The Power of Information

National Drinking Water Database


City of Durham Utilities - Durham, NC


Serves 225,714 people

Copper

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
278 days
Tests ConductedNumber of individual tests done for this contaminant
788 tests

Testing Summary

ContaminantAverage/
Maximum
Result
Health Limit
Exceeded
Legal Limit
Exceeded

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.15.81 ppb
298 ppb
No
300 ppb
No
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

StandardDescriptionLevel
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
Result
Samples taken that dayNumber of Non-DetectsRange of Results
2009-02-230 ppb220 ppb
2009-02-160 ppb220 ppb
2009-02-090 ppb220 ppb
2009-02-020 ppb220 ppb
2009-01-260 ppb220 ppb
2009-01-200 ppb220 ppb
2009-01-120 ppb220 ppb
2009-01-050 ppb220 ppb
2008-12-290 ppb220 ppb
2008-12-220 ppb330 ppb
2008-12-150 ppb220 ppb
2008-12-120 ppb110 ppb
2008-12-080 ppb220 ppb
2008-12-010 ppb220 ppb
2008-11-240 ppb220 ppb
2008-11-170 ppb220 ppb
2008-11-15248 ppb10248 ppb
2008-11-100 ppb220 ppb
2008-11-030 ppb220 ppb
2008-10-270 ppb220 ppb
2008-10-200 ppb220 ppb
2008-10-130 ppb220 ppb
2008-10-060 ppb220 ppb
2008-09-290 ppb220 ppb
2008-09-2319.67 ppb320 to 59 ppb
2008-09-220 ppb220 ppb
2008-09-150 ppb220 ppb
2008-09-080 ppb220 ppb
2008-09-020 ppb220 ppb
2008-08-08144 ppb10144 ppb
2008-08-0646.5 ppb210 to 93 ppb
2008-08-050 ppb220 ppb
2008-06-1738.5 ppb210 to 77 ppb
2008-06-160 ppb110 ppb
2008-06-030 ppb110 ppb
2008-05-270 ppb220 ppb
2008-05-160 ppb110 ppb
2008-05-0254 ppb1054 ppb
2008-04-230 ppb110 ppb
2008-03-1784 ppb1084 ppb
2008-03-150 ppb110 ppb
2008-03-060 ppb110 ppb
2008-03-050 ppb110 ppb
2008-02-290 ppb110 ppb
2008-02-210 ppb110 ppb
2008-02-14136 ppb210 to 272 ppb
2008-02-060 ppb110 ppb
2008-01-2825.5 ppb210 to 51 ppb
2008-01-080 ppb110 ppb
2008-01-0678 ppb1078 ppb
2008-01-0591 ppb1091 ppb
2007-12-310 ppb110 ppb
2007-12-270 ppb220 ppb
2007-12-170 ppb110 ppb
2007-12-100 ppb220 ppb
2007-12-0476 ppb1076 ppb
2007-12-030 ppb220 ppb
2007-11-200 ppb110 ppb
2007-11-1570 ppb1070 ppb
2007-11-090 ppb220 ppb
2007-10-290 ppb220 ppb
2007-10-220 ppb220 ppb
2007-10-1987 ppb1087 ppb
2007-10-150 ppb220 ppb
2007-10-080 ppb220 ppb
2007-10-010 ppb220 ppb
2007-09-070 ppb110 ppb
2007-09-0230 ppb210 to 60 ppb
2007-08-290 ppb110 ppb
2007-08-240 ppb110 ppb
2007-08-230 ppb220 ppb
2007-08-220 ppb110 ppb
2007-08-180 ppb110 ppb
2007-08-170 ppb110 ppb
2007-08-140 ppb220 ppb
2007-08-090 ppb110 ppb
2007-08-030 ppb110 ppb
2007-08-020 ppb110 ppb
