Slidell's Seismic Design Category, explained

Under the seismic model IBC and ASCE 7 use for new construction, Slidell is Category B. Low seismic hazard. Code requires basic seismic detailing (bracing, connections) but no special structural system restrictions. That puts Slidell in the 24th percentile nationally for seismic hazard - higher than 24% of the 4,875 US cities USGS was checked against here.

How Slidell compares

USGS's underlying values for Slidell: 0.043g peak ground acceleration, 0.09g at short period, 0.057g at 1 second. Within Louisiana alone, Slidell ranks 18 of 59 cities by seismic hazard - the 71th percentile in-state. Slidell has a population of about 28,440.

Bracing and bolting: the actual cost

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 Louisiana 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 Louisiana.

Insuring against this, not just retrofitting

A Slidell 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 Slidell's figures come from

Slidell'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 Slidell.