Billings Air Quality in 2022
In 2022, Billings's air quality (Billings, MT area) had a median daily AQI of 32 (Good) across 365 monitored days. 2 days (0.5%) reached Unhealthy for Sensitive Groups or worse, 307 were Good, and the year's peak AQI was 155 (Unhealthy). Fine particulate matter (PM2.5) set the daily AQI on 365 of those days. The cleanest month of 2022 was May (median AQI 16, 0 days above 100) and the worst was September (median 54, 1 day above 100, peak 107).
- Good: 84.1%
- Moderate: 15.3%
- Unhealthy for Sensitive Groups: 0.3%
- Unhealthy or worse: 0.3%
Reduce Indoor Ozone in Billings
Today's main pollutant in Billings is ground-level ozone (AQI 21). 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
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How was Billings's air quality in 2022?
Good on a typical day: median AQI 32, with 2 days above AQI 100 out of 365 monitored — the 3rd cleanest of 6 years on record for the area.
- ✓Peak AQI in 2022: 155 (Unhealthy).
- ✓Fine particulate matter (PM2.5) was the main pollutant on 365 days.
- ✓Cleanest month: May; worst: September.
Frequently asked questions
What was the average AQI in Billings in 2022?▾
EPA's Air Quality System puts Billings's (Billings, MT) median daily AQI for 2022 at 32, which is Good. 2 days were Unhealthy for Sensitive Groups or worse and the year's highest AQI was 155.
Which month had the worst air quality in Billings in 2022?▾
The cleanest month of 2022 was May (median AQI 16, 0 days above 100) and the worst was September (median 54, 1 day above 100, peak 107).
Was 2022 a good or bad year for Billings's air?▾
Among the 6 years EPA has published for the area (2020–2025), 2022 ranks 3rd cleanest by days above AQI 100. 2022's median of 32 is below the area's typical annual median of 38.
Billings month by month in 2022
Billings air quality month by month, 2022 (Billings, MT, EPA AQS daily AQI)
| Month | Days monitored | Median AQI | Days above 100 | Peak AQI | Main pollutant |
|---|---|---|---|---|---|
| January | 31 | 31 | 0 | 59 | PM2.5 |
| February | 28 | 29 | 0 | 67 | PM2.5 |
| March | 31 | 26 | 0 | 51 | PM2.5 |
| April | 30 | 22 | 0 | 42 | PM2.5 |
| Maycleanest | 31 | 16 | 0 | 33 | PM2.5 |
| June | 30 | 24 | 0 | 51 | PM2.5 |
| July | 31 | 35 | 1 | 155 | PM2.5 |
| August | 31 | 38 | 0 | 57 | PM2.5 |
| Septemberworst | 30 | 54 | 1 | 107 | PM2.5 |
| October | 31 | 42 | 0 | 63 | PM2.5 |
| November | 30 | 37 | 0 | 56 | PM2.5 |
| December | 31 | 37 | 0 | 74 | PM2.5 |
How 2022 compares
Among the 6 years EPA has published for the area (2020–2025), 2022 ranks 3rd cleanest by days above AQI 100.
2022's median of 32 is below the area's typical annual median of 38.
Activity-specific thresholds: running, cycling, kids' sports.
Right now in Billings
The latest EPA AirNow observation puts Billings's AQI at 21 (O3). The figures above are multi-year annual statistics, not today's reading.
View current Billings air quality →Source: EPA Air Quality System (AQS) pre-generated Daily AQI by CBSA files — daily AQI by CBSA (Billings, MT), 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.