State · SD
South Dakota — neighborhood data
ZIP-level federated summaries available in South Dakota today. Full state coverage lands as the data-ingestion layer rolls out through Week 2.
Last verified 2026-04-24
South Dakota top concern
Radon Zone 1, agricultural water, tornadoes
South Dakota is uniformly Zone 1 radon. Agricultural runoff drives EPA SDWIS nitrate compliance pressure in small rural systems. Tornado risk peaks April-June.
See methodology for source citations + refresh cadence per dataset.
3 ZIP codes live
Browse South Dakota ZIPs by topic
Pick a topic to dive deeper across South Dakota addresses. Each topic page explains the source, refresh cadence, and limitations.
EPA SDWIS
Water quality
FEMA NFHL
Flood zone
USDA Forest Service
Wildfire risk
EPA AirNow
Air quality
FBI UCR
Crime
NCES Common Core of Data
Schools
EPA Radon Zones
Radon
EPA LCRR + RTI National Lead Pipe Map
Lead pipes
County assessors
Property tax
County recorders
Deed activity
Municipal planning departments
Zoning
NSOPW (federal deep-link)
Sex offender registry
South Dakota counties
County-level rollups for property tax, deeds, and EPA radon zones.
Browse South Dakota counties →South Dakota-specific data sources
zipradar federates state-level data from EPA SDWIS (drinking water), FEMA NFHL (flood), FBI UCR (crime), NCES CCD (schools), plus county assessors and recorders where published. See the methodology page for the full source list and refresh cadence.