Baltimore Air Quality in 2024
In 2024, Baltimore's air quality (Baltimore-Columbia-Towson, MD area) had a median daily AQI of 47 (Good) across 366 monitored days. 12 days (3.3%) reached Unhealthy for Sensitive Groups or worse, 215 were Good, and the year's peak AQI was 154 (Unhealthy). Ground-level ozone set the daily AQI on 203 of those days. The cleanest month of 2024 was January (median AQI 40, 0 days above 100) and the worst was June (median 63, 4 days above 100, peak 122).
- Good: 58.7%
- Moderate: 38.0%
- Unhealthy for Sensitive Groups: 3.0%
- Unhealthy or worse: 0.3%
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How was Baltimore's air quality in 2024?
Good on a typical day: median AQI 47, with 12 days above AQI 100 out of 366 monitored — the 4th cleanest of 7 years on record for the area.
- ✓Peak AQI in 2024: 154 (Unhealthy).
- ✓Ground-level ozone was the main pollutant on 203 days.
- ✓Cleanest month: January; worst: June.
Frequently asked questions
What was the average AQI in Baltimore in 2024?▾
EPA's Air Quality System puts Baltimore's (Baltimore-Columbia-Towson, MD) median daily AQI for 2024 at 47, which is Good. 12 days were Unhealthy for Sensitive Groups or worse and the year's highest AQI was 154.
Which month had the worst air quality in Baltimore in 2024?▾
The cleanest month of 2024 was January (median AQI 40, 0 days above 100) and the worst was June (median 63, 4 days above 100, peak 122).
Was 2024 a good or bad year for Baltimore's air?▾
Among the 7 years EPA has published for the area (2019–2025), 2024 ranks 4th cleanest by days above AQI 100. 2024's median of 47 is in line with the area's typical annual median of 49.
Baltimore month by month in 2024
Baltimore air quality month by month, 2024 (Baltimore-Columbia-Towson, MD, EPA AQS daily AQI)
| Month | Days monitored | Median AQI | Days above 100 | Peak AQI | Main pollutant |
|---|---|---|---|---|---|
| Januarycleanest | 31 | 40 | 0 | 81 | PM2.5 |
| February | 29 | 51 | 0 | 67 | PM2.5 |
| March | 31 | 42 | 0 | 87 | O3 |
| April | 30 | 47 | 0 | 97 | O3 |
| May | 31 | 47 | 2 | 115 | O3 |
| Juneworst | 30 | 63 | 4 | 122 | O3 |
| July | 31 | 64 | 3 | 108 | O3 |
| August | 31 | 52 | 2 | 154 | O3 |
| September | 30 | 43 | 0 | 90 | O3 |
| October | 31 | 50 | 0 | 84 | PM2.5 |
| November | 30 | 42 | 1 | 112 | PM2.5 |
| December | 31 | 46 | 0 | 73 | PM2.5 |
How 2024 compares
Among the 7 years EPA has published for the area (2019–2025), 2024 ranks 4th cleanest by days above AQI 100.
2024's median of 47 is in line with the area's typical annual median of 49.
Activity-specific thresholds: running, cycling, kids' sports.
Right now in Baltimore
The latest EPA AirNow observation puts Baltimore's AQI at 43 (PM2.5). The figures above are multi-year annual statistics, not today's reading.
View current Baltimore air quality →Source: EPA Air Quality System (AQS) pre-generated Daily AQI by CBSA files — daily AQI by CBSA (Baltimore-Columbia-Towson, MD), 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.