The Power of Information

National Drinking Water Database


Metropolitan Utilities District Utilities - Omaha, NE


Serves 506,420 people

Manganese

Manganese is a naturally occurring element released from mineral deposits as well as industrial use.
 
This Drinking Water System
Test Days Exceeding Health GuidelinesDefinition of what this is
25 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)
25 days
Test DaysNumber of days in which this chemical has reported results in the data we received from the State
33 days
Tests ConductedNumber of individual tests done for this contaminant
54 tests

Testing Summary

ContaminantAverage/
Maximum
Result
Health Limit
Exceeded
Legal Limit
Exceeded

Testing History

-Tested      -Detected      -Over Health Guidelines      -Over Legal Limit*
ManganeseManganese is a naturally occurring element released from mineral deposits as well as industrial use.472.69 ppb
2000 ppb
Yes
50 ppb
Yes
50 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 Manganese

Health Based Limits for Manganese

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.50 ppb
National Secondary Drinking Water RegulationsA National Secondary Drinking Water Regulation is a non-enforceable guideline regarding contaminants that may cause cosmetic effects (such as taste, odor, or color). Some states choose to adopt them as enforceable standards. Source: U.S. Environmental Protection Agency. 50 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.300 ppb
Health-Based Screening LevelA benchmark concentration of contaminants in water that may be of potential concern for human health, if exceeded. For noncarcinogens, the HBSL represents the contaminant concentration in drinking water that is not expected to cause any adverse effects over a lifetime of exposure. For carcinogens, the HBSL range represents the contaminant concentration in drinking water that corresponds to an excess estimated lifetime cancer risk of 1 chance in 1 million to 1 chance in 10 thousand. Source: U.S. Geological Survey.300 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.1000 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.1000 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.1600 ppb

Testing Results

Testing DateAverage
Result
Samples taken that dayNumber of Non-DetectsRange of Results
2008-04-09668 ppb30668 ppb
2008-04-07296.5 ppb60165 to 428 ppb
2005-04-12103 ppb10103 ppb
2005-04-1110 ppb1010 ppb
2005-03-1566.5 ppb1066.5 ppb
2005-03-1487.9 ppb1087.9 ppb
2005-03-09259 ppb10259 ppb
2005-03-08546 ppb10546 ppb
2005-03-07206 ppb10206 ppb
2005-03-02158 ppb10158 ppb
2005-03-0124.7 ppb1024.7 ppb
2005-02-281.77 ppb101.77 ppb
2005-02-141110 ppb101110 ppb
2005-02-082000 ppb102000 ppb
2004-11-301770 ppb20860 to 2680 ppb
2004-11-16455 ppb20220 to 690 ppb
2004-11-091120 ppb101120 ppb
2004-11-0230 ppb1030 ppb
2004-10-2630 ppb2020 to 40 ppb
2004-10-19840 ppb2080 to 1600 ppb
2004-10-0670 ppb210 to 140 ppb
2004-09-29206.65 ppb2010.3 to 403 ppb
2004-09-2151 ppb207.99 to 94 ppb
2004-09-1335.8 ppb2022.7 to 48.9 ppb
2004-08-318.46 ppb206.41 to 10.5 ppb
2004-08-24104.2 ppb2035.4 to 173 ppb
2004-08-17132 ppb20104 to 160 ppb
2004-08-031234.5 ppb20229 to 2240 ppb
2004-07-20608.5 ppb20484 to 733 ppb
2004-07-13508.5 ppb20428 to 589 ppb
2004-06-301890 ppb101890 ppb
2004-06-22957 ppb10957 ppb
2004-04-079.74 ppb109.74 ppb