South River's Seismic Design Category, explained

South River 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. That puts South River in the 62th percentile nationally for seismic hazard - higher than 62% of the 4,875 US cities USGS was checked against here.

How South River compares

USGS's underlying values for South River: 0.156g peak ground acceleration, 0.258g at short period, 0.056g at 1 second. Within New Jersey alone, South River ranks 117 of 194 cities by seismic hazard - the 40th percentile in-state. South River has a population of about 16,392.

What a retrofit costs in South River

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 New Jersey 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 New Jersey.

Insuring against this, not just retrofitting

A South River 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 South River's figures come from

South River'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 South River.