Metro area air quality · 2025
Cedar City, UT
Median AQI 46 (Good). 70.0% of monitored days rated Good across this metro's EPA monitoring network.
- 46
- Median AQI
- 70.0%
- Good-air days
- 0
- Unhealthy days
- 44%
- Cleaner than US metros
Aggregated from EPA Air Quality System (2025), 303 monitored days. EPA AQS →
The verdict
The Cedar City, UT metro runs good on the EPA scale, more polluted than the median US metro, a median AQI of 46 with 70.0% of 303 monitored days in the Good band.
- 46
- median AQI · Good
- 70.0%
- days rated Good
- 44%
- cleaner than US metros
- 105
- worst single reading
No day crossed into the Unhealthy tier across the metro's monitors in 2025.
Insights: Cedar City, UT metro. Aggregated EPA AQS monitors across this Core-Based Statistical Area logged a median Air Quality Index of 46 over 303 measured days in 2025, which corresponds to a Good band and a Moderate metro-wide health grade. The monitored-day split lands at 212 Good days (70%), 90 Moderate (30%), and 1 Unhealthy-for-Sensitive-Groups (0%). The 90th-percentile AQI finished at 64 while the highest single-day reading hit 105 (USG). Metro residents averaged roughly 21.0 clean-air days per 30-day window across the reporting year.
Across the 2020–2025 trend window, good days shifted by -100 and the median AQI moved +5 points, which classifies the multi-year trajectory as worsening. The metro avoided any Unhealthy-tier days entirely, an outcome that typically reflects favorable wind patterns, lower industrial density, or effective regional emission controls. Metros with comparable AQI profiles include Albany, GA (55.6% good, AQI 46); Asheville, NC (68.1% good, AQI 46); Des Moines-West Des Moines, IA (58.5% good, AQI 46).
Air Quality Summary
Median AQI
46
Good
Good Days
70.0%
212 of 303 days
Max AQI
105
USG
Health Grade
Moderate
90th pct: 64
AQI Day Breakdown (2025)
Distribution of 303 monitored days across EPA AQI categories.
Good
212
70%
Moderate
90
30%
USG
1
0%
Unhealthy
0
0%
Very Unhealthy
0
0%
Hazardous
0
0%
Health Impact Assessment
The Cedar City, UT metro area's air quality is rated Moderate based on 70.0% good air days. No unhealthy air days were recorded in 2025.
Air quality is generally acceptable. Unusually sensitive people should monitor real-time conditions at AirNow.gov during high-pollution events.
How does the Cedar City, UT metro compare?
How Cedar City, UT compares
5-Year Air Quality Trend
Air quality is worsening in the Cedar City, UT metro. Best year: 2020 (312 good days).
| Year | Good | Moderate | Unhealthy | Median AQI | Max AQI |
|---|---|---|---|---|---|
| 2020 | 312 | 54 | 0 | 41 | 88 |
| 2021 | 286 | 75 | 1 | 40 | 176 |
| 2022 | 309 | 56 | 0 | 42 | 80 |
| 2023 | 309 | 55 | 0 | 42 | 103 |
| 2024 | 303 | 62 | 0 | 43 | 100 |
| 2025 | 212 | 90 | 0 | 46 | 105 |
Metros with Similar Air Quality
Metro areas across the US with a similar median AQI to Cedar City, UT.
More Air Quality Data
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Cleanest Metro Areas
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Worst Air Quality
Counties and metros with the most unhealthy air days.
All Metro Areas
Annual AQI by CBSA for every monitored U.S. metro area.
Best and Worst City Air
What drives urban air quality and how metro areas compare.
Air Quality Guides
Frequently Asked Questions
What is the air quality in the Cedar City, UT metro area? ▼
How many unhealthy air days does Cedar City, UT have? ▼
Is air quality in Cedar City, UT getting better or worse? ▼
What does AQI 46 mean for health? ▼
What is the 90th percentile AQI for Cedar City, UT? ▼
How does Cedar City, UT compare to other metro areas? ▼
Data Sources
Primary Source: U.S. Environmental Protection Agency (EPA), Air Quality System (AQS), Annual AQI by CBSA dataset, 2020–2025. See our methodology for how AQI, median, and coverage figures are computed.
Read our methodology , how this data is sourced, computed, and verified.
Source: U.S. EPA Air Quality System (AQS) Annual AQI by CBSA summary files (metro-level) · 2020–2025
Every figure on PlainAir is rendered directly from EPA AQS air-quality monitoring data, no number is typed in by an editor. This page draws directly on EPA AQS air-quality monitoring data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.