The EPA Continuous Reduction of Bacterial Contaminants test protocol requires multiple re-inoculation of copper and (stainless steel) control surfaces with MRSA over the course of a 24 hour day. The peaks on the red bar at top correspond to the times of the 8 MRSA inoculations—640,000 CFU to each of the copper and stainless steel samples, for a total of 5.1 million CFU over the course of the test. The copper surfaces continually killed all (or nearly all) the bacteria within the two hours before the next inoculation. The stainless steel surfaces, in comparison do not have inherent ability to kill bacteria, and over the course of the day, the total accumulation of MRSA on the stainless steel grew exponentially.
EPA-registered copper alloys also:
Continuously reduce bacterial* contamination, achieving 99.9% reduction within two hours of exposure.
Kill greater than 99.9% of Gram-negative and Gram-positive bacteria* within two hours of exposure.
Deliver continuous and ongoing antibacterial* action, remaining effective in killing greater than 99.9% of bacteria* within two hours.
Help inhibit the buildup and growth of bacteria* within two hours of exposure between routine cleaning and sanitizing step.