The Power of Information

National Drinking Water Database

Stoney Creek Sanitary District Utilities - Strasburg, VA

Serves 2,280 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
3 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
20 days
Tests ConductedNumber of individual tests done for this contaminant
27 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.142.91 ppb
469 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
2009-01-060 ppb330 ppb
2008-08-24356 ppb10356 ppb
2008-08-0240.4 ppb1040.4 ppb
2008-07-06154 ppb10154 ppb
2008-06-24469 ppb10469 ppb
2008-06-23104 ppb10104 ppb
2008-06-17176 ppb10176 ppb
2008-06-1674.2 ppb2054.1 to 94.3 ppb
2008-06-0341.3 ppb1041.3 ppb
2008-06-0298.3 ppb1098.3 ppb
2006-02-070 ppb330 ppb
2005-08-23119 ppb10119 ppb
2005-08-21109 ppb210 to 218 ppb
2005-08-0953.5 ppb210 to 107 ppb
2005-08-0864.5 ppb1064.5 ppb
2005-08-01443 ppb10443 ppb
2005-07-27228 ppb10228 ppb
2005-07-25145 ppb10145 ppb
2005-07-24183 ppb10183 ppb
2004-05-040 ppb110 ppb