Bartlett's Seismic Design Category, explained

Bartlett carries Seismic Design Category B under USGS's ASCE 7-16 model. Low seismic hazard. Code requires basic seismic detailing (bracing, connections) but no special structural system restrictions. Rank it against the rest of the country and Bartlett sits at the 42th percentile for seismic hazard among 4,875 US cities.

Where Bartlett sits in Illinois

The raw figures: peak ground acceleration 0.066g, short-period spectral response 0.128g, 1-second spectral response 0.063g. Among 330 Illinois cities in this dataset, Bartlett ranks 122 for seismic hazard, the 63th percentile within the state. About 40,718 people live in Bartlett, Illinois.

Bracing and bolting: the actual cost

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

Earthquake insurance for a Bartlett home

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 Bartlett address.

More on how this number was built

The methodology guide covers exactly how USGS's public design-maps API produced Bartlett'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.