Mukilteo, WA: what USGS's seismic model says

Under the seismic model IBC and ASCE 7 use for new construction, Mukilteo is Category D. High seismic hazard - this is the category most of coastal California, the Pacific Northwest, and other active fault regions fall into. Code mandates significant seismic detailing and restricts irregular structural configurations. This is the category the Brace + Bolt scope (cripple-wall bracing, foundation bolting) is built for. Rank it against the rest of the country and Mukilteo sits at the 93th percentile for seismic hazard among 4,875 US cities.

Mukilteo by the numbers

USGS's underlying values for Mukilteo: 0.606g peak ground acceleration, 1.402g at short period, 0.5g at 1 second. Within Washington alone, Mukilteo ranks 16 of 125 cities by seismic hazard - the 88th percentile in-state. Mukilteo has a population of about 21,299.

Retrofit economics for Mukilteo

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 Washington 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 Washington.

Earthquake insurance for a Mukilteo home

A Mukilteo 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 Mukilteo's figures come from

Mukilteo's Category D 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 D does and doesn't tell you about Mukilteo.