Fri, July 10, 2026 at 6:05 PM UTC San Luis Obispo will begin work on a major waterline replacement this month, bringing weeks of traffic impacts and intermittent water shutoffs to a stretch of the city. Beginning as early as July 20, the city will work to swap out a 1960s-era cast iron pipeline for a more durable ductile iron pipeline along California Boulevard and Taft Street.