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National Drinking Water Database


Chloroform in Illinois


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 Illinois

1,391 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)
1Ladd
Ladd, IL
1,3135 of 585.46 ppb
(13 to 146 ppb)
2Panama
Panama, IL
38023 of 2474.79 ppb
(0 to 150.5 ppb)
3West Brooklyn
West Brooklyn, IL
18611 of 1168.77 ppb
(38.95 to 126.7 ppb)
4Alto Pass Water District
Alto Pass, IL
1,03122 of 2266.87 ppb
(35.46 to 145.4 ppb)
5Central Macoupin County Rwd
Jerseyville, IL
1,40029 of 2965.2 ppb
(15.3 to 167 ppb)
6Chesterfield
Chesterfield, IL
18016 of 1662.26 ppb
(14 to 108 ppb)
7Altamont
Altamont, IL
2,30022 of 2261.76 ppb
(18.75 to 120 ppb)
8Sims
Sims, IL
35421 of 2160.11 ppb
(16.58 to 196.8 ppb)
9Cooksville
Cooksville, IL
21321 of 2259.42 ppb
(0 to 175.6 ppb)
10Mulberry Grove
Mulberry Grove, IL
72521 of 2159.33 ppb
(8.8 to 116.4 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 Illinois

There are no violations reported for this contaminant in Illinois