Massive water line failure leaves majority of Waterbury without service

A catastrophic break in Waterbury, Connecticut’s aging water system left roughly 60% of the city without water over the weekend, triggering an expansive emergency response and forcing school closures, restaurant shutdowns, and bottled-water distribution across the community. 

According to CT Public, city officials said the crisis began late Friday night when a 10-inch cast-iron line from 1901 failed, undermining a nearby 42-inch transmission main installed in the 1970s. The larger main ruptured explosively, sending pavement airborne, shattering windows and draining the system for more than 12 hours. With valves too fragile to isolate the break, most of Waterbury and parts of Wolcott and Watertown lost pressure entirely.

By Sunday afternoon, service had been restored to Waterbury’s hospitals and western neighborhoods, but large portions of the system remained dry or under boil-water advisories, CT Public reported. Fire hydrants were unusable, prompting assistance from neighboring departments. The National Guard and state emergency agencies mobilized water tankers and bottle distribution sites at Municipal Stadium and Crosby High School.

Officials said the timing compounded the impact: the city’s second high-pressure transmission main—designed to serve as a backup—was temporarily offline for lining and pressure testing. The rupture underscored long-standing challenges within Waterbury’s aging network, where century-old pipes and deteriorated valves complicate isolation and repair.

Waterbury is in the midst of a $30 million, multi-year modernization program, but Mayor Paul Pernerewski noted that extensive upgrades must occur in stages to avoid shutting down the system entirely. No timeline has been provided for full restoration as crews continue assessing damage.

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