This document provides details for a federal contract solicitation to improve wastewater treatment facilities on tribal lands. The Zuni Wastewater Treatment Improvements solicitation issued by the Department of Health and Human Services Indian Health Service seeks a contractor to renovate and expand an existing 32.6-acre, six cell lagoon facility to a 49-acre, five cell treatment system. The two-phase construction approach will upgrade the wastewater treatment capacity. This acquisition is set aside for Indian Small Business Economic Enterprises in accordance with the Buy Indian Act. Interested parties should review the attached solicitation and documents for complete requirements and response dates.