Irrigation System Flushing: Districts 12-14

Beginning in October 2026, our Utilities Operations and Maintenance contractor, Jacobs, will begin flushing the SEWWCA irrigation system located in Districts 12–14.

Unidirectional flushing (UDF) is a preventive maintenance practice used to keep the irrigation system functioning efficiently and reliably. Unlike traditional flushing, where water may flow in multiple directions, unidirectional flushing isolates sections of the irrigation system so water moves at a higher velocity in a single direction. This controlled flow scours the inside of the pipes, removing accumulated sediment, sand, silt, algae, organic material, and mineral deposits that naturally build up over time.

The benefits of unidirectional flushing include:

• Improved water flow by removing deposits that can restrict pipes and reduce irrigation pressure.
• Reduced maintenance costs by preventing clogged valves, sprinkler heads, filters, and other irrigation components.
• Extended infrastructure life because sediment and debris can accelerate wear on pumps, valves, and piping.
• Improved irrigation performance by ensuring more consistent water delivery throughout the system.
• Enhanced water quality by removing accumulated organic material that can contribute to odors, discoloration, or biological growth within the distribution system.
• Early identification of system issues, such as leaks, damaged valves, or areas with excessive sediment accumulation.

Rest assured that the water used during unidirectional flushing is not wasted. Instead, the flushed water is directed back to the irrigation storage basins through our stormwater collection system. As the water returns to the basins, suspended sediment settles out naturally before the water is reused for future irrigation. This approach conserves water resources while still allowing the system to be thoroughly cleaned.

This maintenance work will not affect your drinking water quality or pressure. This is a proactive effort to maintain your irrigation system effectively and is expected to take approximately five months to complete across all affected districts.

Thank you for your cooperation and patience as we work to maintain and improve our irrigation system.

Learn more.