Tulsa Best & Worst AQI Days: Air Quality Guide
The worst air quality day on record for Tulsa (Tulsa, OK area) was March 14, 2025, when the daily AQI reached 508 (Hazardous), set by coarse dust (PM10). Across 2,557 monitored days in 2019–2025, 8 of the 10 worst days were Unhealthy (AQI 151+) or worse; 8 of the 10 were driven by ground-level ozone and 1 by coarse dust (PM10), and 4 of them fell in 2023. The cleanest day was October 14, 2023 at AQI 19 (Good); the 10 best days span 5 different years.
Extra Protection for Tulsa Homes
Air quality in Tulsa is moderate (AQI 68), with fine particles (PM2.5) the main concern. A True-HEPA purifier gives sensitive groups — kids, seniors and anyone with asthma or allergies — cleaner air indoors on days like today.
Recommended: Coway AP-1512HH Mighty — True HEPA + carbon · CADR ~246 CFM · rooms up to 361 sq ft
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When were Tulsa's worst and best air quality days?
Worst: March 14, 2025, AQI 508 (Hazardous, PM10). Best: October 14, 2023, AQI 19 (Good). Based on 2,557 EPA-monitored days in the Tulsa, OK area, 2019–2025.
- ✓8 of the 10 worst days were Unhealthy (AQI 151+) or worse; the 10th-worst was AQI 147 (Unhealthy for Sensitive Groups).
- ✓Ground-level ozone drove 8 of the 10 worst days.
- ✓2023 accounts for 4 of the 10 worst days.
Frequently asked questions
What was the worst air quality day in Tulsa?▾
March 14, 2025: the Tulsa, OK area's daily AQI hit 508 (Hazardous), driven by coarse dust (PM10). That is the highest of 2,557 monitored days in 2019–2025.
What was the best air quality day in Tulsa?▾
October 14, 2023, with a daily AQI of 19 (Good). The daily AQI is the highest reading from any monitor in the area, so even the cleanest day reflects the area's worst monitor.
What was Tulsa's worst air quality day in 2025?▾
March 14, 2025, AQI 508 (Hazardous), set by coarse dust (PM10).
Which pollutant causes Tulsa's worst air days?▾
Ground-level ozone set the AQI on 8 of the 10 worst days; coarse dust (PM10) on 1. The tables above list the defining pollutant for every day.
Tulsa's 10 worst air quality days, 2019–2025
Highest daily AQI recorded for the Tulsa, OK area (EPA AQS). The daily AQI is the highest reading from any monitor in the area that day.
| # | Date | AQI | Category | Defining pollutant |
|---|---|---|---|---|
| 1 | (2025 page) | 508 | Hazardous | PM10 — coarse dust (PM10) |
| 2 | (2023 page) | 197 | Unhealthy | O3 — ground-level ozone, in peak ozone season |
| 3 | (2022 page) | 185 | Unhealthy | O3 — ground-level ozone, in peak ozone season |
| 4 | (2024 page) | 179 | Unhealthy | O3 — ground-level ozone |
| 5 | (2022 page) | 179 | Unhealthy | O3 — ground-level ozone, in peak ozone season |
| 6 | (2021 page) | 168 | Unhealthy | PM2.5 — fine particulate matter (PM2.5) |
| 7 | (2023 page) | 154 | Unhealthy | O3 — ground-level ozone, in peak ozone season |
| 8 | (2021 page) | 154 | Unhealthy | O3 — ground-level ozone, in peak ozone season |
| 9 | (2023 page) | 150 | Unhealthy for Sensitive Groups | O3 — ground-level ozone, in peak ozone season |
| 10 | (2023 page) | 147 | Unhealthy for Sensitive Groups | O3 — ground-level ozone, in peak ozone season |
Worst day of each year in Tulsa
The single highest-AQI day in each year on record. Click a year for its full month-by-month statistics.
| Year | Worst day | AQI | Category | Defining pollutant |
|---|---|---|---|---|
| 2019 | 105 | Unhealthy for Sensitive Groups | O3 — ground-level ozone, in peak ozone season | |
| 2020 | 129 | Unhealthy for Sensitive Groups | O3 — ground-level ozone, in peak ozone season | |
| 2021 | 168 | Unhealthy | PM2.5 — fine particulate matter (PM2.5) | |
| 2022 | 185 | Unhealthy | O3 — ground-level ozone, in peak ozone season | |
| 2023 | 197 | Unhealthy | O3 — ground-level ozone, in peak ozone season | |
| 2024 | 179 | Unhealthy | O3 — ground-level ozone | |
| 2025 | 508 | Hazardous | PM10 — coarse dust (PM10) |
Tulsa's 10 best air quality days, 2019–2025
Lowest daily AQI recorded for the Tulsa, OK area. Ties are listed most recent first.
| # | Date | AQI | Category | Defining pollutant |
|---|---|---|---|---|
| 1 | (2023 page) | 19 | Good | O3 — ground-level ozone |
| 2 | (2025 page) | 21 | Good | PM2.5 — fine particulate matter (PM2.5) |
| 3 | (2020 page) | 21 | Good | PM2.5 — fine particulate matter (PM2.5) |
| 4 | (2019 page) | 21 | Good | O3 — ground-level ozone |
| 5 | (2025 page) | 22 | Good | PM2.5 — fine particulate matter (PM2.5) |
| 6 | (2025 page) | 23 | Good | PM2.5 — fine particulate matter (PM2.5) |
| 7 | (2019 page) | 23 | Good | PM2.5 — fine particulate matter (PM2.5) |
| 8 | (2019 page) | 23 | Good | O3 — ground-level ozone |
| 9 | (2025 page) | 24 | Good | PM2.5 — fine particulate matter (PM2.5) |
| 10 | (2024 page) | 24 | Good | PM2.5 — fine particulate matter (PM2.5) |
Right now in Tulsa
The latest EPA AirNow observation puts Tulsa's AQI at 68 (PM2.5). The days above are historical records, not today's reading.
View current Tulsa air quality →Source: EPA Air Quality System (AQS) pre-generated Daily AQI by CBSA files — daily AQI by CBSA (Tulsa, OK), 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.