Burlington Air Quality in 2020
In 2020, Burlington's air quality (Burlington-South Burlington, VT area) had a median daily AQI of 39 (Good) across 366 monitored days. 0 days (0.0%) reached Unhealthy for Sensitive Groups or worse, 302 were Good, and the year's peak AQI was 98 (Moderate). Ground-level ozone set the daily AQI on 206 of those days. The cleanest month of 2020 was September (median AQI 31, 0 days above 100) and the worst was February (median 47, 0 days above 100, peak 98).
- Good: 82.5%
- Moderate: 17.5%
- Unhealthy for Sensitive Groups: 0.0%
- Unhealthy or worse: 0.0%
Reduce Indoor Ozone in Burlington
Today's main pollutant in Burlington 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
As an Amazon Associate, we earn from qualifying purchases.
How was Burlington's air quality in 2020?
Good on a typical day: median AQI 39, with 0 days above AQI 100 out of 366 monitored — the 3rd cleanest of 7 years on record for the area.
- ✓Peak AQI in 2020: 98 (Moderate).
- ✓Ground-level ozone was the main pollutant on 206 days.
- ✓Cleanest month: September; worst: February.
Frequently asked questions
What was the average AQI in Burlington in 2020?▾
EPA's Air Quality System puts Burlington's (Burlington-South Burlington, VT) median daily AQI for 2020 at 39, which is Good. 0 days were Unhealthy for Sensitive Groups or worse and the year's highest AQI was 98.
Which month had the worst air quality in Burlington in 2020?▾
The cleanest month of 2020 was September (median AQI 31, 0 days above 100) and the worst was February (median 47, 0 days above 100, peak 98).
Was 2020 a good or bad year for Burlington's air?▾
Among the 7 years EPA has published for the area (2019–2025), 2020 ranks 3rd cleanest by days above AQI 100. 2020's median of 39 is in line with the area's typical annual median of 39.
Burlington month by month in 2020
Burlington air quality month by month, 2020 (Burlington-South Burlington, VT, EPA AQS daily AQI)
| Month | Days monitored | Median AQI | Days above 100 | Peak AQI | Main pollutant |
|---|---|---|---|---|---|
| January | 31 | 39 | 0 | 70 | PM2.5 |
| Februaryworst | 29 | 47 | 0 | 98 | PM2.5 |
| March | 31 | 43 | 0 | 65 | O3 |
| April | 30 | 42 | 0 | 50 | O3 |
| May | 31 | 43 | 0 | 61 | O3 |
| June | 30 | 39 | 0 | 54 | PM2.5 |
| July | 31 | 45 | 0 | 57 | PM2.5 |
| August | 31 | 37 | 0 | 52 | PM2.5 |
| Septembercleanest | 30 | 31 | 0 | 61 | O3 |
| October | 31 | 31 | 0 | 49 | O3 |
| November | 30 | 35 | 0 | 70 | O3 |
| December | 31 | 37 | 0 | 82 | PM2.5 |
How 2020 compares
Among the 7 years EPA has published for the area (2019–2025), 2020 ranks 3rd cleanest by days above AQI 100.
2020's median of 39 is in line with the area's typical annual median of 39.
Activity-specific thresholds: running, cycling, kids' sports.
Right now in Burlington
The latest EPA AirNow observation puts Burlington's AQI at 24 (O3). The figures above are multi-year annual statistics, not today's reading.
View current Burlington air quality →Source: EPA Air Quality System (AQS) pre-generated Daily AQI by CBSA files — daily AQI by CBSA (Burlington-South Burlington, VT), 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.