The Power of Information

National Drinking Water Database


Dichloromethane (methylene chloride) in Alaska


Dichloromethane is a widely-used paint remover, solvent and metal degreasing agent; it is discharged into the environment from the manufacture of chemicals, textiles, electronics, metals and plastics, pharmaceuticals and pesticides. [read more]

The Most Polluted Communities in Alaska

19 water utilities reported detecting Dichloromethane (methylene chloride) in tap water since 2004, according to EWG's analysis of water quality data supplied by state water agencies

Ranked by highest average Dichloromethane (methylene chloride) level

RankSystem Population Served Positive test results of total reported tests Average Level
(Range)
1Old Harbor
Old Harbor, AK
3201 of 40.59 ppb
(0 to 2.37 ppb)
2Tununak Water System
Tununak, AK
3541 of 10.58 ppb
(0.58 ppb)
3Moa Knik View Estates
Anchorage, AK
2381 of 40.52 ppb
(0 to 2.09 ppb)
4Seldovia Water System
Seldovia, AK
4611 of 50.4 ppb
(0 to 2 ppb)
5Girdwood Water System
Anchorage, AK
2,3421 of 40.34 ppb
(0 to 1.36 ppb)
6Meadow Brook Subdivision
Big Lake, AK
5361 of 20.25 ppb
(0 to 0.5 ppb)
7Churchill Park
Juneau, AK
2501 of 40.23 ppb
(0 to 0.91 ppb)
8Kokhanok Water & WW System
Kokhanok, AK
1551 of 30.2 ppb
(0 to 0.6 ppb)
9Hydaburg
Hydaburg, AK
4151 of 30.2 ppb
(0 to 0.59 ppb)
10Moa Municipality of Anchorage
Anchorage, AK
221,3512 of 120.19 ppb
(0 to 1.44 ppb)

Health Based Limits for Dichloromethane (methylene chloride)

StandardDescriptionLevel
Maximum Contaminant Limit Goal (MCLG)A non-enforceable health goal that is set at a level at which no known or anticipated adverse effect on the health of persons occurs and which allows an adequate margin of safety. Source: U.S. Environmental Protection Agency.0 ppb
California Public Health GoalsDefined by the State of California Office of Environmental Health Hazard Assessment (OEHHA) as the level of contaminant that is allowed in drinking water. For acutely toxic substances, levels are set at which scientific evidence indicates that no known or anticipated adverse effects on health will occur, plus an adequate margin-of safety. PHGs for carcinogens or other substances which can cause chronic disease shall be based solely on health effects without regard to cost impacts and shall be set at levels which OEHHA has determined do not pose any significant risk to health.4 ppb
EPA Human Health Water Quality CriteriaWater quality criteria set by the US EPA provide guidance for states and tribes authorized to establish water quality standards under the Clean Water Act (CWA) to protect human health. These are non-enforceable standards based upon exposure by both drinking water and the contribution of water contamination to other consumed foods. Source: U.S. Environmental Protection Agency.4.6 ppb
Maximum Contaminant Limit (MCL)The enforceable standard which defines the highest level of a contaminant that is allowed in drinking water. MCLs are set as close to health-based limits (Maximum Contaminant Level Goals, or MCLGs) as feasible using the best available analytical and treatment technologies and taking cost into consideration. Source: U.S. Environmental Protection Agency.5 ppb
One in one million (10-6) Cancer RiskThe concentration of a chemical in drinking water corresponding to an excess estimated lifetime cancer risk of 1 in 1,000,000. Source: U.S. Environmental Protection Agency.5 ppb
One in ten thousand (10-4) Cancer RiskThe concentration of a chemical in drinking water corresponding to an excess estimated lifetime cancer risk of 1 in 10,000. Source: U.S. Environmental Protection Agency.500 ppb
Children's health-based limit for 10-day exposureConcentration of a chemical in drinking water that is not expected to cause any adverse, noncarcinogenic effects for up to ten days of exposure. The Ten-Day health-based limit (or Health Advisory, HA) is typically set to protect a 10-kg child consuming 1 liter of water per day. Source: U.S. Environmental Protection Agency.2000 ppb
Drinking Water Equivalent LevelA lifetime exposure concentration protective of adverse, noncarcinogenic health effects, that assumes all of the exposure to a contaminant is from drinking water. Source: U.S. Environmental Protection Agency.2000 ppb
Children's health-based limit for 1-day exposureConcentration of a chemical in drinking water that is not expected to cause any adverse, noncarcinogenic health effects for up to one day of exposure. The One-Day health-based limit (or Health Advisory, HA) is typically set to protect a 10-kg child consuming 1 liter of water per day. Source: U.S. Environmental Protection Agency.10000 ppb

Violation Summary for Dichloromethane (methylene chloride) in Alaska

Data from the U.S. Environmental Protection Agency includes the following violations of federal standards in Alaska since 2004

Violation TypeNumber of Violations
Failure to monitor regularly232