City officials on Tuesday warned households across large sections of north and south St. Louis to boil tap water after a pump failure at one of the city’s treatment plants knocked down distribution pressure. The precautionary advisory covers roughly 19 neighborhoods and applies to drinking, cooking and ice-making until lab tests clear the water. Crews worked to stabilize pressure while teams collected samples for analysis, and officials stressed that the move is precautionary while they wait for test results.
Pump Failure at Chain of Rocks Plant
The Water Division traced the low pressure to a pump failure at the Chain of Rocks water treatment plant, which triggered the advisory, according to KSDK. Utility crews moved quickly, cutting flows to help stabilize the distribution system while technicians inspected the failed pump and related equipment. The division said it issued the precautionary boil order to reduce risk to customers until normal pressure could be restored.
Who Is Affected and What Residents Should Do
The advisory lists neighborhoods across north and south St. Louis - including Hi-Pointe, Clayton-Tamm, The Hill, Tower Grove South, South Grand and others - and applies to a 19-neighborhood area identified by the city. The Water Division’s guidance instructs residents to boil tap water vigorously for three minutes before using it for drinking or cooking, to throw out any existing ice and avoid using automatic ice makers, and to disinfect dishes and food-contact surfaces by immersing them for at least one minute in a bleach solution made with one teaspoon of unscented household bleach per gallon of water. Those precautions, along with maps of the affected areas, are posted on the City of St. Louis Water Division website.
Tests Pending, No Contamination Detected So Far
Officials said samples had been collected and that test results were expected within 24 hours, with the boil advisory set to be lifted only after a lab confirms the water is clear, according to KSDK. The Water Division told reporters it had not detected contamination in the supply but imposed the precaution because low pressure can allow contaminants to enter distribution lines during service work. The division said it will post updates and a detailed map of affected areas once additional information is available.
Context: Strain on an Aging System
The advisory comes as the city debates a multi-year water-rate plan and a capital improvement program aimed at tackling aging infrastructure and cutting down on service interruptions, according to a spring Water Division release. Officials have said the proposed rate board bill would help fund repairs needed to prevent breakdowns at treatment and pumping facilities in the future. Residents with questions can call the Water Division or sign up for NotifySTL alerts through the division’s website for the latest updates.
