State · DC
District of Columbia — neighborhood data
ZIP-level federated summaries available in District of Columbia today. Full state coverage lands as the data-ingestion layer keeps rolling out.
Last verified 2026-09-24
District of Columbia top concern
Lead service lines (DC Water), flood
DC Water has documented elevated lead service line replacement obligations under LCRR. The Anacostia + Potomac waterfronts have FEMA AE zones; FBI UCR jurisdictional reporting for DC differs from state UCR aggregations.
See methodology for source citations + refresh cadence per dataset.
Verdict
Across the 2 District of Columbia ZIPs zipradar carries, 2 of the 12 dimensions carry measured values today: radon — all 2 in EPA Zone 3 (lowest); air quality — median day Good across 2 with 2025 county data. The rest are per-ZIP lookups that populate as ingestion reaches each source — open a ZIP below rather than reading a state average.
2 ZIP codes live
Browse District of Columbia ZIPs by topic
Pick a topic to dive deeper across District of Columbia 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 Air Quality System (AQS), annual county summary
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
District of Columbia counties
County-level rollups for property tax, deeds, and EPA radon zones.
Browse District of Columbia counties →Frequently asked questions
How many ZIP codes does zipradar cover in District of Columbia?
2 ZIP codes are live in District of Columbia today, and coverage keeps expanding toward the full 41,000+ US ZIP set. Each ZIP page federates 12 dimensions: water, flood, wildfire, crime, schools, radon, air, lead, property tax, deeds, zoning, and sex-offender registry.
What is the top neighborhood-data concern in District of Columbia?
Lead service lines (DC Water), flood. DC Water has documented elevated lead service line replacement obligations under LCRR. The Anacostia + Potomac waterfronts have FEMA AE zones; FBI UCR jurisdictional reporting for DC differs from state UCR aggregations.
What data sources does zipradar use for District of Columbia?
EPA SDWIS (drinking water), FEMA NFHL (flood), FBI UCR + Crime Data Explorer (crime), NCES CCD (schools), USFS (wildfire risk), EPA Map of Radon Zones, plus District of Columbia county assessors and recorders for property tax + deeds. See /methodology for what's covered per source and refresh cadence.
Where can I see county-level data for District of Columbia?
District of Columbia county dashboards roll up property tax (assessor), deeds (recorder), and EPA radon zones at the county tier. Browse /county/dc/ for the full county index — coverage matches ZIP rollout schedule.
District of Columbia-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.