Post Falls, Idaho Air Quality
Post Falls air quality today — the AQI, the main pollutant, and whether it’s safe to exercise outside right now
Post Falls, ID · Air quality right now
The air quality index in Post Falls, ID is 49 (Good) right now — safe for outdoor activity.
Is it safe to be outside in Post Falls today?
AQI 49 Yes — air quality is Good
Air is clean — great for outdoor activity.Main pollutant: PM2.5Observed 1:00 AM PDT
Pollutants right now
- PM2.511 µg/m³Main pollutantfine particles — smoke, exhaust, soot
- PM1012 µg/m³coarse particles — dust, pollen, ash
- Ozone32 µg/m³smog — builds on hot, sunny days
- NO₂23 µg/m³nitrogen dioxide — traffic, combustion
ExerciseOK to run — no air-quality limits on outdoor exercise.
How to read Post Falls’s air quality
Guides: The AQI Scale, Explained · Air Quality Alerts, Decoded · How to Read a Wildfire Smoke Map · Why Wildfire Smoke Travels 1,000 Miles.
Air quality over time in Post Falls
Across the EPA’s county records from 2020 to 2025, Post Falls’s cleanest year was 2024 (median AQI 24) and its most polluted was 2023 (median AQI 32); the typical (median) day has held roughly steady since 2020.
| Year | Median AQI | Unhealthy+ | Main pollutant | USG | Moderate | Good |
|---|---|---|---|---|---|---|
| 2020 | 26 | 7 | PM2.5 | 1 | 58 | 288 |
| 2021 | 31 | 5 | PM2.5 | 3 | 81 | 268 |
| 2022 | 29 | 3 | PM2.5 | 4 | 88 | 264 |
| 2023 | 32 | 2 | PM2.5 | 2 | 78 | 279 |
| 2024 | 24 | 0 | PM2.5 | 1 | 63 | 291 |
| 2025 | 31 | 0 | PM2.5 | 3 | 75 | 274 |
“USG” is Unhealthy for Sensitive Groups (AQI 101–150); “Unhealthy+” combines the Unhealthy, Very Unhealthy, and Hazardous days. In 2024 the EPA tightened the annual fine-particle (PM2.5) standard to 9 µg/m³ from the previous 12 µg/m³, so counties near the old limit read worse against the new one. Source: EPA AQS annual summaries, 2020–2025.
Frequently asked
- What was the worst year for air quality in Post Falls?
- In the EPA's 2020–2025 county records, 2021 had the most days above AQI 100: 8 days (3 Unhealthy for Sensitive Groups, 5 Unhealthy or worse). The highest median AQI came in 2023 (32; 2021's was 31).
- How many unhealthy air days does Post Falls have?
- Across 2020–2025, 1% of the days reported for Post Falls's county had an AQI above 100 (31 of 2138), about 5 days a year. 2025 had 3 days.
- What's the main air pollutant in Post Falls?
- PM2.5: it drove Post Falls's county AQI on the most days in every year of the EPA's 2020–2025 records.