Bad Air Days in Susquehanna County, Pennsylvania: under 1 a Year
under 1 bad air day a year
Rare: among the cleanest-air counties EPA monitors. Ranked 768 of 996 monitored counties, where 1 is worst.
What makes them bad: mostly particles: smoke and dust (100% particle days).
The bad-air season here
- J
- F
- M
- A
- M
- J
- J
- A
- S
- O
- N
- D
Most bad days here fall in July and August. Averaged over 2016 to 2025.
What actually helps here
- Bad air days are rare here. A standard furnace filter is enough; no purifier needed for outdoor air.
- On the odd bad day, check AirNow and keep windows shut.
The worst days on file
The worst recent year was 2025, with 2 bad days on 311 monitored days.
| Date | AQI | Main pollutant |
|---|---|---|
| 2021-07-20 | 133 | PM2.5 |
| 2025-08-04 | 107 | PM2.5 |
| 2025-08-05 | 107 | PM2.5 |
| 2021-07-26 | 101 | PM2.5 |
| 2025-08-06 | 99 | PM2.5 |
The air on a normal day
Across 2,239 monitored days from 2018 to 2025, the air in Susquehanna County rated Good on 83% of them, more often than the 72% typical of monitored counties, and Moderate on 16%. The median day sat at AQI 30; one day in ten went above 53.
The pollutant setting the AQI on an ordinary day here:
- fine particles (PM2.5)100%2,239 days
Susquehanna County by year
| Year | Days monitored | Good | Moderate | Over 100 | Over 150 | Median AQI | Highest AQI |
|---|---|---|---|---|---|---|---|
| 2025* | 311 | 275 | 34 | 2 | 0 | 22 | 107 |
| 2024 | 358 | 321 | 37 | 0 | 0 | 25 | 64 |
| 2023 | 152 | 126 | 26 | 0 | 0 | 28 | 64 |
| 2022 | 279 | 219 | 60 | 0 | 0 | 33 | 67 |
| 2021 | 334 | 252 | 80 | 2 | 0 | 35 | 133 |
| 2020 | 365 | 311 | 54 | 0 | 0 | 31 | 74 |
| 2019 | 352 | 292 | 60 | 0 | 0 | 32 | 79 |
| 2018 | 88 | 71 | 17 | 0 | 0 | 32 | 67 |
*2025 may be a partial year in EPA's file.
Pennsylvania compared
- Allegheny County12/yr
- Philadelphia County9/yr
- Bucks County8/yr
- Warren Countythin data
- Lancaster County6/yr
- Berks County5/yr
- Delaware County4/yr
- Northampton County4/yr
How this is counted
A bad air day is a day the county's daily AQI from EPA AirData went above 100, the level where EPA tells children, older adults and people with asthma or heart disease to cut back outdoors. Monitors do not run every day, so yearly counts are scaled to 365 days. This is the record, not today's air: for that, check AirNow. More on the method in how the county numbers are made, on the AQI 100 line in what counts as a bad air day.