Directions to Key Largo Wastewater Treatment District Directions to Key Largo Wastewater Treatment District Search | Advanced Search | New Members | Coupons and Discounts | All Categories Public Utilities & Environment >> Utilities Key Largo Wastewater Treatment District 103355 Overseas HighwayKey Largo, FL 33037 | map Peter Rosasco 305-451-4019 | fax: 305-453-5807 Visit Site Get directions to: Key Largo Wastewater Treatment District, 103355 Overseas Highway, Key Largo FL Get directions from: Click to Print This Page