Worcester Air Quality in February
Across 2019–2025, Worcester's February air quality had a median AQI of 47 (Good) over 198 monitored days in the Worcester, MA-CT area. 0.0% of February days (0 of 198) reached Unhealthy for Sensitive Groups or worse, and fine particulate matter (PM2.5) set the daily AQI on 68.7% of days. The cleanest February on record here was 2024 (median AQI 39, 0 days above 100) and the worst was 2021 (median 55, 0 days above 100, peak AQI 69).
- Good: 57.1%
- Moderate: 42.9%
- Unhealthy for Sensitive Groups: 0.0%
- Unhealthy or worse: 0.0%
Reduce Indoor Ozone in Worcester
Today's main pollutant in Worcester is ground-level ozone (AQI 32). 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 is the air in Worcester in February?
Good on a typical day: median AQI 47 across 2019–2025, with 0.0% of February days above AQI 100. Fine particulate matter (PM2.5) is the main driver.
- ✓57.1% of February days were Good (AQI 0–50), 42.9% Moderate (51–100).
- ✓0 days of 198 reached AQI 101+; the February peak was 80.
- ✓Best February: 2024; worst February: 2021.
Frequently asked questions
What is the air quality like in Worcester in February?▾
Across 2019–2025, the median daily AQI in Worcester in February was 47 (Good). 57.1% of days were Good, 42.9% Moderate, and 0.0% reached Unhealthy for Sensitive Groups or worse, based on 198 monitored days in EPA's Air Quality System.
Is February a good time for outdoor exercise in Worcester?▾
A typical February day in Worcester sits in the Good range (median AQI 47), so running, cycling and children's outdoor play are fine for everyone on most days; fewer than 1% of February days reached AQI 101+ in 2019–2025.
Which pollutant causes Worcester's February air quality problems?▾
Fine particulate matter (PM2.5) set the daily AQI on 68.7% of February days in Worcester. The highest February AQI recorded in 2019–2025 was 80 (Moderate), in 2021.
Worcester February air quality, year by year
Worcester February air quality by year (Worcester, MA-CT, EPA AQS daily AQI)
| Year | Days monitored | Median AQI | Days above 100 | Peak AQI | Main pollutant |
|---|---|---|---|---|---|
| 2019 | 28 | 50 | 0 | 80 | PM2.5 |
| 2020 | 29 | 48 | 0 | 65 | PM2.5 |
| 2021worst | 28 | 55 | 0 | 69 | PM2.5 |
| 2022 | 28 | 52 | 0 | 65 | PM2.5 |
| 2023 | 28 | 42 | 0 | 63 | PM2.5 |
| 2024cleanest | 29 | 39 | 0 | 58 | O3 |
| 2025 | 28 | 40 | 0 | 56 | O3 |
What February air means in Worcester
A typical February day in Worcester sits in the Good range (median AQI 47), so running, cycling and children's outdoor play are fine for everyone on most days; fewer than 1% of February days reached AQI 101+ in 2019–2025.
February's median AQI of 47 is above Worcester's whole-year median of 43, making it one of the area's dirtier periods. Nationally, the median February AQI across every EPA metro area (87,428 metro-days, 2019–2025) is 41, so Worcester runs above the national February norm; 0.0% of its February days topped AQI 100 versus 0.4% nationally (about the same).
February is part of Worcester's winter season (December, January, February); the winter page pools all three months.
Activity-specific thresholds: running, cycling, kids' sports.
Right now in Worcester
The latest EPA AirNow observation puts Worcester's AQI at 32 (O3). The figures above are multi-year month statistics, not today's reading.
View current Worcester air quality →Source: EPA Air Quality System (AQS) pre-generated Daily AQI by CBSA files — daily AQI by CBSA (Worcester, MA-CT), 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.