Greenwood, Nebraska Air Quality
Greenwood air quality today — the AQI, the main pollutant, and whether it’s safe to exercise outside right now
Greenwood, NE · Air quality right now
The air quality index in Greenwood, NE is 18 (Good) right now — safe for outdoor activity.
Is it safe to be outside in Greenwood today?
AQI 18 Yes — air quality is Good
Air is clean — great for outdoor activity.Main pollutant: OzoneObserved 4:00 AM CDT
Pollutants right now
- PM2.53.4 µg/m³fine particles — smoke, exhaust, soot
- PM103.4 µg/m³coarse particles — dust, pollen, ash
- Ozone32 µg/m³Main pollutantsmog — builds on hot, sunny days
- NO₂9.5 µg/m³nitrogen dioxide — traffic, combustion
ExerciseOK to run — no air-quality limits on outdoor exercise.
How to read Greenwood’s air quality
Guides: The AQI Scale, Explained · Air Quality Alerts, Decoded · How to Read a Wildfire Smoke Map · Why Wildfire Smoke Travels 1,000 Miles.
Air quality over time in Greenwood
Across the EPA’s county records from 2020 to 2025, Greenwood’s cleanest year was 2020 (median AQI 14) and its most polluted was 2021 (median AQI 19); the typical (median) day has held roughly steady since 2020.
| Year | Median AQI | Unhealthy+ | Main pollutant | USG | Moderate | Good |
|---|---|---|---|---|---|---|
| 2020 | 14 | 0 | PM10 | 0 | 12 | 346 |
| 2021 | 19 | 0 | PM10 | 0 | 6 | 345 |
| 2022 | 19 | 0 | PM10 | 0 | 19 | 337 |
| 2023 | 17 | 0 | PM10 | 0 | 10 | 344 |
| 2024 | 17 | 0 | PM10 | 0 | 15 | 259 |
| 2025 | 19 | 0 | PM10 | 0 | 14 | 325 |
“USG” is Unhealthy for Sensitive Groups (AQI 101–150); “Unhealthy+” combines the Unhealthy, Very Unhealthy, and Hazardous days. In 2024 the EPA tightened the annual fine-particle (PM2.5) standard to 9 µg/m³ from the previous 12 µg/m³, so counties near the old limit read worse against the new one. Source: EPA AQS annual summaries, 2020–2025.
Frequently asked
- What was the worst year for air quality in Greenwood?
- No day in Greenwood's county topped AQI 100 in the EPA's 2020–2025 records. The highest median AQI came in 2021, at 19.
- How many unhealthy air days does Greenwood have?
- None: across 2020–2025, no day in Greenwood's county had an AQI above 100 in the EPA's records (2032 days reported).
- What's the main air pollutant in Greenwood?
- PM10: it drove Greenwood's county AQI on the most days in every year of the EPA's 2020–2025 records.