County · CO
Boulder County, CO
ZIP-level federated summaries inside Boulder County, Colorado. zipradar pulls property tax (county assessor), deeds (county recorder), water quality (EPA SDWIS), flood zones (FEMA NFHL), schools (NCES CCD), and crime (FBI UCR) at the county and ZIP level.
Last verified 2026-06-10 · methodology
1 ZIP code live in Boulder County
Browse Boulder County by topic
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
Colorado top concern
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.
See Colorado state page for the full state-level rollup, plus all Colorado counties.
Frequently asked questions
How many ZIP codes does zipradar cover in Boulder County, CO?
1 ZIP code is live in Boulder County, Colorado today. Each ZIP page federates property tax (Boulder County assessor), deeds (Boulder County recorder), drinking water (EPA SDWIS), flood (FEMA NFHL), schools (NCES CCD), and crime (FBI UCR).
What data sources does zipradar use for Boulder County County?
Property tax + assessed values come from the Boulder County County Assessor's office. Deed activity comes from the Boulder County County Recorder. Zoning is sourced from county planning records. State-level overlays: EPA SDWIS (water), FEMA NFHL (flood), FBI UCR (crime), NCES CCD (schools), EPA Map of Radon Zones. Refresh cadence varies — see /methodology.
How are property tax and deeds different in Boulder County?
Property tax records are maintained by the Boulder County County Assessor (annual cycle, typically). Deeds are recorded by the Boulder County County Recorder (real-time on transaction). zipradar surfaces both at the ZIP level so you can spot assessment-vs-sale-price gaps and recent deed activity. See /learn for the full office-distinction explainer.
Does Boulder County have flood or wildfire risk?
Flood risk is mapped at the ZIP and parcel level via FEMA NFHL (National Flood Hazard Layer). Wildfire risk uses USFS Wildfire Risk to Communities data. Browse the per-ZIP pages above for Boulder County-specific exposure scores — each cites the FEMA flood-zone code (A, AE, X, etc.) or USFS risk percentile.
Read more on county-level data
How property tax, deeds, zoning, and schools work at the county level — the office distinctions, what data lags, and what each record actually means.
FBI UCR and NIBRS — what crime statistics actually show (and don't)
The FBI's Uniform Crime Reporting (UCR) program and its successor NIBRS aggregate crime data from local agencies. Plain-English guide to what gets reported, what doesn't, and how to read the numbers.
Lead and Copper Rule 2024 — the federal lead-pipe inventory mandate
The 2024 Lead and Copper Rule Revisions (LCRR) require every US community water system to inventory and report lead service lines. Plain-English guide.
Property tax millage — what 'mill' means and how your bill is computed
Plain-English guide to property tax millage rates, assessment ratios, and homestead exemptions. How county assessors compute your annual property tax bill.
School district boundaries — how to confirm yours and why it matters
How school district boundaries work, where to find them, and why the same street can split between two districts.
Deed records — what they show and what they don't
Plain-English guide to county deed records: what gets filed, how to look up a property's history, and why zipradar aggregates only counts (never owner names).
Zoning codes — what R-1, C-2, M-1, MU mean and why your house is one
Plain-English guide to common US zoning codes: R-1 / R-2 / C-1 / C-2 / M-1 / MU. Why zoning matters for your home, your neighbors, and what you can build.