Metro area air quality · 2025
Coeur d'Alene, ID
Median AQI 31 (Good). 77.8% of monitored days rated Good across this metro's EPA monitoring network.
- 31
- Median AQI
- 77.8%
- Good-air days
- 0
- Unhealthy days
- 63%
- Cleaner than US metros
Coeur d'Alene, ID posted a 2025 median AQI of 31 (Good) with 77.8% Good days
According to the U.S. EPA Air Quality System, the Coeur d'Alene, ID CBSA recorded a median AQI of 31 across 352 monitored days in 2025, with 77.8% rated Good and 0 unhealthy or worse. This is an annual metro comparison, not a live advisory.
Data source EPA Air Quality System (AQS)
- Cleaner than US metros
- The Coeur d'Alene, ID CBSA's 77.8% Good-day share places it cleaner than 63% of US metros in 2025.
- Closest median-AQI peer
- Athens, OH (83.4% Good, median AQI 31) is the closest nationwide median-AQI peer to Coeur d'Alene, ID.
- 2020–2025 Good-day shift
- Coeur d'Alene, ID's Good-day share moved -4.2 points from 2020 to 2025 (median AQI +5).
- Median AQI
- Median AQI: 31
Aggregated from EPA Air Quality System (2025), 352 monitored days. EPA AQS →
The verdict
Coeur d'Alene, ID's median AQI 31 is in the lower (cleaner) CBSA tercile on this site. On the EPA scale the metro runs good, cleaner than the median US metro, with a median AQI of 31 and 77.8% of 352 monitored days in the Good band.
- 31
- median AQI · Good
- 77.8%
- days rated Good
- 63%
- cleaner than US metros
- 118
- worst single reading
No day crossed into the Unhealthy tier across the metro's monitors in 2025.
Annual release change
What changed in the 2025 EPA annual release
- Coeur d'Alene, ID metro's Good-day share fell from 82.2% to 78.5% between the 2024 and 2025 EPA annual releases, a change of -3.7 percentage points.
- Coeur d'Alene, ID metro's median AQI rose from 24 to 31 between the 2024 and 2025 EPA annual releases, a change of +7 points.
Coeur d'Alene, ID's median AQI 31 is in the lower (cleaner) CBSA tercile on this site. Signature read: median AQI 31 (low tercile vs CBSA corpus). Aggregated EPA AQS monitors across this Core-Based Statistical Area logged a median Air Quality Index of 31 over 352 measured days in 2025 (Good / Good). The monitored-day split lands at 274 Good (78%), 75 Moderate (21%), and 3 Unhealthy-for-Sensitive-Groups (1%). The 90th-percentile AQI finished at 58; the highest single-day reading hit 118 (USG).
Across 2020–2025, Good-day share shifted -4.2 points and median AQI moved +5 (worsening). No Unhealthy-tier days appear in this annual dataset. Metros with comparable AQI profiles include Athens, OH (83.4% good, AQI 31); Bellingham, WA (94.0% good, AQI 31); Clearlake, CA (99.2% good, AQI 31).
Air Quality Summary
Median AQI
31
Good
Good Days
77.8%
274 of 352 days
Max AQI
118
USG
Health Grade
Good
90th pct: 58
AQI Day Breakdown (2025)
Distribution of 352 monitored days across EPA AQI categories.
Good
274
78%
Moderate
75
21%
USG
3
1%
Unhealthy
0
0%
Very Unhealthy
0
0%
Hazardous
0
0%
Health Impact Assessment
The Coeur d'Alene, ID metro area's air quality is rated Good based on 77.8% 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 Coeur d'Alene, ID metro compare?
How Coeur d'Alene, ID compares
5-Year Air Quality Trend
Air quality is worsening in the Coeur d'Alene, ID metro. Highest Good-day share: 2020 (82.8%, 288 of 348 monitored days).
| Year | Good | Moderate | Unhealthy | Median AQI | Max AQI |
|---|---|---|---|---|---|
| 2020 | 288 | 58 | 2 | 26 | 518 |
| 2021 | 268 | 81 | 5 | 31 | 195 |
| 2022 | 264 | 88 | 3 | 29 | 186 |
| 2023 | 279 | 78 | 1 | 32 | 222 |
| 2024 | 291 | 63 | 0 | 24 | 109 |
| 2025 | 274 | 75 | 0 | 31 | 118 |
Metros with a similar median AQI
CBSA peers nationwide whose annual median AQI sits near Coeur d'Alene, ID (31).
Athens, OH
Median AQI 31 · 83.4% Good-day share
Bellingham, WA
Median AQI 31 · 94.0% Good-day share
Clearlake, CA
Median AQI 31 · 99.2% Good-day share
Moscow, ID
Median AQI 31 · 83.4% Good-day share
Cookeville, TN
Median AQI 30 · 90.0% Good-day share
Crescent City, CA
Median AQI 32 · 81.8% Good-day share
Metros with similar unhealthy-day exposure
A second relationship type: metros whose unhealthy-or-worse day count is closest to Coeur d'Alene, ID's 0 (independent of median AQI).
Aberdeen, SD
0 unhealthy-or-worse days · median AQI 27
Aberdeen, WA
0 unhealthy-or-worse days · median AQI 22
Adrian, MI
0 unhealthy-or-worse days · median AQI 41
Akron, OH
0 unhealthy-or-worse days · median AQI 45
Albany, GA
0 unhealthy-or-worse days · median AQI 46
Albany, OR
0 unhealthy-or-worse days · median AQI 27
Frequently Asked Questions
What does AQI 31 mean for health? ▼
How many unhealthy air days does Coeur d'Alene, ID have? ▼
What is the air quality in the Coeur d'Alene, ID metro area? ▼
Is air quality in Coeur d'Alene, ID getting better or worse? ▼
How does Coeur d'Alene, ID compare to other metro areas? ▼
What is the 90th percentile AQI for Coeur d'Alene, ID? ▼
Data Sources
Primary Source: U.S. Environmental Protection Agency (EPA), Air Quality System (AQS), Annual AQI by CBSA dataset for Coeur d'Alene, ID, 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, Coeur d'Alene, ID · 2020–2025