Metro area air quality · 2025
Hailey, ID
Median AQI 22 (Good). 99.4% of monitored days rated Good across this metro's EPA monitoring network.
- 22
- Median AQI
- 99.4%
- Good-air days
- 0
- Unhealthy days
- 98%
- Cleaner than US metros
Aggregated from EPA Air Quality System (2025), 166 monitored days. EPA AQS →
The verdict
The Hailey, ID metro runs good on the EPA scale, among the cleanest 10% of US metros, a median AQI of 22 with 99.4% of 166 monitored days in the Good band.
- 22
- median AQI · Good
- 99.4%
- days rated Good
- 98%
- cleaner than US metros
- 56
- worst single reading
No day crossed into the Unhealthy tier across the metro's monitors in 2025.
Insights: Hailey, ID metro. Aggregated EPA AQS monitors across this Core-Based Statistical Area logged a median Air Quality Index of 22 over 166 measured days in 2025, which corresponds to a Good band and a Excellent metro-wide health grade. The monitored-day split lands at 165 Good days (99%), 1 Moderate (1%), and 0 Unhealthy-for-Sensitive-Groups (0%). The 90th-percentile AQI finished at 33 while the highest single-day reading hit 56 (Moderate). Metro residents averaged roughly 29.8 clean-air days per 30-day window across the reporting year.
Across the 2020–2025 trend window, good days shifted by -158 and the median AQI moved +3 points, which classifies the multi-year trajectory as improving. 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 Bend-Redmond, OR (93.4% good, AQI 22); Ellensburg, WA (84.8% good, AQI 22); Emporia, KS (88.9% good, AQI 22).
Air Quality Summary
Median AQI
22
Good
Good Days
99.4%
165 of 166 days
Max AQI
56
Moderate
Health Grade
Excellent
90th pct: 33
AQI Day Breakdown (2025)
Distribution of 166 monitored days across EPA AQI categories.
Good
165
99%
Moderate
1
1%
USG
0
0%
Unhealthy
0
0%
Very Unhealthy
0
0%
Hazardous
0
0%
Health Impact Assessment
The Hailey, ID metro area's air quality is rated Excellent based on 99.4% 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 Hailey, ID metro compare?
How Hailey, ID compares
5-Year Air Quality Trend
Air quality is improving in the Hailey, ID metro. Best year: 2023 (323 good days).
| Year | Good | Moderate | Unhealthy | Median AQI | Max AQI |
|---|---|---|---|---|---|
| 2020 | 323 | 34 | 2 | 19 | 172 |
| 2021 | 288 | 52 | 0 | 23 | 144 |
| 2022 | 321 | 29 | 3 | 23 | 182 |
| 2023 | 323 | 7 | 0 | 19 | 63 |
| 2024 | 310 | 43 | 1 | 19 | 220 |
| 2025 | 165 | 1 | 0 | 22 | 56 |
Metros with Similar Air Quality
Metro areas across the US with a similar median AQI to Hailey, ID.
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Worst Air Quality
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All Metro Areas
Annual AQI by CBSA for every monitored U.S. metro area.
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Air Quality Guides
Frequently Asked Questions
What is the air quality in the Hailey, ID metro area? ▼
How many unhealthy air days does Hailey, ID have? ▼
Is air quality in Hailey, ID getting better or worse? ▼
What does AQI 22 mean for health? ▼
What is the 90th percentile AQI for Hailey, ID? ▼
How does Hailey, ID 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.