2007-07-310 ppb440 ppb
2007-07-260 ppb220 ppb
2007-07-250 ppb110 ppb
2007-07-240 ppb330 ppb
2007-07-200 ppb110 ppb
2007-07-190 ppb110 ppb
2007-07-110 ppb220 ppb
2007-07-105.9 ppb1090 to 59 ppb
2007-07-060 ppb110 ppb
2007-07-050 ppb220 ppb
2007-07-0253 ppb1053 ppb
2007-06-150 ppb220 ppb
2007-06-110 ppb110 ppb
2007-06-08298 ppb10298 ppb
2007-06-0753.4 ppb530 to 199 ppb
2007-06-060 ppb220 ppb
2007-06-050 ppb110 ppb
2007-06-040 ppb220 ppb
2007-06-030 ppb110 ppb
2007-06-0129.67 ppb310 to 55 ppb
2007-05-3123 ppb540 to 115 ppb
2007-05-300 ppb110 ppb
2007-05-290 ppb110 ppb
2007-05-23134.67 ppb3051 to 297 ppb
2007-05-170 ppb110 ppb
2007-05-110 ppb110 ppb
2007-05-090 ppb110 ppb
2007-05-080 ppb110 ppb
2007-05-0330.33 ppb630 to 78 ppb
2007-05-0266 ppb1066 ppb
2007-04-300 ppb110 ppb
2007-04-260 ppb220 ppb
2007-04-230 ppb110 ppb
2007-04-180 ppb110 ppb
2007-04-1755 ppb1055 ppb
2007-04-1648.5 ppb410 to 83 ppb
2007-04-140 ppb110 ppb
2007-04-1362.33 ppb3058 to 66 ppb
2007-04-1243 ppb310 to 65 ppb
2007-04-1054 ppb1054 ppb
2007-04-0943.33 ppb310 to 67 ppb
2007-04-0891 ppb1091 ppb
2007-04-0655 ppb1055 ppb
2007-04-0532.8 ppb540 to 164 ppb
2007-04-0444.75 ppb420 to 92 ppb
2007-04-0325.67 ppb320 to 77 ppb
2007-03-3147 ppb210 to 94 ppb
2007-03-3096 ppb2081 to 111 ppb
2007-03-29110 ppb10110 ppb
2007-03-2852 ppb1052 ppb
2007-03-260 ppb220 ppb
2007-03-23106.67 ppb3076 to 146 ppb
2007-03-22121 ppb10121 ppb
2007-03-21164 ppb10164 ppb
2007-03-2065.5 ppb2055 to 76 ppb
2007-03-1928.2 ppb530 to 72 ppb
2007-03-17147.5 ppb2065 to 230 ppb
2007-03-1651 ppb2051 ppb
2007-03-150 ppb110 ppb
2007-03-1225.5 ppb210 to 51 ppb
2007-03-0947.33 ppb310 to 71 ppb
2007-03-0871 ppb2057 to 85 ppb
2007-03-070 ppb110 ppb
2007-03-06132 ppb10132 ppb
2007-03-0520.33 ppb320 to 61 ppb
2007-03-04123 ppb20123 ppb
2007-03-03110 ppb10110 ppb
2007-03-010 ppb110 ppb
2007-02-280 ppb440 ppb
2007-02-2736.33 ppb310 to 57 ppb
2007-02-260 ppb330 ppb
2007-02-250 ppb220 ppb
2007-02-240 ppb110 ppb
2007-02-230 ppb660 ppb
2007-02-2217 ppb320 to 51 ppb
2007-02-2117.2 ppb540 to 86 ppb
2007-02-2052.91 ppb1190 to 481 ppb
2007-02-196.11 ppb980 to 55 ppb
2007-02-180 ppb110 ppb
2007-02-1618.44 ppb970 to 94 ppb
2007-02-1526.27 ppb15120 to 269 ppb
2007-02-140 ppb12120 ppb
2007-02-130 ppb22220 ppb
2007-02-124.92 ppb12110 to 59 ppb
2007-02-1120 ppb540 to 100 ppb
2007-02-1031 ppb210 to 62 ppb
2007-02-091.89 ppb27260 to 51 ppb
2007-02-084.44 ppb27260 to 120 ppb
2007-02-074.73 ppb37340 to 64 ppb
2007-02-0611.2 ppb540 to 56 ppb
2007-02-050 ppb220 ppb
2007-02-020 ppb110 ppb
