Bridgeport, CT: what USGS's seismic model says

Under the seismic model IBC and ASCE 7 use for new construction, Bridgeport is Category B. Low seismic hazard. Code requires basic seismic detailing (bracing, connections) but no special structural system restrictions. That puts Bridgeport in the 59th percentile nationally for seismic hazard - higher than 59% of the 4,875 US cities USGS was checked against here.

How Bridgeport compares

The raw figures: peak ground acceleration 0.12g, short-period spectral response 0.211g, 1-second spectral response 0.054g. Among 21 Connecticut cities in this dataset, Bridgeport ranks 4 for seismic hazard, the 85th percentile within the state. About 151,599 people live in Bridgeport, Connecticut.

Retrofit economics for Bridgeport

Outside California, no state-level retrofit grant equivalent to Brace + Bolt could be found for Connecticut. A typical retrofit still runs $5,000-$10,000 nationally, about $7,000 for a common single-family job.

Insuring against this, not just retrofitting

Outside California, earthquake coverage is typically sold as an endorsement added to a standard homeowners policy, not a separate product - worth asking about directly when getting a home-insurance quote for a Bridgeport address.

More on how this number was built

The methodology guide covers exactly how USGS's public design-maps API produced Bridgeport's numbers. The guide to what a Seismic Design Category actually means covers why a category is never a substitute for an engineer's assessment of one specific house.