Round Lake Park, IL: what USGS's seismic model says

Round Lake Park carries Seismic Design Category B under USGS's ASCE 7-16 model. Low seismic hazard. Code requires basic seismic detailing (bracing, connections) but no special structural system restrictions. Rank it against the rest of the country and Round Lake Park sits at the 31th percentile for seismic hazard among 4,875 US cities.

Round Lake Park by the numbers

USGS's underlying values for Round Lake Park: 0.052g peak ground acceleration, 0.104g at short period, 0.057g at 1 second. Within Illinois alone, Round Lake Park ranks 303 of 330 cities by seismic hazard - the 8th percentile in-state. Round Lake Park has a population of about 7,836.

What a retrofit costs in Round Lake Park

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.

Insuring against this, not just retrofitting

A Round Lake Park 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 Round Lake Park's figures come from

Round Lake Park's Category B 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 B does and doesn't tell you about Round Lake Park.