Chico Water Mains to Undergo Upgrades Starting October

The city will begin installing 3,200 feet of new piping to improve water system reliability for households in central Chico.

Updated on Oct. 21, 2026 in Home Renovation

Screen-print poster illustration of iron pipes near an excavated trench, representing municipal water infrastructure upgrades in a community. — California Water Service will launch a water main replacement project on October 26, 2026, to modernize 3,200 feet of aging infrastructure in Chico. AI Illustration. Upload story photo >

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California Water Service will begin a new water main installation project in Chico starting the week of October 26, 2026. This initiative upgrades 3,200 feet of infrastructure on Vallombrosa Avenue, Mangrove Avenue, and Memorial Way to improve reliability.

Why it matters

These upgrades are designed to enhance fire protection and reduce the risk of future water service disruptions in central Chico. By replacing aging mains, the utility aims to bolster the long-term integrity of the local water system for area residents.

The utility is installing 7,500 feet of new piping, including 3,200 feet of 8-inch and 6-inch mains on Vallombrosa Avenue, Mangrove Avenue, and Memorial Way. This adds to the existing 4,300 feet of upgrades currently being finalized on Madrone Avenue and Cooks Way.

The players

California Water Service

A regulated utility provider responsible for water infrastructure maintenance and delivery across multiple California service areas.

The details

The project involves replacing aging, outdated water mains with new 12-inch, 8-inch, and 6-inch lines. This technical upgrade helps maintain consistent water pressure and flow, which is essential for both daily household use and fire suppression capabilities. Upgrading these materials minimizes the likelihood of subterranean leaks that could otherwise lead to emergency street closures.

October 26, 2026: The new water main installation project is scheduled to begin.
January 2027: The construction project is expected to reach completion.

The Home Front

Modernizing local water distribution systems is a critical strategy for mitigating the rising maintenance costs associated with aging utility infrastructure. These upgrades align with broader municipal efforts to ensure that core housing services meet current reliability and safety standards.

If you live along Vallombrosa Avenue, Mangrove Avenue, or Memorial Way, prepare for potential temporary street parking or traffic changes during construction. Residents should monitor their water service for any planned, short-term interruptions communicated by the utility throughout the project window.

The takeaway

Proactive utility upgrades help ensure the reliability of your home water connection. Keep track of local notices from California Water Service if you reside near the construction corridor to manage any brief service impacts.