PFAS Systemwide Water Supply Treatment Improvements Engineering Services

The City of Downey is seeking engineering services for PFAS water supply treatment improvements, including pipeline systems and associated infrastructure.

City of Downey Public Works - Utilities Division


General
Open (bidding)
Jul 10, 2026 12:00 AM
Jun 11, 2026 01:15 AM
Request for Proposal (RFP)
Local
Contact
Fabian Aoun
dmueller@downeyca.org
+15629047110
Submission Instructions
Online
Description

The City of Downey is soliciting proposals for professional engineering services to design improvements for PFAS (per- and polyfluoroalkyl substances) water supply treatment. This project encompasses the northerly and southerly water supply treatment facilities, influent water distribution pipelines from existing groundwater wells to the treatment plants, product water transmission pipelines back to the City's existing water transmission system, and associated improvements. The scope of work includes the preparation of construction plans, specifications, engineer's estimates, and record drawings. The City relies entirely on groundwater for its potable water and fire flow demands, and all wells are impacted by PFAS, specifically PFOA and PFOS, at concentrations exceeding regulatory limits. This project aims to treat PFOS and PFOA to below the National Primary Drinking Water Regulation (NPDWR) Maximum Contaminant Level (MCL) of 4.0 nanograms per liter (ng/L). Additionally, the treatment system will target PFBS and PFHxS to concentrations below California (CA) Division of Drinking Water (DDW) Notification Levels (NLs) of 500 ng/L and 3 ng/L, respectively, and PFHxA below the proposed CA DDW NL of 1 ug/L. These engineering services are partially funded by federal funds and must comply with U.S. EPA Region 9 procurement requirements.

Classification Codes
NAICS221310Water Supply and Irrigation Systems
PSCC1NEARCHITECT AND ENGINEERING- CONSTRUCTION: WATER SUPPLY FACILITIES
Smart Codes
water treatment engineeringpfas remediation servicespipeline design
Specifications
Service Only
Timeline
Jun 11, 2026 12:00 PM-Bid Posted Date
Jul 02, 2026 12:00 PM-Q&A Deadline
Jul 10, 2026 12:00 PM-Bid Due Date
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