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National Drinking Water Database


Chloroform in Iowa


Chloroform 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

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

Ranked by highest average Chloroform level

RankSystem Population Served Positive test results of total reported tests Average Level
(Range)
1Joice Water Supply
Lake Mills, IA
2311 of 1150 ppb
(150 ppb)
2Arcml06 Llc - Silver Creek
Galesburg, IA
67311 of 1168.61 ppb
(31.6 to 149 ppb)
3Arcml06 Llc - Five Seasons
Galesburg, IA
67511 of 1166.45 ppb
(32 to 149 ppb)
4Bloomfield Muni Water Dept
Bloomfield, IA
2,60121 of 2165.12 ppb
(12.5 to 198 ppb)
5Southwest Reg Water District (Clarinda)
Clarinda, IA
2,09222 of 2264.61 ppb
(35.1 to 140 ppb)
6Danville Water Supply
Danville, IA
91421 of 2164.49 ppb
(18 to 148 ppb)
7Middletown Water Supply
Middletown, IA
53522 of 2262.64 ppb
(24.4 to 140 ppb)
8West Burlington Muni. Water Supply
West Burli, IA
3,16123 of 2360.59 ppb
(17.33 to 150 ppb)
9Plantation Village Owners Assn Inc
Burlington, IA
499 of 957.94 ppb
(18 to 126 ppb)
10Chariton Municipal Water Works
Chariton, IA
4,57323 of 2357.38 ppb
(22.61 to 163.25 ppb)

Health Based Limits for Chloroform

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.5.7 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.35 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
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
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
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.4000 ppb

Violation Summary for Chloroform in Iowa

There are no violations reported for this contaminant in Iowa