A RCRA hazardous waste is a waste that either appears on one of three lists created by the U.S. Environmental Protection Agency, or, if not on the lists, exhibits one of four characteristics of hazardous waste.
How often should oxygen nasal cannulas be changed? Update: Our supplier recommended we change the cannulas monthly and the tubing every 60-90 days. My father has friends who's suppliers have had different guidelines.
Do I need to replace filters, and if so, how often? Most evaporative cool moisture humidifiers use replaceable wick filters, and these should be changed every 2 months on average (wick filter life varies depending on your specific humidifier model, frequency of use, and your water's mineral content).