At Bow River Gas, we put an odorant in the gas called Mercaptan. This is what gives natural gas the distinctive odor. If you smell this coming from you gas appliances you should, get out (do not turn anything on or off including lights) and call the Bow River Gas Co-op. If you are not in danger, ensure the room is well ventilated and call the Bow River Gas Co-op to come out and fix the leak