Sex offender registry · Iowa
Sex offender registry in Iowa
Sex offender registry (NSOPW (federal deep-link)) data for ZIP codes in Iowa. Pick a ZIP below to dive into the sex offender registry summary.
Last verified 2026-05-13 · methodology
What lands here
Pages provide a clickable deep-link to search NSOPW by ZIP or address. zipradar does NOT mirror, cache, or republish any registry records — NSOPW is the sole source of truth.
Source & refresh
NSOPW (federal deep-link). Refreshed real-time (registry is the canonical source; zipradar doesn't mirror). Primary source →
Iowa top concern
Radon Zone 1, agricultural water nitrates
Iowa is one of the highest-radon states in the US — uniformly Zone 1. Agricultural runoff drives EPA SDWIS nitrate violations in small rural systems and even Des Moines Water Works. Tornadoes peak April-June.
See Iowa state page for the full state-level rollup across all 12 dimensions.
Read more on sex offender registry
Editorial deep-dives explaining the source data, its limits, and how to read it.