St. Petersburg Air Quality in 2019
In 2019, St. Petersburg's air quality (Tampa-St. Petersburg-Clearwater, FL area) had a median daily AQI of 51 (Moderate) across 365 monitored days. 5 days (1.4%) reached Unhealthy for Sensitive Groups or worse, 177 were Good, and the year's peak AQI was 126 (Unhealthy for Sensitive Groups). Fine particulate matter (PM2.5) set the daily AQI on 260 of those days. The cleanest month of 2019 was August (median AQI 42, 0 days above 100) and the worst was April (median 54, 3 days above 100, peak 126).
- Good: 48.5%
- Moderate: 50.1%
- Unhealthy for Sensitive Groups: 1.4%
- Unhealthy or worse: 0.0%
Reduce Indoor Ozone in St. Petersburg
Today's main pollutant in St. Petersburg is ground-level ozone (AQI 24). Important: standard HEPA filters do NOT remove ozone — only a purifier with a substantial activated-carbon bed adsorbs it. The biggest wins are cutting indoor sources (gas appliances, certain "ionizer" purifiers) and ventilating when outdoor ozone is low (early morning). A high-carbon unit helps with the gases and VOCs that linger indoors.
Recommended: Levoit Core 300 — True HEPA + activated carbon · CADR ~141 CFM · rooms up to 219 sq ft
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How was St. Petersburg's air quality in 2019?
Moderate on a typical day: median AQI 51, with 5 days above AQI 100 out of 365 monitored — the 5th cleanest of 7 years on record for the area.
- ✓Peak AQI in 2019: 126 (Unhealthy for Sensitive Groups).
- ✓Fine particulate matter (PM2.5) was the main pollutant on 260 days.
- ✓Cleanest month: August; worst: April.
Frequently asked questions
What was the average AQI in St. Petersburg in 2019?▾
EPA's Air Quality System puts St. Petersburg's (Tampa-St. Petersburg-Clearwater, FL) median daily AQI for 2019 at 51, which is Moderate. 5 days were Unhealthy for Sensitive Groups or worse and the year's highest AQI was 126.
Which month had the worst air quality in St. Petersburg in 2019?▾
The cleanest month of 2019 was August (median AQI 42, 0 days above 100) and the worst was April (median 54, 3 days above 100, peak 126).
Was 2019 a good or bad year for St. Petersburg's air?▾
Among the 7 years EPA has published for the area (2019–2025), 2019 ranks 5th cleanest by days above AQI 100. 2019's median of 51 is in line with the area's typical annual median of 51.
St. Petersburg month by month in 2019
St. Petersburg air quality month by month, 2019 (Tampa-St. Petersburg-Clearwater, FL, EPA AQS daily AQI)
| Month | Days monitored | Median AQI | Days above 100 | Peak AQI | Main pollutant |
|---|---|---|---|---|---|
| January | 31 | 53 | 0 | 70 | PM2.5 |
| February | 28 | 50 | 0 | 62 | PM2.5 |
| March | 31 | 52 | 0 | 100 | PM2.5 |
| Aprilworst | 30 | 54 | 3 | 126 | O3 |
| May | 31 | 54 | 1 | 105 | O3 |
| June | 30 | 54 | 1 | 101 | PM2.5 |
| July | 31 | 52 | 0 | 84 | PM2.5 |
| Augustcleanest | 31 | 42 | 0 | 69 | PM2.5 |
| September | 30 | 48 | 0 | 93 | PM2.5 |
| October | 31 | 47 | 0 | 61 | PM2.5 |
| November | 30 | 50 | 0 | 70 | PM2.5 |
| December | 31 | 44 | 0 | 81 | PM2.5 |
How 2019 compares
Among the 7 years EPA has published for the area (2019–2025), 2019 ranks 5th cleanest by days above AQI 100.
2019's median of 51 is in line with the area's typical annual median of 51.
Activity-specific thresholds: running, cycling, kids' sports.
Right now in St. Petersburg
The latest EPA AirNow observation puts St. Petersburg's AQI at 24 (O3). The figures above are multi-year annual statistics, not today's reading.
View current St. Petersburg air quality →Source: EPA Air Quality System (AQS) pre-generated Daily AQI by CBSA files — daily AQI by CBSA (Tampa-St. Petersburg-Clearwater, FL), 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.