Boil Water Advisory Issued for San Martin Residents Amid E. coli Contamination
E. coli contamination detected in the water supply has prompted a boil water advisory for some San Martin residents.

San Francisco Oakland San Jose, CA, November 11, 2026 — A boil water advisory has been issued for a portion of San Martin residents following the detection of E. coli contamination in the local water supply. The advisory requires affected residents to boil their water before consumption.
The contamination was identified in the water supply serving some areas of San Martin. In response, public health officials have mandated that all water intended for drinking, cooking, or making ice cubes must be vigorously boiled for at least one minute and then cooled before use. This measure is a standard public health precaution when E. coli is detected, as this bacterium can cause serious illness, particularly in infants, the elderly, and individuals with weakened immune systems.
The specific geographic area affected by the advisory has not been detailed in the provided information. Similarly, the source or cause of the E. coli contamination has not been publicly disclosed. Information regarding the duration of the advisory or when testing will confirm the water’s safety for normal use is also not available at this time.
Officials are monitoring the situation closely and working to resolve the contamination. Further updates regarding the E. coli detection, the affected service area, and the lifting of the boil water advisory will be provided as they become available. Residents are urged to follow the advisory’s instructions until official notification is given that the water is safe for unrestricted use. The contractor responsible for the water system’s maintenance or repair, if any, was not identified.
Story summarized from the original created by KGO-TVWebTeam@email.disney.com(KGO-TV San Francisco) on abc7news.com, see more information here.
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