Drinking Water Systems Identification and Assessments for Tribal Systems

The Rural Community Assistance Corporation (RCAC) is requesting proposals for RFP No. 2026-1 to perform drinking water systems identification and modeled source water assessments. The selected contractor, or prime contractor-led team, will evaluate 16 tribal public water systems across EPA Region 10 in two phases. Scope includes data verification, hydrogeologic technical memorandums, source water delineations, potential contaminant source inventories with risk rankings, maps, final assessment reports, and plain-language summaries for each system. Eligibility is restricted to USA onshore organizations. Proposers must disclose potential conflicts of interest via Exhibit E and include a signed Certificate of Non-Collusion (Exhibit F). Subcontracting requires prior written approval from RCAC. Services will be performed offsite. Digital proposals are due by December 21, 2026, at 5:00 PM PST via email or online, with an anticipated award date of January 15, 2027. Phase 1 ends August 30, 2027, while Phase 2 timing depends on a notice to proceed. Proposers must submit pricing using the Exhibit C template to allow cost evaluations by phase and total project level.