The Power of Information

National Drinking Water Database


Metropolitan Utilities District Utilities - Omaha, NE


Serves 506,420 people

Chloroform

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.
 
This Drinking Water System
Test Days Exceeding Health GuidelinesDefinition of what this is
35 days
Test Days Exceeding Legal LimitsNumber of days in which the samples taken in that day exceed the Maximum Contaminant Level (Depending on the contaminant and its MCL, that may or may not trigger an MCL violation. Some MCLs are based on averages spanning several months to a year)
0 days
Test DaysNumber of days in which this chemical has reported results in the data we received from the State
88 days
Tests ConductedNumber of individual tests done for this contaminant
577 tests

Testing Summary

ContaminantAverage/
Maximum
Result
Health Limit
Exceeded
Legal Limit
Exceeded

Testing History

-Tested      -Detected      -Over Health Guidelines      -Over Legal Limit*
ChloroformChloroform 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.10.99 ppb
79.13 ppb
Yes
5.7 ppb
No
80 ppb
NOTE: Each dot in the above graph represents one month.
* Water utilities are noted as exceeding the legal limit if any test is above the maximum contaminant level (MCL). Most MCLs are based on annual averages so exceeding the MCL for one test does not necessarily indicate that the system is out of compliance.

Health Based and Legal Limits for Chloroform

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

Testing Results

Testing DateAverage
Result
Samples taken that dayNumber of Non-DetectsRange of Results
2008-12-0821.65 ppb36016.23 to 26.26 ppb
2008-10-1410.63 ppb3010.63 ppb
2008-09-2913.79 ppb12012.63 to 14.96 ppb
2008-09-0223.49 ppb36120 to 37.65 ppb
2008-08-047.19 ppb1560 to 19 ppb
2008-07-280 ppb330 ppb
2008-07-087.1 ppb307.1 ppb
2008-06-250 ppb660 ppb
2008-06-2379.13 ppb24075 to 85 ppb
2008-05-120 ppb990 ppb
2008-05-0725 ppb3025 ppb
2008-05-0535 ppb3035 ppb
2008-04-282 ppb302 ppb
2008-04-090 ppb330 ppb
2008-04-070 ppb660 ppb
2008-03-1868.25 ppb24023 to 130 ppb
2007-10-2936.25 ppb24030 to 43 ppb
2007-09-283.9 ppb303.9 ppb
2007-08-2051.5 ppb24046 to 67 ppb
2007-07-100 ppb330 ppb
2007-06-060 ppb330 ppb
2007-05-2967.75 ppb24049 to 89 ppb
2007-05-220 ppb660 ppb
2007-05-0831.83 ppb909.5 to 46 ppb
2007-02-2711.71 ppb2408.9 to 15 ppb
2006-11-2815.75 ppb24014 to 19 ppb
2006-09-1122 ppb3022 ppb
2006-08-280 ppb330 ppb
2006-08-0924 ppb3024 ppb
2006-08-081 ppb301 ppb
2006-08-0732.75 ppb24028 to 44 ppb
2006-07-242.85 ppb602.2 to 3.5 ppb
2006-07-195.8 ppb305.8 ppb
2006-07-104.03 ppb930 to 10 ppb
2006-06-140 ppb330 ppb
2006-05-0935.16 ppb24031 to 44 ppb
2006-04-110 ppb330 ppb
2006-04-1020.5 ppb6011 to 30 ppb
2006-01-1811.55 ppb2409.5 to 14 ppb
2005-11-1413.88 ppb8011 to 16 ppb
2005-09-2618.5 ppb2014 to 23 ppb
2005-09-1351.5 ppb8036 to 56 ppb
2005-08-2324 ppb210 to 48 ppb
2005-08-022.2 ppb102.2 ppb
2005-07-250 ppb110 ppb
2005-05-235.64 ppb420 to 22 ppb
2005-05-170 ppb110 ppb
2005-04-180 ppb220 ppb
2005-04-1322.5 ppb2012 to 33 ppb
2005-04-110 ppb220 ppb
2005-04-0513.25 ppb8010 to 17 ppb
2005-03-150.9 ppb100.9 ppb
2005-03-141.4 ppb101.4 ppb
2005-03-090 ppb110 ppb
2005-03-080 ppb110 ppb
2005-03-071.3 ppb101.3 ppb
2005-03-020 ppb110 ppb
2005-03-010 ppb110 ppb
2005-02-280 ppb110 ppb
2005-02-080 ppb110 ppb
2005-01-3111 ppb805.7 to 18 ppb
2004-11-300 ppb220 ppb
2004-11-160 ppb220 ppb
2004-11-090 ppb110 ppb
2004-11-020 ppb110 ppb
2004-10-260 ppb220 ppb
2004-10-190 ppb220 ppb
2004-10-1225.25 ppb8021 to 29 ppb
2004-10-060 ppb220 ppb
2004-09-290 ppb220 ppb
2004-09-210 ppb220 ppb
2004-09-140 ppb110 ppb
2004-09-130 ppb220 ppb
2004-08-310 ppb220 ppb
2004-08-240 ppb220 ppb
2004-08-170 ppb220 ppb
2004-08-030 ppb220 ppb
2004-07-200 ppb220 ppb
2004-07-130 ppb220 ppb
2004-07-1228 ppb902 to 47 ppb
2004-06-300 ppb110 ppb
2004-06-220 ppb110 ppb
2004-04-120 ppb110 ppb
2004-04-070 ppb110 ppb
2004-04-0531.9 ppb8017 to 49 ppb
2004-03-2234.5 ppb2020 to 49 ppb
2004-03-080 ppb220 ppb
2004-01-289.56 ppb803.9 to 17 ppb