MadSci Network: Environment/Ecology
Query:

RE: safe copper levels in drinking water

Area: Environment/Ecology
Posted By: David Kopaska-Merkel, Staff Hydrogeology Division, Geological Survey of Alabama
Date: Mon Oct 28 17:07:43 1996
Message:

Dear Terry:

Maximum safe levels for many contaminants are set by the Environmental Protection Agency (USEPA). As of 1992, copper was listed under Secondary Drinking Water Standards. This means that the listed level is recommended, but is not enforced. The recommended level for copper was (in 1992) 1 milligram per liter, which is about 1 part per million. USEPA has been considering changing lead and copper regulations, but I do not believe the proposed changes affect the recommended maximum copper concentration.

Although your measured level was 5 times the recommended level, this may not mean you are under a significant health risk.

Copper can be removed from water by chemical precipitation. I suggest you contact a local supplier of home water-treatment equipment and find out whether a device that would remove copper is available and affordable. You might want to contact the American Water Works Association at http://www.awwa.org for information both about the potential dangers of 5 ppm of copper and what you can do about it. The AWWA is a reputable organization and its members include many people experienced in water treatment for drinking purposes.

Another source you should check out is the USEPA, which I am sure you can locate online wth any web browser.

I hope this information is helpful.

David


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