Flood zone · Colorado
Flood zone in Colorado
Flood zone (FEMA NFHL) data for ZIP codes in Colorado. Pick a ZIP below to dive into the flood zone summary.
Last verified 2026-06-15 · methodology
What lands here
Pages show the flood zone code, what it means in plain English (1% annual chance zone, 0.2% annual chance zone, or outside mapped hazard), and the base flood elevation where assigned.
Source & refresh
FEMA NFHL. Refreshed quarterly loma updates. Primary source →
Colorado top concern
Radon Zone 1, wildfire on the Front Range
Colorado is one of the most uniformly Zone 1 radon states in the US. WUI wildfire risk concentrates along the Front Range from Boulder to Colorado Springs. Drinking water sourcing splits between Front Range water districts and Western Slope reclamation projects, each with distinct EPA SDWIS compliance histories.
See Colorado state page for the full state-level rollup across all 12 dimensions.
Read more on flood zone
Editorial deep-dives explaining the source data, its limits, and how to read it.
Flood zones explained — what AE, X, and VE actually mean
Plain-English guide to FEMA flood-zone codes (A, AE, AH, V, VE, X, X-shaded). What the 1% and 0.2% annual-chance zones mean for your property and your insurance.
Wildfire Hazard Potential — what the USFS scale means and how to defend your home
Plain-English guide to the USDA Forest Service's Wildfire Hazard Potential 1–5 scale, how to read your community's risk, and concrete home-defense measures.
Wildfire insurance in 2026 — why premiums spiked and what to do
California, Oregon, Colorado, and other Western states have seen wildfire insurance premiums double or homeowners drop entirely. Plain-English guide to the 2026 market.
FEMA flood zones — AE vs. X vs. VE in plain English
FEMA's National Flood Hazard Layer maps every US property's flood-zone designation. Here's what AE, X, VE, and AO actually mean for your insurance bill.
11 Colorado ZIPs
ZIP 80202
Denver, CO
Flood zone →
ZIP 80206
Denver (Cherry Creek), CO
Flood zone →
ZIP 80424
Breckenridge, CO
Flood zone →
ZIP 80302
Boulder, CO
Flood zone →
ZIP 81611
Aspen, CO
Flood zone →
ZIP 80525
Fort Collins, CO
Flood zone →
ZIP 81301
Durango, CO
Flood zone →
ZIP 80205
Denver (Five Points), CO
Flood zone →
ZIP 80113
Englewood (CO), CO
Flood zone →
ZIP 80020
Broomfield (CO), CO
Flood zone →
ZIP 81611
Aspen (CO), CO
Flood zone →