2007-01-310 ppb110 ppb
2007-01-290 ppb220 ppb
2007-01-220 ppb220 ppb
2007-01-160 ppb220 ppb
2007-01-080 ppb220 ppb
2007-01-020 ppb220 ppb
2006-11-270 ppb220 ppb
2006-11-200 ppb220 ppb
2006-11-130 ppb220 ppb
2006-11-060 ppb220 ppb
2006-10-300 ppb220 ppb
2006-10-230 ppb220 ppb
2006-10-160 ppb220 ppb
2006-10-090 ppb220 ppb
2006-10-0680 ppb1080 ppb
2006-10-050 ppb110 ppb
2006-10-040 ppb220 ppb
2006-10-030 ppb110 ppb
2006-10-020 ppb330 ppb
2006-07-310 ppb220 ppb
2006-07-240 ppb220 ppb
2006-07-170 ppb220 ppb
2006-07-100 ppb220 ppb
2006-07-030 ppb110 ppb
2006-06-190 ppb110 ppb
2006-05-300 ppb220 ppb
2006-05-220 ppb220 ppb
2006-05-150 ppb220 ppb
2006-05-080 ppb220 ppb
2006-05-010 ppb220 ppb
2006-04-240 ppb220 ppb
2006-04-170 ppb220 ppb
2006-04-100 ppb220 ppb
2006-04-030 ppb220 ppb
2006-01-300 ppb220 ppb
2006-01-230 ppb220 ppb
2006-01-170 ppb220 ppb
2006-01-090 ppb220 ppb
2006-01-030 ppb220 ppb
2005-09-260 ppb220 ppb
2005-09-190 ppb220 ppb
2005-09-120 ppb220 ppb
2005-09-060 ppb220 ppb
2005-08-290 ppb220 ppb
2005-08-220 ppb220 ppb
2005-08-150 ppb220 ppb
2005-08-080 ppb220 ppb
2005-08-010 ppb220 ppb
2005-07-250 ppb440 ppb
2005-07-180 ppb440 ppb
2005-07-110 ppb440 ppb
2005-07-050 ppb440 ppb
2005-06-270 ppb220 ppb
2005-06-200 ppb220 ppb
2005-06-130 ppb110 ppb
2005-06-060 ppb220 ppb
2005-06-050 ppb110 ppb
2005-05-230 ppb440 ppb
2005-05-160 ppb440 ppb
2005-05-090 ppb440 ppb
2005-05-020 ppb440 ppb
2005-04-250 ppb220 ppb
2005-04-180 ppb220 ppb
2005-04-110 ppb220 ppb
2005-04-040 ppb220 ppb
2005-02-280 ppb220 ppb
2005-02-210 ppb220 ppb
2005-02-140 ppb220 ppb
2005-02-070 ppb220 ppb
2004-12-280 ppb220 ppb
2004-12-200 ppb220 ppb
2004-12-130 ppb220 ppb
2004-12-060 ppb220 ppb
2004-11-220 ppb220 ppb
2004-11-150 ppb220 ppb
2004-11-080 ppb220 ppb
2004-11-010 ppb220 ppb
2004-09-290 ppb110 ppb
2004-09-280 ppb110 ppb
2004-09-270 ppb220 ppb
2004-09-2446 ppb540 to 230 ppb
2004-09-237.14 ppb760 to 50 ppb
2004-09-220 ppb330 ppb
2004-09-210 ppb330 ppb
2004-09-200 ppb330 ppb
2004-09-178.33 ppb650 to 50 ppb
2004-09-160 ppb990 ppb
2004-09-150 ppb770 ppb
2004-09-140 ppb11110 ppb
2004-09-130 ppb770 ppb
2004-09-106.67 ppb12110 to 80 ppb
2004-09-090 ppb24240 ppb
2004-09-070 ppb220 ppb
2004-08-230 ppb220 ppb
2004-08-160 ppb220 ppb
2004-08-090 ppb220 ppb
2004-08-020 ppb220 ppb
2004-07-260 ppb220 ppb
2004-07-190 ppb220 ppb
2004-07-060 ppb220 ppb
2004-06-280 ppb220 ppb
2004-06-210 ppb220 ppb
2004-06-140 ppb220 ppb
2004-06-070 ppb220 ppb
2004-05-240 ppb220 ppb
2004-05-170 ppb220 ppb
2004-05-100 ppb220 ppb
2004-05-030 ppb220 ppb