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Compare · CO · AZ

ZIP 80202 vs ZIP 85004

Denver, CO compared to Phoenix, AZ on twelve public-records dimensions sourced from EPA, FEMA, USDA, FBI, NCES, and county records. Each cell links to the per-ZIP topic page where the source citation and refresh cadence live.

Last verified 2026-05-13 · methodology

ZIP 80202

Denver, CO

Colorado

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ZIP 85004

Phoenix, AZ

Arizona

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Side by side

Dimensions populate live as ingestion reaches each source. Every row will link to the primary regulator.

Colorado context

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.

Colorado state page →

Arizona context

Radon, wildfire-WUI, water rights

Arizona has Zone 1 radon risk across most of its area per EPA's 1993 map. FEMA NFHL coverage is dense in flood-prone Maricopa + Pima counties; wildfire risk concentrates in Yavapai + Coconino + Cochise. Water-rights and utility-source diversity (CAP allotments vs. local groundwater) varies significantly between metros.

Arizona state page →

Read more on cross-ZIP comparisons

Editorial deep-dives that help when reading two places side-by-side — what each data layer actually proves, and what it doesn't.

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