The Power of Information

National Drinking Water Database

Moline Utilities - Rock Island, IL

Serves 44,718 people


Copper is a naturally occuring metal and drinking water contaminant that enters tap water by corrosion of household plumbing systems and erosion of natural deposits.
This Drinking Water System
Test Days Exceeding Health GuidelinesDefinition of what this is
0 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
27 days
Tests ConductedNumber of individual tests done for this contaminant
151 tests

Testing Summary

Health Limit
Legal Limit

Testing History

-Tested      -Detected      -Over Health Guidelines      -Over Legal Limit*
CopperCopper is a naturally occuring metal and drinking water contaminant that enters tap water by corrosion of household plumbing systems and erosion of natural deposits.73.78 ppb
211.5 ppb
300 ppb
1000 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 Copper

Health Based Limits for Copper

California Public Health GoalsDefined by the State of California Office of Environmental Health Hazard Assessment (OEHHA) as the level of contaminant that is allowed in drinking water. For acutely toxic substances, levels are set at which scientific evidence indicates that no known or anticipated adverse effects on health will occur, plus an adequate margin-of safety. PHGs for carcinogens or other substances which can cause chronic disease shall be based solely on health effects without regard to cost impacts and shall be set at levels which OEHHA has determined do not pose any significant risk to health.300 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. 1000 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.1300 ppb
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.1300 ppb

Testing Results

Testing DateAverage
Samples taken that dayNumber of Non-DetectsRange of Results
2008-09-0373 ppb1073 ppb
2008-08-2192 ppb2089 to 95 ppb
2008-08-2064 ppb1064 ppb
2008-08-1969 ppb1069 ppb
2008-08-0685 ppb1085 ppb
2008-08-0526 ppb1026 ppb
2008-08-0273.5 ppb2070 to 77 ppb
2008-08-018.8 ppb108.8 ppb
2008-07-3157.44 ppb920 to 160 ppb
2008-07-3070.67 ppb610 to 160 ppb
2008-07-2964 ppb510 to 140 ppb
2006-05-22130 ppb20120 to 140 ppb
2006-05-18110 ppb10110 ppb
2006-05-1713 ppb1013 ppb
2006-05-1681 ppb1081 ppb
2006-05-1572 ppb3044 to 100 ppb
2006-05-1354.33 ppb306 to 120 ppb
2006-05-1282.33 ppb3011 to 210 ppb
2006-05-1192.5 ppb1206 to 350 ppb
2006-05-1063 ppb803 to 120 ppb
2006-05-0982.04 ppb2604 to 360 ppb
2005-12-1313 ppb210 to 26 ppb
2005-12-1227 ppb1027 ppb
2005-12-09211.5 ppb4086 to 530 ppb
2005-12-08102.88 ppb8078 to 150 ppb
2005-12-0793.29 ppb1710 to 290 ppb
2005-12-0680.86 ppb2950 to 310 ppb