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National Drinking Water Database


Chloroform in Minnesota


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 Minnesota

694 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)
1Kennedy
Kennedy, MN
2324 of 461 ppb
(56 to 67 ppb)
2Spicer
Spicer, MN
1,1506 of 658.83 ppb
(4 to 99 ppb)
3Saint Augusta
Saint Augusta, MN
1,40017 of 1755.19 ppb
(23.67 to 110 ppb)
4Fayal Township
Eveleth, MN
3774 of 454.5 ppb
(12 to 120 ppb)
5Mora
Mora, MN
3,44417 of 1754.34 ppb
(0.3 to 100 ppb)
6Stephen
Stephen, MN
6828 of 853.58 ppb
(33 to 77 ppb)
7Askov
Askov, MN
37613 of 1353.23 ppb
(35 to 95 ppb)
8Eveleth
Eveleth, MN
3,86520 of 2050.65 ppb
(23 to 99 ppb)
9East Grand Forks
East Grand Forks, MN
7,81622 of 2250.32 ppb
(31 to 109 ppb)
10Green Lake Sanitary Sewer & Water Dist.
Spicer, MN
1,50010 of 1049.15 ppb
(4.6 to 89 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 Minnesota

There are no violations reported for this contaminant in Minnesota