Does Ada, OH need an earthquake retrofit?

USGS's ASCE 7-16 seismic design model - the same standard building codes use - places Ada in Seismic Design Category B: Low seismic hazard. Code requires basic seismic detailing (bracing, connections) but no special structural system restrictions. Nationally, Ada ranks above 54% of the 4,875 cities in this dataset for seismic hazard - the 54th percentile.

How Ada compares

The raw figures: peak ground acceleration 0.094g, short-period spectral response 0.168g, 1-second spectral response 0.063g. Among 254 Ohio cities in this dataset, Ada ranks 12 for seismic hazard, the 96th percentile within the state. About 5,293 people live in Ada, Ohio.

What a retrofit costs in Ada

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

Earthquake insurance for a Ada 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 Ada address.

More on how this number was built

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