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Compare · MO · IL

ZIP 63101 vs ZIP 60601

St. Louis, MO compared to Chicago, IL 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 63101

St. Louis, MO

Missouri

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ZIP 60601

Chicago, IL

Illinois

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Side by side

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

Missouri context

Radon, flooding (Missouri/Mississippi), tornadoes

Missouri has Zone 1 radon across most of the state. Major river FEMA AE zones along the Missouri + Mississippi affect St. Louis, Hannibal, Cape Girardeau. Tornado risk peaks April-May.

Missouri state page →

Illinois context

Lead service lines, flooding (Mississippi/Illinois)

Illinois has the highest LCRR lead-service-line replacement obligations in the US (Chicago alone >400,000 LSLs). FEMA AE coverage extends along the Mississippi, Illinois, and Rock rivers. EPA SDWIS shows urban vs. downstate disparity.

Illinois 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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