- When in Lanai, Hawaii, you have a few options for RV dump stations.- The Lanai Landfill is available for dumping your black water and gray water tanks.- For fresh water refill and hose for flushing tanks, you can visit the Olowalu Recycling & Refuse Convenience Center.- If you're planning a trip to Molokai, the Molokai-Naiwa Landfill & Recycling Center offers dumping facilities.- Another option is the Central Maui Landfill - Refuse & Recycling Center, which provides RV waste disposal services.- Remember to dispose of your trash in the designated RV trash bins at these locations.