The Power of Information

National Drinking Water Database

Cliffdale West Utilities - Fayetteville, NC

Serves 15,288 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
6 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)
2 days
Test DaysNumber of days in which this chemical has reported results in the data we received from the State
22 days
Tests ConductedNumber of individual tests done for this contaminant
42 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.328.84 ppb
2580 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
2007-07-1675.5 ppb1075.5 ppb
2007-07-13141 ppb10141 ppb
2007-07-0761.6 ppb1061.6 ppb
2007-07-06365.67 ppb310 to 894 ppb
2007-07-05156.5 ppb20151 to 162 ppb
2007-07-04286 ppb10286 ppb
2007-07-03428.7 ppb2088.4 to 769 ppb
2007-06-280 ppb110 ppb
2004-08-040 ppb220 ppb
2004-08-0280 ppb1080 ppb
2004-07-29160 ppb310 to 290 ppb
2004-07-2885 ppb210 to 170 ppb
2004-07-2780 ppb510 to 170 ppb
2004-07-2697.5 ppb420 to 220 ppb
2004-07-220 ppb110 ppb
2004-07-21340 ppb10340 ppb
2004-07-192580 ppb102580 ppb
2004-07-18305 ppb20140 to 470 ppb
2004-07-1750 ppb1050 ppb
2004-07-16142 ppb510 to 410 ppb
2004-07-1590 ppb1090 ppb
2004-07-121710 ppb101710 ppb