Erie Air Quality in Spring
Across 2019–2025, Erie's spring (March–May) air quality had a median AQI of 38 (Good) over 639 monitored days in the Erie, PA area. 0.2% of spring days (1 of 639) reached Unhealthy for Sensitive Groups or worse, and ground-level ozone set the daily AQI on 49.6% of days. The cleanest spring on record here was 2025 (median AQI 28, 0 days above 100) and the worst was 2023 (median 41, 1 day above 100, peak AQI 101).
- Good: 79.3%
- Moderate: 20.5%
- Unhealthy for Sensitive Groups: 0.2%
- Unhealthy or worse: 0.0%
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How is the air in Erie in spring?
Good on a typical day: median AQI 38 across 2019–2025, with 0.2% of spring days above AQI 100. Ground-level ozone is the main driver.
- ✓79.3% of spring days were Good (AQI 0–50), 20.5% Moderate (51–100).
- ✓1 day of 639 reached AQI 101+; the spring peak was 101.
- ✓Cleanest month: April; worst month: May.
Frequently asked questions
What is the air quality like in Erie in spring?▾
Across 2019–2025, the median daily AQI in Erie in spring was 38 (Good). 79.3% of days were Good, 20.5% Moderate, and 0.2% reached Unhealthy for Sensitive Groups or worse, based on 639 monitored days in EPA's Air Quality System.
Is spring a good time for outdoor exercise in Erie?▾
A typical spring day in Erie sits in the Good range (median AQI 38), so running, cycling and children's outdoor play are fine for everyone on most days; fewer than 1% of spring days reached AQI 101+ in 2019–2025.
Which pollutant causes Erie's spring air quality problems?▾
Ground-level ozone set the daily AQI on 49.6% of spring days in Erie. The highest spring AQI recorded in 2019–2025 was 101 (Unhealthy for Sensitive Groups), in 2023.
Erie spring air quality, year by year
Erie spring air quality by year (Erie, PA, EPA AQS daily AQI)
| Year | Days monitored | Median AQI | Days above 100 | Peak AQI | Main pollutant |
|---|---|---|---|---|---|
| 2019 | 92 | 39 | 0 | 78 | PM2.5 |
| 2020 | 92 | 37 | 0 | 58 | O3 |
| 2021 | 87 | 38 | 0 | 71 | O3 |
| 2022 | 92 | 38 | 0 | 66 | PM2.5 |
| 2023worst | 92 | 41 | 1 | 101 | PM2.5 |
| 2024 | 92 | 40 | 0 | 77 | O3 |
| 2025cleanest | 92 | 28 | 0 | 60 | PM2.5 |
What spring air means in Erie
A typical spring day in Erie sits in the Good range (median AQI 38), so running, cycling and children's outdoor play are fine for everyone on most days; fewer than 1% of spring days reached AQI 101+ in 2019–2025.
Spring's median AQI of 38 is in line with Erie's whole-year median of 38, so this period is neither a clean nor a dirty stretch for the area. Nationally, the median Spring AQI across every EPA metro area (307,196 metro-days, 2019–2025) is 43, so Erie runs below the national Spring norm; 0.2% of its Spring days topped AQI 100 versus 0.8% nationally (about the same).
Within the season, April is the cleanest month (median AQI 37, 0.0% of days above 100) and May the worst (median 39, 0.5% above 100).
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 season 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.