The Power of Information

National Drinking Water Database


East Hampton Wpca - Village Center Utilities - Middletown, CT


Serves 366 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
9 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
14 days
Tests ConductedNumber of individual tests done for this contaminant
28 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.458.21 ppb
1020 ppb
Yes
300 ppb
Yes
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
2007-08-20310 ppb10310 ppb
2007-07-31615 ppb40290 to 1060 ppb
2007-07-20294 ppb50140 to 480 ppb
2007-06-29760 ppb10760 ppb
2007-06-27140 ppb210 to 280 ppb
2007-05-14310 ppb10310 ppb
2007-05-071020 ppb101020 ppb
2007-05-04476 ppb50300 to 610 ppb
2007-04-17765 ppb20300 to 1230 ppb
2006-08-24360 ppb10360 ppb
2006-07-31300 ppb10300 ppb
2006-07-25200 ppb10200 ppb
2006-07-20835 ppb20470 to 1200 ppb
2005-07-1430 ppb1030 ppb