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National Drinking Water Database


Dibromochloromethane in Iowa


Dibromochloromethane is a disinfection byproduct from the trihalomethane (THM) family, and is formed when chlorine, chloramines or other disinfectants react with organic and inorganic matter in water. [read more]

The Most Polluted Communities in Iowa

640 water utilities reported detecting Dibromochloromethane in tap water since 2004, according to EWG's analysis of water quality data supplied by state water agencies

Ranked by highest average Dibromochloromethane level

RankSystem Population Served Positive test results of total reported tests Average Level
(Range)
1Williams Water Supply
Williams, IA
42720 of 2023.45 ppb
(15 to 32 ppb)
2Manning Water Supply
Manning, IA
1,4906 of 616.7 ppb
(10.2 to 24 ppb)
3Harlan Municipal Utilities
Harlan, IA
5,3136 of 616.25 ppb
(12 to 22 ppb)
4Arthur Municipal Water Supply
Arthur, IA
2475 of 515.2 ppb
(12 to 20 ppb)
5Glenwood Municipal Utilities
Glenwood, IA
5,8653 of 314.87 ppb
(9.6 to 22.5 ppb)
6Kalona Water Dept
Kalona, IA
2,2936 of 614.25 ppb
(7.5 to 21 ppb)
7Bel Air Betterment Corporation
Storm Lake, IA
983 of 313.97 ppb
(0.9 to 25 ppb)
8Aspinwall Water Supply
Manning, IA
585 of 513.6 ppb
(12 to 14 ppb)
9Coralville Muni Water System
Coralville, IA
17,26911 of 1113.48 ppb
(8.55 to 18 ppb)
10Rinard Water Supply
Storm Lake, IA
794 of 413.45 ppb
(8.8 to 17 ppb)

Health Based Limits for Dibromochloromethane

StandardDescriptionLevel
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.0.4 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.0.8 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.60 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.60 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.80 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.80 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.600 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.600 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.700 ppb

Violation Summary for Dibromochloromethane in Iowa

There are no violations reported for this contaminant in Iowa