Erie Air Quality in 2025
In 2025, Erie's air quality (Erie, PA area) had a median daily AQI of 34 (Good) across 365 monitored days. 1 day (0.3%) reached Unhealthy for Sensitive Groups or worse, 280 were Good, and the year's peak AQI was 149 (Unhealthy for Sensitive Groups). Fine particulate matter (PM2.5) set the daily AQI on 228 of those days. The cleanest month of 2025 was November (median AQI 25, 0 days above 100) and the worst was August (median 40, 1 day above 100, peak 149).
- Good: 76.7%
- Moderate: 23.0%
- Unhealthy for Sensitive Groups: 0.3%
- Unhealthy or worse: 0.0%
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How was Erie's air quality in 2025?
Good on a typical day: median AQI 34, with 1 day above AQI 100 out of 365 monitored — the 6th cleanest of 7 years on record for the area.
- ✓Peak AQI in 2025: 149 (Unhealthy for Sensitive Groups).
- ✓Fine particulate matter (PM2.5) was the main pollutant on 228 days.
- ✓Cleanest month: November; worst: August.
Frequently asked questions
What was the average AQI in Erie in 2025?▾
EPA's Air Quality System puts Erie's (Erie, PA) median daily AQI for 2025 at 34, which is Good. 1 day were Unhealthy for Sensitive Groups or worse and the year's highest AQI was 149.
Which month had the worst air quality in Erie in 2025?▾
The cleanest month of 2025 was November (median AQI 25, 0 days above 100) and the worst was August (median 40, 1 day above 100, peak 149).
Was 2025 a good or bad year for Erie's air?▾
Among the 7 years EPA has published for the area (2019–2025), 2025 ranks 6th cleanest by days above AQI 100. 2025's median of 34 is below the area's typical annual median of 38.
Erie month by month in 2025
Erie air quality month by month, 2025 (Erie, PA, EPA AQS daily AQI)
| Month | Days monitored | Median AQI | Days above 100 | Peak AQI | Main pollutant |
|---|---|---|---|---|---|
| January | 31 | 35 | 0 | 63 | PM2.5 |
| February | 28 | 34 | 0 | 59 | PM2.5 |
| March | 31 | 27 | 0 | 60 | PM2.5 |
| April | 30 | 26 | 0 | 52 | PM2.5 |
| May | 31 | 34 | 0 | 55 | O3 |
| June | 30 | 52 | 0 | 99 | PM2.5 |
| July | 31 | 49 | 0 | 95 | PM2.5 |
| Augustworst | 31 | 40 | 1 | 149 | PM2.5 |
| September | 30 | 41 | 0 | 58 | PM2.5 |
| October | 31 | 28 | 0 | 51 | O3 |
| Novembercleanest | 30 | 25 | 0 | 59 | PM2.5 |
| December | 31 | 31 | 0 | 69 | PM2.5 |
How 2025 compares
Among the 7 years EPA has published for the area (2019–2025), 2025 ranks 6th cleanest by days above AQI 100.
2025's median of 34 is below the area's typical annual median of 38.
Activity-specific thresholds: running, cycling, kids' sports.
Right now in Erie
The latest EPA AirNow observation puts Erie's AQI at 40 (PM2.5). The figures above are multi-year annual statistics, not today's reading.
View current Erie air quality →Source: EPA Air Quality System (AQS) pre-generated Daily AQI by CBSA files — daily AQI by CBSA (Erie, PA), 2019–2025. Daily AQI per CBSA is the highest AQI reported by any monitor in the area that day; the defining parameter is the pollutant that set it. Month and season statistics pool every such day in the period across all years listed. Retrieved 2026-09-09.