The Power of Information

National Drinking Water Database


South Central Connecticut Regional Water Authority Utilities - New Haven, CT


Serves 389,300 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
139 days
Tests ConductedNumber of individual tests done for this contaminant
622 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.31.17 ppb
265.71 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
2007-04-1980 ppb1080 ppb
2007-03-080 ppb110 ppb
2007-03-070 ppb110 ppb
2007-03-063.33 ppb980 to 30 ppb
2007-03-055 ppb210 to 10 ppb
2006-06-070 ppb110 ppb
2006-06-0618.75 ppb840 to 110 ppb
2006-06-050 ppb110 ppb
2006-05-168.75 ppb850 to 50 ppb
2006-05-150 ppb110 ppb
2006-05-0215 ppb860 to 100 ppb
2006-05-010 ppb110 ppb
2006-04-1815 ppb850 to 100 ppb
2006-04-170 ppb110 ppb
2006-04-0413.75 ppb860 to 100 ppb
2006-04-030 ppb110 ppb
2006-03-2115 ppb850 to 100 ppb
2006-03-200 ppb110 ppb
2006-03-0713.75 ppb860 to 100 ppb
2006-03-060 ppb110 ppb
2006-02-27100 ppb10100 ppb
2006-02-212.5 ppb860 to 10 ppb
2006-02-0710.5 ppb20120 to 100 ppb
2006-02-060 ppb220 ppb
2006-01-2413.75 ppb860 to 100 ppb
2006-01-230 ppb110 ppb
2006-01-1015 ppb850 to 90 ppb
2006-01-090 ppb110 ppb
2005-12-2015 ppb850 to 90 ppb
2005-12-190 ppb110 ppb
2005-12-090 ppb110 ppb
2005-12-0611.43 ppb750 to 70 ppb
2005-11-1740 ppb1040 ppb
2005-11-160 ppb110 ppb
2005-11-1512.5 ppb850 to 80 ppb
2005-11-1047.5 ppb820 to 150 ppb
2005-11-0920 ppb720 to 50 ppb
2005-11-0841.67 ppb610 to 90 ppb
2005-11-0730 ppb4010 to 60 ppb
2005-11-0116.25 ppb840 to 100 ppb
2005-10-310 ppb110 ppb
2005-10-1820 ppb630 to 100 ppb
2005-10-170 ppb110 ppb
2005-10-060 ppb110 ppb
2005-10-0410.83 ppb1270 to 80 ppb
2005-10-030 ppb110 ppb
2005-09-2390 ppb1090 ppb
2005-09-2014.29 ppb740 to 80 ppb
2005-09-190 ppb110 ppb
2005-09-0616.36 ppb1140 to 100 ppb
2005-08-2310 ppb1050 to 20 ppb
2005-08-1580 ppb1080 ppb
2005-08-1122.86 ppb720 to 70 ppb
2005-08-1031.67 ppb620 to 80 ppb
2005-08-0918.82 ppb1780 to 100 ppb
2005-08-0863.33 ppb310 to 110 ppb
2005-08-0330 ppb1030 ppb
2005-08-01170 ppb20140 to 200 ppb
2005-07-28170 ppb820 to 690 ppb
2005-07-22160 ppb10160 ppb
2005-07-21265.71 ppb710 to 520 ppb
2005-07-1920 ppb830 to 90 ppb
2005-07-180 ppb110 ppb
2005-07-1576 ppb510 to 130 ppb
2005-07-1470 ppb2060 to 80 ppb
2005-07-07185 ppb20160 to 210 ppb
2005-07-0517.78 ppb950 to 100 ppb
2005-07-01140 ppb10140 ppb
2005-06-30127.5 ppb810 to 180 ppb
2005-06-28150 ppb10150 ppb
2005-06-2480 ppb310 to 160 ppb
2005-06-2390 ppb1110 to 170 ppb
2005-06-2126.67 ppb940 to 100 ppb
2005-06-200 ppb110 ppb
2005-06-1760 ppb1060 ppb
2005-06-16108.46 ppb1320 to 260 ppb
2005-06-0717.5 ppb840 to 90 ppb
2005-06-060 ppb110 ppb
2005-05-2418.75 ppb820 to 90 ppb
2005-05-2310 ppb1010 ppb
2005-05-105.71 ppb730 to 10 ppb
2005-05-090 ppb110 ppb
2005-05-0515.71 ppb730 to 40 ppb
2005-05-0423.33 ppb610 to 50 ppb
2005-05-0317.5 ppb420 to 50 ppb
2005-05-0220 ppb2010 to 30 ppb
2005-04-2080 ppb1080 ppb
2005-04-1913.33 ppb610 to 20 ppb
2005-04-180 ppb110 ppb
2005-04-0517.14 ppb730 to 90 ppb
2005-04-040 ppb110 ppb
2005-03-230 ppb110 ppb
2005-03-2216.67 ppb630 to 80 ppb
2005-03-215 ppb210 to 10 ppb
2005-03-160 ppb110 ppb
2005-03-1018 ppb1030 to 60 ppb
2005-03-0920 ppb620 to 40 ppb
2005-03-0810.87 ppb23120 to 80 ppb
2005-03-0720 ppb2010 to 30 ppb
2005-02-1520 ppb730 to 100 ppb
2005-02-140 ppb110 ppb
2005-02-0117.14 ppb740 to 90 ppb
2005-01-310 ppb110 ppb
2005-01-1817.5 ppb850 to 80 ppb
2005-01-0413.33 ppb640 to 70 ppb
2005-01-030 ppb110 ppb
2005-01-0120 ppb1020 ppb
2004-06-2540 ppb1040 ppb
2004-06-226.67 ppb640 to 20 ppb
2004-06-210 ppb110 ppb
2004-06-0830 ppb730 to 110 ppb
2004-06-0710 ppb1010 ppb
2004-05-2470 ppb1070 ppb
2004-05-1820 ppb630 to 100 ppb
2004-05-1710 ppb1010 ppb
2004-05-1270 ppb1070 ppb
2004-05-0418.33 ppb630 to 90 ppb
2004-05-0310 ppb1010 ppb
2004-04-21110 ppb10110 ppb
2004-04-2016.67 ppb640 to 90 ppb
2004-04-1940 ppb1040 ppb
2004-04-07100 ppb10100 ppb
2004-04-0620 ppb640 to 110 ppb
2004-04-0510 ppb1010 ppb
2004-03-2480 ppb1080 ppb
2004-03-2318.57 ppb750 to 120 ppb
2004-03-1095 ppb2010 to 180 ppb
2004-03-0916.67 ppb640 to 90 ppb
2004-02-1715.71 ppb750 to 100 ppb
2004-02-1275 ppb210 to 150 ppb
2004-02-110 ppb220 ppb
2004-02-1018.57 ppb730 to 80 ppb
2004-02-0911 ppb202 to 20 ppb
2004-02-0320 ppb640 to 110 ppb
2004-02-0212.5 ppb420 to 40 ppb
2004-01-3030 ppb1030 ppb
2004-01-2016.25 ppb840 to 90 ppb
2004-01-0624.29 ppb740 to 130 ppb
2004-01-0510 ppb1010 ppb