Toledo Air Quality in 2020
In 2020, Toledo's air quality (Toledo, OH area) had a median daily AQI of 42 (Good) across 354 monitored days. 8 days (2.3%) reached Unhealthy for Sensitive Groups or worse, 250 were Good, and the year's peak AQI was 136 (Unhealthy for Sensitive Groups). Fine particulate matter (PM2.5) set the daily AQI on 198 of those days. The cleanest month of 2020 was October (median AQI 33, 0 days above 100) and the worst was July (median 54, 6 days above 100, peak 136).
- Good: 70.6%
- Moderate: 27.1%
- Unhealthy for Sensitive Groups: 2.3%
- Unhealthy or worse: 0.0%
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How was Toledo's air quality in 2020?
Good on a typical day: median AQI 42, with 8 days above AQI 100 out of 354 monitored — the 5th cleanest of 7 years on record for the area.
- ✓Peak AQI in 2020: 136 (Unhealthy for Sensitive Groups).
- ✓Fine particulate matter (PM2.5) was the main pollutant on 198 days.
- ✓Cleanest month: October; worst: July.
Frequently asked questions
What was the average AQI in Toledo in 2020?▾
EPA's Air Quality System puts Toledo's (Toledo, OH) median daily AQI for 2020 at 42, which is Good. 8 days were Unhealthy for Sensitive Groups or worse and the year's highest AQI was 136.
Which month had the worst air quality in Toledo in 2020?▾
The cleanest month of 2020 was October (median AQI 33, 0 days above 100) and the worst was July (median 54, 6 days above 100, peak 136).
Was 2020 a good or bad year for Toledo's air?▾
Among the 7 years EPA has published for the area (2019–2025), 2020 ranks 5th cleanest by days above AQI 100. 2020's median of 42 is below the area's typical annual median of 45.
Toledo month by month in 2020
Toledo air quality month by month, 2020 (Toledo, OH, EPA AQS daily AQI)
| Month | Days monitored | Median AQI | Days above 100 | Peak AQI | Main pollutant |
|---|---|---|---|---|---|
| January | 28 | 39 | 0 | 64 | PM2.5 |
| February | 25 | 39 | 0 | 66 | PM2.5 |
| March | 31 | 37 | 0 | 52 | O3 |
| April | 30 | 41 | 0 | 47 | O3 |
| May | 31 | 43 | 0 | 56 | O3 |
| June | 30 | 55 | 2 | 133 | O3 |
| Julyworst | 31 | 54 | 6 | 136 | O3 |
| August | 31 | 52 | 0 | 84 | PM2.5 |
| September | 30 | 51 | 0 | 90 | PM2.5 |
| Octobercleanest | 31 | 33 | 0 | 58 | PM2.5 |
| November | 30 | 40 | 0 | 68 | PM2.5 |
| December | 26 | 39 | 0 | 79 | PM2.5 |
How 2020 compares
Among the 7 years EPA has published for the area (2019–2025), 2020 ranks 5th cleanest by days above AQI 100.
2020's median of 42 is below the area's typical annual median of 45.
Activity-specific thresholds: running, cycling, kids' sports.
Right now in Toledo
The latest EPA AirNow observation puts Toledo's AQI at 31 (PM2.5). The figures above are multi-year annual 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.