Farmington's Seismic Design Category, explained

Farmington carries Seismic Design Category D under USGS's ASCE 7-16 model. High seismic hazard - this is the category most of coastal California, the Pacific Northwest, and other active fault regions fall into. Code mandates significant seismic detailing and restricts irregular structural configurations. This is the category the Brace + Bolt scope (cripple-wall bracing, foundation bolting) is built for. Nationally, Farmington ranks above 85% of the 4,875 cities in this dataset for seismic hazard - the 85th percentile.

How Farmington compares

The raw figures: peak ground acceleration 0.321g, short-period spectral response 0.578g, 1-second spectral response 0.215g. Among 135 Missouri cities in this dataset, Farmington ranks 10 for seismic hazard, the 93th percentile within the state. About 19,165 people live in Farmington, Missouri.

Retrofit economics for Farmington

Outside California, no state-level retrofit grant equivalent to Brace + Bolt could be found for Missouri. 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 Farmington address.

More on how this number was built

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