On July 1, 2026, the New York State Department of Environmental Conservation ("NYSDEC") published proposed amendments to 6 NYCRR Parts 360 and 363 that would fundamentally change how landfill leachate is managed throughout the State. If adopted, the proposal would require municipal solid waste ("MSW") landfills and certain construction and demolition ("C&D") debris landfills to treat landfill leachate before it may be discharged to the environment.