Park Ridge, IL: what USGS's seismic model says

USGS's ASCE 7-16 seismic design model - the same standard building codes use - places Park Ridge in Seismic Design Category B: Low seismic hazard. Code requires basic seismic detailing (bracing, connections) but no special structural system restrictions. That puts Park Ridge in the 36th percentile nationally for seismic hazard - higher than 36% of the 4,875 US cities USGS was checked against here.

Park Ridge by the numbers

The raw figures: peak ground acceleration 0.059g, short-period spectral response 0.116g, 1-second spectral response 0.062g. Among 330 Illinois cities in this dataset, Park Ridge ranks 250 for seismic hazard, the 24th percentile within the state. About 38,445 people live in Park Ridge, Illinois.

What a retrofit costs in Park Ridge

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 Park Ridge 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 Park Ridge address.

More on how this number was built

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