Springfield Best & Worst AQI Days: Air Quality Guide
The worst air quality day on record for Springfield (Springfield, MA area) was June 8, 2023, when the daily AQI reached 153 (Unhealthy), set by fine particulate matter (PM2.5), in wildfire smoke season. Across 2,556 monitored days in 2019–2025, 2 of the 10 worst days were Unhealthy (AQI 151+) or worse; 6 of the 10 were driven by fine particulate matter (PM2.5) and 4 by ground-level ozone, and 5 of them fell in 2023. The cleanest day was January 8, 2025 at AQI 11 (Good); the 10 best days span 4 different years.
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When were Springfield's worst and best air quality days?
Worst: June 8, 2023, AQI 153 (Unhealthy, PM2.5). Best: January 8, 2025, AQI 11 (Good). Based on 2,556 EPA-monitored days in the Springfield, MA area, 2019–2025.
- ✓2 of the 10 worst days were Unhealthy (AQI 151+) or worse; the 10th-worst was AQI 115 (Unhealthy for Sensitive Groups).
- ✓Fine particulate matter (PM2.5) drove 6 of the 10 worst days.
- ✓2023 accounts for 5 of the 10 worst days.
Frequently asked questions
What was the worst air quality day in Springfield?▾
June 8, 2023: the Springfield, MA area's daily AQI hit 153 (Unhealthy), driven by fine particulate matter (PM2.5), in wildfire smoke season. That is the highest of 2,556 monitored days in 2019–2025.
What was the best air quality day in Springfield?▾
January 8, 2025, with a daily AQI of 11 (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 Springfield's worst air quality day in 2025?▾
August 5, 2025, AQI 124 (Unhealthy for Sensitive Groups), set by fine particulate matter (PM2.5), in wildfire smoke season.
Which pollutant causes Springfield's worst air days?▾
Fine particulate matter (PM2.5) set the AQI on 6 of the 10 worst days; ground-level ozone on 4. The tables above list the defining pollutant for every day.
Springfield's 10 worst air quality days, 2019–2025
Highest daily AQI recorded for the Springfield, MA area (EPA AQS). The daily AQI is the highest reading from any monitor in the area that day.
| # | Date | AQI | Category | Defining pollutant |
|---|---|---|---|---|
| 1 | (2023 page) | 153 | Unhealthy | PM2.5 — fine particulate matter (PM2.5), in wildfire smoke season |
| 2 | (2023 page) | 153 | Unhealthy | PM2.5 — fine particulate matter (PM2.5), in wildfire smoke season |
| 3 | (2023 page) | 150 | Unhealthy for Sensitive Groups | O3 — ground-level ozone, in peak ozone season |
| 4 | (2023 page) | 141 | Unhealthy for Sensitive Groups | PM2.5 — fine particulate matter (PM2.5), in wildfire smoke season |
| 5 | (2023 page) | 136 | Unhealthy for Sensitive Groups | O3 — ground-level ozone |
| 6 | (2025 page) | 124 | Unhealthy for Sensitive Groups | PM2.5 — fine particulate matter (PM2.5), in wildfire smoke season |
| 7 | (2025 page) | 122 | Unhealthy for Sensitive Groups | PM2.5 — fine particulate matter (PM2.5), in wildfire smoke season |
| 8 | (2024 page) | 119 | Unhealthy for Sensitive Groups | O3 — ground-level ozone, in peak ozone season |
| 9 | (2021 page) | 116 | Unhealthy for Sensitive Groups | PM2.5 — fine particulate matter (PM2.5), in wildfire smoke season |
| 10 | (2025 page) | 115 | Unhealthy for Sensitive Groups | O3 — ground-level ozone, in peak ozone season |
Worst day of each year in Springfield
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 | 93 | Moderate | PM2.5 — fine particulate matter (PM2.5) | |
| 2020 | 99 | Moderate | PM2.5 — fine particulate matter (PM2.5) | |
| 2021 | 116 | Unhealthy for Sensitive Groups | PM2.5 — fine particulate matter (PM2.5), in wildfire smoke season | |
| 2022 | 115 | Unhealthy for Sensitive Groups | O3 — ground-level ozone, in peak ozone season | |
| 2023 | 153 | Unhealthy | PM2.5 — fine particulate matter (PM2.5), in wildfire smoke season | |
| 2024 | 119 | Unhealthy for Sensitive Groups | O3 — ground-level ozone, in peak ozone season | |
| 2025 | 124 | Unhealthy for Sensitive Groups | PM2.5 — fine particulate matter (PM2.5), in wildfire smoke season |
Springfield's 10 best air quality days, 2019–2025
Lowest daily AQI recorded for the Springfield, MA area. Ties are listed most recent first.
| # | Date | AQI | Category | Defining pollutant |
|---|---|---|---|---|
| 1 | (2025 page) | 11 | Good | PM2.5 — fine particulate matter (PM2.5) |
| 2 | (2023 page) | 18 | Good | O3 — ground-level ozone |
| 3 | (2024 page) | 19 | Good | O3 — ground-level ozone |
| 4 | (2023 page) | 19 | Good | O3 — ground-level ozone |
| 5 | (2021 page) | 19 | Good | O3 — ground-level ozone, in peak ozone season |
| 6 | (2023 page) | 20 | Good | O3 — ground-level ozone |
| 7 | (2025 page) | 21 | Good | PM2.5 — fine particulate matter (PM2.5) |
| 8 | (2025 page) | 21 | Good | O3 — ground-level ozone |
| 9 | (2023 page) | 21 | Good | O3 — ground-level ozone |
| 10 | (2021 page) | 21 | Good | O3 — ground-level ozone |
Right now in Springfield
The latest EPA AirNow observation puts Springfield's AQI at 33 (PM2.5). The days above are historical records, not today's reading.
View current Springfield air quality →Source: EPA Air Quality System (AQS) pre-generated Daily AQI by CBSA files — daily AQI by CBSA (Springfield, MA), 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.