A water main break in Mountain View, Calif., on April 24, 2026, disrupted service in the Cuesta Park neighborhood. Residents in at least 67 households are now under a boil-water order after contamination was detected in parts of the system, city officials said. (City of Mountain View via Bay City News)

Mountain View residents who have had their water shut off since Friday will have to wait until at least mid-week to be able to use water from their tap for anything other than toilet flushing, the city said Sunday.  

About two thirds of the residents in Mountain View’s Cuesta Park neighborhood had their water restored on Sunday morning for toilet use only and will have to contend with that until city crews can render the water potable.  

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Katy St. Clair got her start in journalism by working in the classifieds department at the East Bay Express during the height of alt weeklies, then sweet talked her way into becoming staff writer, submissions editor, and music editor. She has been a columnist in the East Bay Express, SF Weekly, and the San Francisco Examiner. Starting in 2015, she begrudgingly scaled the inverted pyramid at dailies such as the Vallejo Times-Herald, The Vacaville Reporter, and the Daily Republic. She has her own independent news site and blog that covers the delightfully dysfunctional town of Vallejo, California, where she also collaborates with the investigative team at Open Vallejo. A passionate advocate for people with developmental disabilities, she serves on both the Board of the Arc of Solano and the Arc of California. She lives in Vallejo.