Colorado Springs Air Quality in 2021
In 2021, Colorado Springs's air quality (Colorado Springs, CO area) had a median daily AQI of 47 (Good) across 365 monitored days. 28 days (7.7%) reached Unhealthy for Sensitive Groups or worse, 224 were Good, and the year's peak AQI was 140 (Unhealthy for Sensitive Groups). Ground-level ozone set the daily AQI on 333 of those days. The cleanest month of 2021 was November (median AQI 40, 0 days above 100) and the worst was July (median 97, 13 days above 100, peak 140).
- Good: 61.4%
- Moderate: 31.0%
- Unhealthy for Sensitive Groups: 7.7%
- Unhealthy or worse: 0.0%
Reduce Indoor Ozone in Colorado Springs
Today's main pollutant in Colorado Springs is ground-level ozone (AQI 36). 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
As an Amazon Associate, we earn from qualifying purchases.
How was Colorado Springs's air quality in 2021?
Good on a typical day: median AQI 47, with 28 days above AQI 100 out of 365 monitored — the 7th cleanest of 7 years on record for the area.
- ✓Peak AQI in 2021: 140 (Unhealthy for Sensitive Groups).
- ✓Ground-level ozone was the main pollutant on 333 days.
- ✓Cleanest month: November; worst: July.
Frequently asked questions
What was the average AQI in Colorado Springs in 2021?▾
EPA's Air Quality System puts Colorado Springs's (Colorado Springs, CO) median daily AQI for 2021 at 47, which is Good. 28 days were Unhealthy for Sensitive Groups or worse and the year's highest AQI was 140.
Which month had the worst air quality in Colorado Springs in 2021?▾
The cleanest month of 2021 was November (median AQI 40, 0 days above 100) and the worst was July (median 97, 13 days above 100, peak 140).
Was 2021 a good or bad year for Colorado Springs's air?▾
Among the 7 years EPA has published for the area (2019–2025), 2021 ranks 7th cleanest by days above AQI 100 — the worst year on record here. 2021's median of 47 is in line with the area's typical annual median of 46.
Colorado Springs month by month in 2021
Colorado Springs air quality month by month, 2021 (Colorado Springs, CO, EPA AQS daily AQI)
| Month | Days monitored | Median AQI | Days above 100 | Peak AQI | Main pollutant |
|---|---|---|---|---|---|
| January | 31 | 42 | 0 | 56 | O3 |
| February | 28 | 45 | 0 | 67 | O3 |
| March | 31 | 46 | 0 | 58 | O3 |
| April | 30 | 48 | 0 | 61 | O3 |
| May | 31 | 49 | 0 | 90 | O3 |
| June | 30 | 56 | 0 | 97 | O3 |
| Julyworst | 31 | 97 | 13 | 140 | O3 |
| August | 31 | 87 | 11 | 136 | O3 |
| September | 30 | 52 | 4 | 108 | O3 |
| October | 31 | 45 | 0 | 67 | O3 |
| Novembercleanest | 30 | 40 | 0 | 62 | O3 |
| December | 31 | 42 | 0 | 54 | O3 |
How 2021 compares
Among the 7 years EPA has published for the area (2019–2025), 2021 ranks 7th cleanest by days above AQI 100 — the worst year on record here.
2021's median of 47 is in line with the area's typical annual median of 46.
Activity-specific thresholds: running, cycling, kids' sports.
Right now in Colorado Springs
The latest EPA AirNow observation puts Colorado Springs's AQI at 36 (O3). The figures above are multi-year annual statistics, not today's reading.
View current Colorado Springs air quality →Source: EPA Air Quality System (AQS) pre-generated Daily AQI by CBSA files — daily AQI by CBSA (Colorado Springs, CO), 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.