Does Quincy, IL need an earthquake retrofit?

Quincy carries Seismic Design Category C under USGS's ASCE 7-16 model. 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. Rank it against the rest of the country and Quincy sits at the 67th percentile for seismic hazard among 4,875 US cities.

How Quincy compares

USGS's underlying values for Quincy: 0.063g peak ground acceleration, 0.134g at short period, 0.083g at 1 second. Within Illinois alone, Quincy ranks 68 of 330 cities by seismic hazard - the 80th percentile in-state. Quincy has a population of about 38,786.

What a retrofit costs in Quincy

A full earthquake retrofit typically runs $5,000-$10,000 nationally (around $7,000 typical), driven mainly by house size and foundation type, not by Illinois specifically. California's Earthquake Brace + Bolt grant, which covers a large share of this cost, is a California-only program and does not apply in Illinois.

Earthquake insurance for a Quincy home

A Quincy homeowner cannot buy a standalone earthquake policy in most cases - it is added to an existing homeowners policy as an endorsement, so the place to start is a regular home-insurance quote.

Where Quincy's figures come from

Quincy's Category C and every number above trace to USGS's own ASCE 7-16 Design Maps service - see the methodology guide. See the category explainer for what Category C does and doesn't tell you about Quincy.