The Power of Information

National Drinking Water Database

Cedar Rapids Water Department Utilities - Cedar Rapids, IA

Serves 124,488 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
42 days
Tests ConductedNumber of individual tests done for this contaminant
204 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.32.91 ppb
250 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
2007-09-1310 ppb1010 ppb
2007-09-0730 ppb2020 to 40 ppb
2007-08-3140 ppb1040 ppb
2007-08-2920 ppb1020 ppb
2007-08-2430 ppb1030 ppb
2007-08-1823.33 ppb310 to 40 ppb
2007-08-1724 ppb1510 to 70 ppb
2007-08-1635.5 ppb2030 to 110 ppb
2007-08-1516.67 ppb620 to 40 ppb
2006-09-13250 ppb10250 ppb
2006-08-2340 ppb2030 to 50 ppb
2006-08-080 ppb110 ppb
2006-08-0760 ppb1060 ppb
2006-08-0324 ppb1540 to 60 ppb
2006-08-0233.45 ppb2930 to 110 ppb
2006-07-3120 ppb1020 ppb
2005-08-1850 ppb2040 to 60 ppb
2005-08-1720 ppb1020 ppb
2005-08-1530 ppb2020 to 40 ppb
2005-08-1125 ppb410 to 50 ppb
2005-08-1039.29 ppb1430 to 240 ppb
2005-08-0930 ppb3020 to 40 ppb
2005-08-0810 ppb1010 ppb
2005-08-050 ppb110 ppb
2005-08-0420 ppb1020 ppb
2005-08-0318.82 ppb1750 to 50 ppb
2005-08-0211.43 ppb730 to 30 ppb
2004-09-2550 ppb1050 ppb
2004-08-1810 ppb1010 ppb
2004-08-160 ppb110 ppb
2004-08-1410 ppb1010 ppb
2004-08-1323.33 ppb310 to 50 ppb
2004-08-1245 ppb2040 to 50 ppb
2004-08-1154 ppb1520 to 360 ppb
2004-08-1020 ppb1020 ppb
2004-08-0537 ppb1037 ppb
2004-08-0239.64 ppb1105 to 64 ppb
2004-08-0150 ppb1050 ppb
2004-07-3143.5 ppb2028 to 59 ppb
2004-07-3019.75 ppb403 to 41 ppb
2004-07-2918.33 ppb606 to 35 ppb
2004-07-2750 ppb1050 ppb