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National Drinking Water Database


cis-1,2-Dichloroethylene in Washington


cis-1,2-Dichloroethylene is a pollutant discharged by various industrial chemical factories from the manufacture of plastic wrap, adhesives and synthetic fiber. [read more]

The Most Polluted Communities in Washington

3 water utilities reported detecting cis-1,2-Dichloroethylene in tap water since 2004, according to EWG's analysis of water quality data supplied by state water agencies

Ranked by highest average cis-1,2-Dichloroethylene level

RankSystem Population Served Positive test results of total reported tests Average Level
(Range)
1MC Chord Air Force Base
Mcchord Afb, WA
3,2612 of 140.09 ppb
(0 to 0.8 ppb)
2City of Auburn Water Division
Auburn, WA
45,0001 of 90.05 ppb
(0 to 0.45 ppb)
3City of Tacoma Water Division
Tacoma, WA
305,0001 of 34< 0.01 ppb
(0 to 0.17 ppb)

Health Based Limits for cis-1,2-Dichloroethylene

StandardDescriptionLevel
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.70 ppb
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.70 ppb
Lifetime health-based limit, non-cancer riskConcentration of a chemical in drinking water that is not expected to cause any adverse, noncarcinogenic health effects for a lifetime of exposure. The Lifetime health-based limit (or Health Advisory, HA) is based on exposure for a a 70-kg adult consuming 2 liters of water per day. Source: U.S. Environmental Protection Agency.70 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.350 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.1000 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.4000 ppb

Violation Summary for cis-1,2-Dichloroethylene in Washington

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

Violation TypeNumber of Violations
Failure to monitor regularly987