What is the current outdoor AQI?
A timestamped AirNow reporting-area observation, kept separate from long-term ranking because it can change within hours.
Understand AirNow data →Validated releaseUpdated 2026-10-15See source status
U.S. home environmental intelligence
What do public data say about the environment around your home?
HomeNHealthy joins federal air, drinking-water, climate and housing datasets into clear city profiles. Every answer includes its geography, date, source and limitation.
The joined database
Facts first. The composite score second.
Primary agencies publish excellent individual datasets. HomeNHealthy adds value by joining them into one dated, readable record for each city.
City profiles75stable URLs
Current air75/75AirNow areas
Climate normals75/75NOAA stations
Housing profiles70/75Census places
Direct answers by place
One profile, four different kinds of evidence.
How many water systems report a current health-based violation?
EPA ECHO state context, with the scope stated plainly. A city page never pretends that a state equals a local utility.
Understand EPA water data →What are the local moisture conditions?
NOAA climate normals provide warm-season temperature and precipitation context—not a claim that mold exists in a home.
Understand the climate proxy →How old is the local housing stock?
Census age bins show the share built before 1980 and before 1940, alongside the median construction year.
Understand housing-age data →Experimental index
Current city ranking
The v2 index uses only slow-moving, validated fields. Current AQI is intentionally excluded. If a required source fails its quality gate, affected scores are withheld rather than treated as zero.
| Rank | City | Score | AQI now | Water systems without current health violation | Moisture pressure | Housing pre-1980 |
|---|---|---|---|---|---|---|
| #1 | Anchorage, AK | 75.1 | 23 | 87.5% | 16.4 | 44.5% |
| #2 | Reno, NV | 74.8 | 42 | 87.7% | 26.1 | 37.4% |
| #3 | Seattle, WA | 73.9 | 54 | 99.2% | 24.4 | 52.8% |
| #4 | Fargo, ND | 73.8 | 33 | 99.4% | 43.4 | 37.1% |
| #5 | Las Vegas, NV | 73.1 | 32 | 87.7% | 48.6 | 22.8% |
| #6 | Colorado Springs, CO | 72.8 | 31 | 94.5% | 38.3 | 39.4% |
| #7 | Billings, MT | 72.6 | 39 | 97.2% | 29.3 | 50.3% |
| #8 | Sioux Falls, SD | 71.0 | 34 | 97.3% | 52.3 | 35.3% |
Built for reuse
Download, audit and cite the underlying release.
Use the CSV for analysis, the JSON for complete field-level provenance, or the copy-ready citation. The published schema explains exactly what each field means and does not mean.
Open the data centerSuggested citation
HomeNHealthy. “U.S. Home Environmental Profiles.” Methodology v2.0, updated 2026-10-15. https://homenhealthy.com/data-download/