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National Drinking Water Database


Chloroform in Ohio


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 Ohio

860 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)
1Village of Metamora
Metamora, OH
98015 of 15108.23 ppb
(61.2 to 198 ppb)
2City of Celina
Celina, OH
11,52012 of 1294.25 ppb
(10.73 to 203.21 ppb)
3Florida, Vlg of
Florida, OH
50010 of 1092.68 ppb
(38.2 to 158 ppb)
4Liberty Center, Vlg. of
Liberty Center, OH
1,35014 of 1492.26 ppb
(17.6 to 191 ppb)
5Village of Leetonia
Leetonia, OH
2,0801 of 180 ppb
(80 ppb)
6Elida Water Treatment Plant
Elida, OH
3,8009 of 968.46 ppb
(32.98 to 158 ppb)
7Village of Mcclure
Mcclure, OH
85010 of 1068.31 ppb
(32.9 to 121 ppb)
8Village of Lyons
Lyons, OH
69510 of 1066.34 ppb
(46.8 to 109 ppb)
9Village of Malinta
Malinta, OH
40010 of 1065.78 ppb
(34.5 to 158 ppb)
10Defiance Co-Brunersburg/Evansport Water System
Defiance, OH
26610 of 1065.58 ppb
(37.9 to 91.2 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 Ohio

There are no violations reported for this contaminant in Ohio