OCEANSIDE, Calif. (UI) — The City of Oceanside will start construction in early 2026 on Phase II of its Downtown Water and Sewer Replacement Project, the second step in a five-phase program to modernize aging underground utilities.

Phase II will replace more than 3 miles of sewer and over 2.5 miles of water mains and add nearly 1 mile of recycled-water pipe downtown. Many of the targeted lines have reached advanced age, with some sewer mains approaching 100 years old. The work is intended to bring the system up to current standards and increase capacity to meet growth, while expanding recycled-water service to public, commercial and mixed-use properties for irrigation.

Construction is expected to last about two years. Traffic will generally be maintained; road closures or detours will occur at night only. Daytime work is limited to 8:00 a.m.–4:30 p.m. with additional restrictions in busier areas. No work will occur west of Myers Street during summer or during major events and weekly markets.

The project cost is roughly $30 million, funded by previously budgeted capital improvement funds and state and federal grants.

Phase I, completed between Neptune and Pier View Way, replaced 2.5 miles of water and over 1.5 miles of sewer infrastructure.