H&H performed a study of per-and polyfluorinated alkyl substances (PFAS) and 1,4-dioxane in landfill leachate at nine active municipal solid waste landfills across North Carolina. At each facility, H&H collected leachate samples in accordance with appropriate PFAS sampling protocol. The laboratory results were used in conjunction with leachate volumes to estimate the mass of PFAS and 1,4-dioxane discharged to local wastewater treatment plants (WWTPs). Where WWTP effluent sampling data were available, H&H also performed calculations to demonstrate that landfill leachate was not a primary contributor to the overall mass of PFAS and 1,4-dioxane in the WWTP effluent and non-leachate sources contribute greater mass. H&H participated in meetings with NC DEQ DWM representatives to discuss the sampling activities and results. This collective study represents a high profile project in NC and the report is posted on the NC DEQ website.