Santa Fe Air Quality in September
Across 2019–2025, Santa Fe's September air quality had a median AQI of 45 (Good) over 209 monitored days in the Santa Fe, NM area. 0.0% of September days (0 of 209) reached Unhealthy for Sensitive Groups or worse, and ground-level ozone set the daily AQI on 97.1% of days. The cleanest September on record here was 2023 (median AQI 41, 0 days above 100) and the worst was 2020 (median 49, 0 days above 100, peak AQI 64).
- Good: 83.7%
- Moderate: 16.3%
- Unhealthy for Sensitive Groups: 0.0%
- Unhealthy or worse: 0.0%
Reduce Indoor Ozone in Santa Fe
Today's main pollutant in Santa Fe is ground-level ozone (AQI 35). 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 is the air in Santa Fe in September?
Good on a typical day: median AQI 45 across 2019–2025, with 0.0% of September days above AQI 100. Ground-level ozone is the main driver.
- ✓83.7% of September days were Good (AQI 0–50), 16.3% Moderate (51–100).
- ✓0 days of 209 reached AQI 101+; the September peak was 71.
- ✓Best September: 2023; worst September: 2020.
Frequently asked questions
What is the air quality like in Santa Fe in September?▾
Across 2019–2025, the median daily AQI in Santa Fe in September was 45 (Good). 83.7% of days were Good, 16.3% Moderate, and 0.0% reached Unhealthy for Sensitive Groups or worse, based on 209 monitored days in EPA's Air Quality System.
Is September a good time for outdoor exercise in Santa Fe?▾
A typical September day in Santa Fe sits in the Good range (median AQI 45), so running, cycling and children's outdoor play are fine for everyone on most days; fewer than 1% of September days reached AQI 101+ in 2019–2025.
Which pollutant causes Santa Fe's September air quality problems?▾
Ground-level ozone set the daily AQI on 97.1% of September days in Santa Fe. The highest September AQI recorded in 2019–2025 was 71 (Moderate), in 2020.
Santa Fe September air quality, year by year
Santa Fe September air quality by year (Santa Fe, NM, EPA AQS daily AQI)
| Year | Days monitored | Median AQI | Days above 100 | Peak AQI | Main pollutant |
|---|---|---|---|---|---|
| 2019 | 30 | 44 | 0 | 67 | O3 |
| 2020worst | 30 | 49 | 0 | 64 | O3 |
| 2021 | 30 | 48 | 0 | 71 | O3 |
| 2022 | 30 | 44 | 0 | 71 | O3 |
| 2023cleanest | 29 | 41 | 0 | 54 | O3 |
| 2024 | 30 | 46 | 0 | 64 | O3 |
| 2025 | 30 | 44 | 0 | 49 | O3 |
What September air means in Santa Fe
A typical September day in Santa Fe sits in the Good range (median AQI 45), so running, cycling and children's outdoor play are fine for everyone on most days; fewer than 1% of September days reached AQI 101+ in 2019–2025.
September's median AQI of 45 is in line with Santa Fe's whole-year median of 44, so this period is neither a clean nor a dirty stretch for the area. Nationally, the median September AQI across every EPA metro area (100,699 metro-days, 2019–2025) is 43, so Santa Fe runs in line with the national September norm; 0.0% of its September days topped AQI 100 versus 2.7% nationally (below average).
September is part of Santa Fe's fall season (September, October, November); the fall page pools all three months.
Activity-specific thresholds: running, cycling, kids' sports.
Right now in Santa Fe
The latest EPA AirNow observation puts Santa Fe's AQI at 35 (O3). The figures above are multi-year month statistics, not today's reading.
View current Santa Fe air quality →Source: EPA Air Quality System (AQS) pre-generated Daily AQI by CBSA files — daily AQI by CBSA (Santa Fe, NM), 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.