Granular Activated Carbon (GAC) Radon Reduction System

The granular activated carbon (GAC) system adsorbs radon and other volatile organic compounds (VOCs) from the well water. When used appropriately, properly installed and maintained regularly, it will yield approximately 90 - 95% radon reduction. The EPA recommends that this system only be used when radon in water content is less than 5,000 pCi/L to ensure no excessive buildup of hazardous waste.

The GAC system uses one, two or three carbon beds or tanks onto which the radon is adsorbed. If used improperly, or if the beds are left installed too long, the carbon may become ineffective and/or may become a source of radioactivity. Fluctuations in waterborne radon levels and bio-fouling can cause system failure (less than 80% removal efficiencies) within one year. For this reason, it is necessary to service GAC systems by changing one or more tanks annually.

GAC Service & Guarantees The carbon tanks used in a GAC system must be replaced annually to help ensure that the system will continue to reduce water radon concentrations to target levels. This also safeguards against possible contaminant buildup on the carbon tanks. Our EPA-listed technicians perform a thorough system check, replace carbon tank(s) and sediment filters, check all system components and re-test radon levels.

US Radon Management, Inc guarantees in writing all radon reduction systems we install. For guarantee details, contact our representative.

US Radon Management, Inc



866-723-6664 or 1-800-343-8304


(401) 349-5103


Monroe, Connecticut (PLM 0203633-P1)
Cortland, New York
Lincoln, Nebraska
Harmony, Rhode Island
Cape Cod, Massachusetts