August 21, 2019: Hazardous pharmaceutical waste prohibited from disposal down the drain. EPA’s newest rule requires healthcare facilities and other businesses that generate pharmaceutical hazardous waste to properly dispose of the waste. The first part of the rule, the prohibition on “sewering” hazardous pharmaceutical waste, is effective August 21. All nonhazardous pharmaceutical waste that are not controlled substances must be disposed as regulated medical waste. See Dental Office Waste Management Options. View resource August 21, 2019: Hazardous pharmaceutical waste prohibited from disposal down the drain.