Copper Leaching and Its Effects on Food and Water
Copper leaching is a process in which metallic copper can dissolve and enter acidic foods and beverages, potentially leading to toxicity. To address this concern, several states have implemented the FDA Model Food Code, which prohibits direct contact between copper and foods with a pH below 6.0. This includes popular items like chocolate, cheese, fruit juice, vinegar, and even the Moscow mule cocktail, often served in a copper cup.
Recognizing the potential health risks, both the World Health Organization (WHO) and the U.S. Environmental Protection Agency have established guidelines for safe copper levels in drinking water. To avoid copper poisoning, these organizations recommend maintaining copper concentrations in drinking water between 1.3 to 2 mg per liter.
While the Centers for Disease Control and Prevention assure that copper levels in surface and groundwater are typically minimal, there is a concern about elevated levels. Such elevated levels can enter the environment through wastewater discharges from various industries, including agriculture, manufacturing, and mining operations.
Testing Copper Levels in Your Water
If your home is equipped with copper pipes, it is essential to ensure that the levels of copper in your water supply are within a safe range. Certified laboratories can perform water analysis to determine the copper content. While boiling water does not reduce copper levels, there are other effective methods for removing copper from your water, such as distillation, reverse osmosis, and ultra-filtration. If you suspect that your plumbing system may be causing excessive copper exposure, it is advisable to let the water run from each faucet for at least 15 seconds before using it.