminant in its water supply.

MORE
LESS
UtilityLocationTestsAverage levelPeople served
Grand Chute Tn San District 1Grand Chute, WI1 of 12.20 ppb21,583
Braintree Water and Sewer DepartmentBraintree, MA1 of 10.640 ppb33,600
Town of Boone*Boone, NC1 of 10.540 ppb18,089
Marion Waterworks*Marion, AR1 of 80.473 ppb12,345
MooreMoore, OK5 of 180.311 ppb41,138
Elsinore Valley Municipal Water District*Lake Elsinore, CA3 of 70.236 ppb142,264
Shorewood WaterworksShorewood, WI1 of 10.220 ppb13,189
Del CityDel City, OK1 of 50.160 ppb22,128
Collingswood Water DeparCollingswood, NJ2 of 80.142 ppb20,002
Water Authority of Western NassauFloral Park, NY1 of 880.00739 ppb120,000

* This water utility supplies finished drinking water to at least one other water utility. The purchasing utility is not required to test for or report Dichloromethane (methylene chloride), but it likely has the contaminant in its water supply.