The Power of Information

National Drinking Water Database

Greenwood Acres Water Co. Utilities - Des Moines, IA

Serves 325 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
26 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)
15 days
Test DaysNumber of days in which this chemical has reported results in the data we received from the State
26 days
Tests ConductedNumber of individual tests done for this contaminant
61 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.1216.88 ppb
3130 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
2008-09-052040 ppb102040 ppb
2008-09-02309.28 ppb4031.1 to 518 ppb
2008-08-281060 ppb101060 ppb
2008-08-27494.67 ppb30183 to 968 ppb
2008-08-26652 ppb10652 ppb
2007-07-24315 ppb10315 ppb
2007-07-191180 ppb101180 ppb
2007-07-181913.33 ppb301560 to 2240 ppb
2006-06-28436 ppb10436 ppb
2006-06-27494 ppb3054 to 1320 ppb
2006-06-261180 ppb101180 ppb
2005-08-031491.8 ppb100371 to 4630 ppb
2005-03-051252.5 ppb20995 to 1510 ppb
2005-03-033130 ppb103130 ppb
2005-03-021335.4 ppb50737 to 1740 ppb
2005-03-011600 ppb201250 to 1950 ppb
2004-11-29329 ppb10329 ppb
2004-09-23640 ppb10640 ppb
2004-09-222160 ppb102160 ppb
2004-09-21859.5 ppb20119 to 1600 ppb
2004-09-20327.5 ppb4096 to 886 ppb
2004-09-19755 ppb2050 to 1460 ppb
2004-05-212120 ppb102120 ppb
2004-05-201259 ppb50315 to 1920 ppb
2004-05-191980 ppb201170 to 2790 ppb
2004-05-182325 ppb201320 to 3330 ppb