- The KOA - Burlington / Anacortes KOA Campground is a popular RV dump station near Nooksack, Washington, offering to dump black and grey water, refill fresh water, and a hose for flushing tanks.- If you’re looking for a cheaper option, the Shell Station offers waste disposal for a reasonable price.- Another option is the Wastewater Treatment Plant, which has easy access and a trash bin available.- Lions Club Park also provides an RV dump station in Nooksack with accessible waste disposal services.