Toledo Air Quality in 2019
In 2019, Toledo's air quality (Toledo, OH area) had a median daily AQI of 44 (Good) across 351 monitored days. 1 day (0.3%) reached Unhealthy for Sensitive Groups or worse, 224 were Good, and the year's peak AQI was 143 (Unhealthy for Sensitive Groups). Fine particulate matter (PM2.5) set the daily AQI on 232 of those days. The cleanest month of 2019 was January (median AQI 34, 0 days above 100) and the worst was June (median 52, 1 day above 100, peak 143).
- Good: 63.8%
- Moderate: 35.9%
- Unhealthy for Sensitive Groups: 0.3%
- Unhealthy or worse: 0.0%
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How was Toledo's air quality in 2019?
Good on a typical day: median AQI 44, with 1 day above AQI 100 out of 351 monitored — the 1st cleanest of 7 years on record for the area.
- ✓Peak AQI in 2019: 143 (Unhealthy for Sensitive Groups).
- ✓Fine particulate matter (PM2.5) was the main pollutant on 232 days.
- ✓Cleanest month: January; worst: June.
Frequently asked questions
What was the average AQI in Toledo in 2019?▾
EPA's Air Quality System puts Toledo's (Toledo, OH) median daily AQI for 2019 at 44, which is Good. 1 day were Unhealthy for Sensitive Groups or worse and the year's highest AQI was 143.
Which month had the worst air quality in Toledo in 2019?▾
The cleanest month of 2019 was January (median AQI 34, 0 days above 100) and the worst was June (median 52, 1 day above 100, peak 143).
Was 2019 a good or bad year for Toledo's air?▾
Among the 7 years EPA has published for the area (2019–2025), 2019 ranks 1st cleanest by days above AQI 100 — the best year on record here. 2019's median of 44 is in line with the area's typical annual median of 45.
Toledo month by month in 2019
Toledo air quality month by month, 2019 (Toledo, OH, EPA AQS daily AQI)
| Month | Days monitored | Median AQI | Days above 100 | Peak AQI | Main pollutant |
|---|---|---|---|---|---|
| Januarycleanest | 31 | 34 | 0 | 81 | PM2.5 |
| February | 18 | 41 | 0 | 88 | PM2.5 |
| March | 31 | 43 | 0 | 84 | O3 |
| April | 30 | 44 | 0 | 67 | O3 |
| May | 31 | 44 | 0 | 67 | PM2.5 |
| Juneworst | 30 | 52 | 1 | 143 | O3 |
| July | 31 | 55 | 0 | 100 | O3 |
| August | 31 | 47 | 0 | 71 | PM2.5 |
| September | 30 | 46 | 0 | 80 | PM2.5 |
| October | 31 | 39 | 0 | 60 | PM2.5 |
| November | 30 | 40 | 0 | 78 | PM2.5 |
| December | 27 | 47 | 0 | 85 | PM2.5 |
How 2019 compares
Among the 7 years EPA has published for the area (2019–2025), 2019 ranks 1st cleanest by days above AQI 100 — the best year on record here.
2019's median of 44 is in line with 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.