The Power of Information

National Drinking Water Database

Pottawatomie County Rwd #3 Utilities - Shawnee, OK

Serves 560 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
5 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)
1 days
Test DaysNumber of days in which this chemical has reported results in the data we received from the State
36 days
Tests ConductedNumber of individual tests done for this contaminant
161 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.196.06 ppb
1159.33 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
2008-12-1834 ppb410 to 89.3 ppb
2008-12-1714.68 ppb13100 to 137 ppb
2008-12-16165.67 ppb320 to 497 ppb
2008-06-2699.35 ppb2080 to 1100 ppb
2007-12-209.6 ppb840 to 34.1 ppb
2007-12-1935.48 ppb940 to 135 ppb
2007-12-1814.8 ppb1014.8 ppb
2007-12-175.8 ppb210 to 11.6 ppb
2006-12-21161.97 ppb6025.8 to 704 ppb
2006-12-20759.1 ppb2028.2 to 1490 ppb
2006-12-19707.82 ppb6027.6 to 3070 ppb
2006-12-18219.77 ppb6021.4 to 1080 ppb
2006-03-2230.29 ppb710 to 109 ppb
2006-03-21206.27 ppb7011.2 to 1230 ppb
2006-03-2054.39 ppb7012 to 239 ppb
2005-09-25143.5 ppb20137 to 150 ppb
2005-09-24157 ppb10157 ppb
2005-09-23154 ppb10154 ppb
2005-09-22155 ppb10155 ppb
2005-09-20106.5 ppb20101 to 112 ppb
2005-09-18143 ppb10143 ppb
2005-09-17594.6 ppb5062 to 1990 ppb
2005-09-16155.5 ppb20154 to 157 ppb
2005-09-1559.5 ppb1059.5 ppb
2005-09-13124 ppb10124 ppb
2005-09-121159.33 ppb30158 to 1660 ppb
2004-12-20432.33 ppb3026 to 1210 ppb
2004-12-1723 ppb1023 ppb
2004-12-1434 ppb4023 to 45 ppb
2004-12-10103.6 ppb5029 to 270 ppb
2004-12-09281.67 ppb3017 to 696 ppb
2004-12-08161.25 ppb4034 to 433 ppb
2004-05-2424 ppb1024 ppb
2004-05-1464 ppb1064 ppb
2004-05-12275 ppb9018 to 1840 ppb
2004-05-11188.33 ppb9016 to 859 ppb