Hazel Crest, IL: what USGS's seismic model says

Under the seismic model IBC and ASCE 7 use for new construction, Hazel Crest is Category B. Low seismic hazard. Code requires basic seismic detailing (bracing, connections) but no special structural system restrictions. Nationally, Hazel Crest ranks above 39% of the 4,875 cities in this dataset for seismic hazard - the 39th percentile.

How Hazel Crest compares

The raw figures: peak ground acceleration 0.062g, short-period spectral response 0.125g, 1-second spectral response 0.067g. Among 330 Illinois cities in this dataset, Hazel Crest ranks 208 for seismic hazard, the 37th percentile within the state. About 13,036 people live in Hazel Crest, Illinois.

Retrofit economics for Hazel Crest

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.

What this means for insurance

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 Hazel Crest address.

More on how this number was built

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