Toledo Air Quality in Spring
Across 2019–2025, Toledo's spring (March–May) air quality had a median AQI of 44 (Good) over 644 monitored days in the Toledo, OH area. 1.4% of spring days (9 of 644) reached Unhealthy for Sensitive Groups or worse, and ground-level ozone set the daily AQI on 66.8% of days. The cleanest spring on record here was 2020 (median AQI 40, 0 days above 100) and the worst was 2021 (median 43, 4 days above 100, peak AQI 122).
- Good: 70.0%
- Moderate: 28.6%
- Unhealthy for Sensitive Groups: 1.4%
- Unhealthy or worse: 0.0%
Improve Indoor Air Quality
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How is the air in Toledo in spring?
Good on a typical day: median AQI 44 across 2019–2025, with 1.4% of spring days above AQI 100. Ground-level ozone is the main driver.
- ✓70.0% of spring days were Good (AQI 0–50), 28.6% Moderate (51–100).
- ✓9 days of 644 reached AQI 101+; the spring peak was 122.
- ✓Cleanest month: March; worst month: May.
Frequently asked questions
What is the air quality like in Toledo in spring?▾
Across 2019–2025, the median daily AQI in Toledo in spring was 44 (Good). 70.0% of days were Good, 28.6% Moderate, and 1.4% reached Unhealthy for Sensitive Groups or worse, based on 644 monitored days in EPA's Air Quality System.
Is spring a good time for outdoor exercise in Toledo?▾
A typical spring day in Toledo sits in the Good range (median AQI 44), so running, cycling and children's outdoor play are fine for everyone on most days; about 1 day in 71 of spring days (1.4%) reached AQI 101+ in 2019–2025.
Which pollutant causes Toledo's spring air quality problems?▾
Ground-level ozone set the daily AQI on 66.8% of spring days in Toledo. The highest spring AQI recorded in 2019–2025 was 122 (Unhealthy for Sensitive Groups), in 2021.
Toledo spring air quality, year by year
Toledo spring air quality by year (Toledo, OH, EPA AQS daily AQI)
| Year | Days monitored | Median AQI | Days above 100 | Peak AQI | Main pollutant |
|---|---|---|---|---|---|
| 2019 | 92 | 44 | 0 | 84 | O3 |
| 2020cleanest | 92 | 40 | 0 | 56 | O3 |
| 2021worst | 92 | 43 | 4 | 122 | O3 |
| 2022 | 92 | 42 | 1 | 112 | O3 |
| 2023 | 92 | 46 | 3 | 108 | O3 |
| 2024 | 92 | 48 | 0 | 87 | O3 |
| 2025 | 92 | 44 | 1 | 101 | O3 |
What spring air means in Toledo
A typical spring day in Toledo sits in the Good range (median AQI 44), so running, cycling and children's outdoor play are fine for everyone on most days; about 1 day in 71 of spring days (1.4%) reached AQI 101+ in 2019–2025.
Spring's median AQI of 44 is in line with Toledo's whole-year median of 45, 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 Toledo runs in line with the national Spring norm; 1.4% of its Spring days topped AQI 100 versus 0.8% nationally (about the same).
Within the season, March is the cleanest month (median AQI 41, 0.0% of days above 100) and May the worst (median 46, 3.2% above 100).
Activity-specific thresholds: running, cycling, kids' sports.
Right now in Toledo
The latest EPA AirNow observation puts Toledo's AQI at 33 (PM2.5). The figures above are multi-year season statistics, not today's reading.
View current Toledo air quality →Source: EPA Air Quality System (AQS) pre-generated Daily AQI by CBSA files — daily AQI by CBSA (Toledo, OH), 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.