CSL Radon Mitigation Inc. also serves Arthur, Ayr, Brantford, Cambridge, Centre Wellington, Drayton, Elmira, Erin, Grand Valley, Guelph, Harriston, Ingersoll, Listowel, Milverton, Mitchell, Mount Forest, New Hamburg, Orangeville, Palmerston, Paris, Rockwood, Shelburne, St. Marys, Stratford, Tavistock, Tillsonburg, Waterloo and Woodstock