Folsom's Seismic Design Category, explained

Under the seismic model IBC and ASCE 7 use for new construction, Folsom is Category C. Moderate seismic hazard. Code adds irregular-building restrictions and requires bracing of some nonstructural components (e.g. tall shelving, water heaters) in addition to structural detailing. That puts Folsom in the 76th percentile nationally for seismic hazard - higher than 76% of the 4,875 US cities USGS was checked against here.

Where Folsom sits in California

USGS's underlying values for Folsom: 0.174g peak ground acceleration, 0.41g at short period, 0.211g at 1 second. Within California alone, Folsom ranks 428 of 429 cities by seismic hazard - the 0th percentile in-state. Folsom has a population of about 88,091.

Retrofit economics for Folsom

Cripple-wall bracing and foundation bolting - the scope California's Earthquake Brace + Bolt (EBB) grant funds - typically runs $3,000-$7,000 nationally. Every qualifying household gets a $3,000 base grant, which brings that down to $0-$4,000 out of pocket; income-eligible households ($89,040/year or under) can get up to $10,000 total, covering the retrofit outright in most cases.

Insuring against this, not just retrofitting

Folsom sits in CEA territory, but CEA earthquake coverage is agent-sold only, never direct - so the real first step for a homeowner here is a standard home-insurance quote, then asking that agent about CEA specifically.

Where Folsom's figures come from

Folsom's Category C and every number above trace to USGS's own ASCE 7-16 Design Maps service - see the methodology guide. Full Brace + Bolt eligibility rules - beyond what this page can check from a ZIP code alone - are in the retrofit cost and grant guide.