Fort Calhoun, Nebraska Air Quality
Fort Calhoun has a median AQI of 29, earning an air quality grade of A+ — excellent air quality that ranks better than 90% of US cities. Air quality has remained relatively stable over the past decade. Particulate matter (PM2.5) is the primary concern, often linked to vehicle traffic, industrial activity, and wildfire smoke. In 2025, Fort Calhoun recorded 209 good air quality days (84% of monitored days) and 1 unhealthy days.
Population: 1,173 • County: Washington
Current AQI
Quick Facts
| Current AQI | 35 — Good |
| Air Quality Grade | A+ |
| Median AQI (2025) | 29 |
| vs. U.S. Cities | Better than 90% |
| Primary Pollutant | PM2.5 |
| Unhealthy Days/Year | 1 |
| 10-Year Trend | → Stable |
| Data Source | EPA AQS (historical) · AirNow (live) |
Health Recommendation
Air quality is satisfactory, and air pollution poses little or no risk.
It's a great day to be active outside!
5-Day AQI Forecast
Last 90 Days
Current Pollutant Levels
Real-time data from EPA AirNow
Local Air Quality Context
Air quality data for Fort Calhoun is sourced from the Blair monitoring area, located approximately 9 miles from city center. This EPA-certified station continuously tracks particulate matter (PM2.5), the primary driver of air quality alerts in this area.
Fort Calhoun tends to see elevated PM2.5 readings during fall and winter months when temperature inversions trap pollutants near the surface. Wood burning, vehicle exhaust, and reduced wind speeds compound the effect. Residents with respiratory conditions should monitor forecasts closely between November and February.
AQI Trend (10 Years)
Air Quality Days by Year
Fort Calhoun Median AQI by Year
Annual EPA air quality data for Fort Calhoun — median AQI, day-category breakdown, and primary pollutant per year.
| Year | Median AQI | Good Days | Unhealthy Days | Max AQI | Primary Pollutant |
|---|---|---|---|---|---|
| 2025 | 29 | 209 | 1 | 132 | PM2.5 |
| 2024 | 34 | 268 | — | 81 | PM2.5 |
| 2023 | 33 | 258 | 4 | 154 | PM2.5 |
| 2022 | 19 | 280 | — | 64 | PM2.5 |
| 2021 | 37 | 83 | 1 | 125 | PM2.5 |
| 2020 | 31 | 93 | — | 75 | PM2.5 |
| 2019 | 34 | 95 | — | 78 | PM2.5 |
| 2018 | 39 | 86 | — | 95 | PM2.5 |
| 2017 | 35 | 91 | — | 68 | PM2.5 |
| 2016 | 32 | 96 | — | 66 | PM2.5 |
Source: EPA Air Quality System (AQS) annual summaries. "Unhealthy Days" includes Unhealthy for Sensitive Groups, Unhealthy, Very Unhealthy, and Hazardous categories.
2025 Air Quality Summary
Primary Pollutant Days (2025)
Days when each pollutant was the primary driver of AQI. Learn about pollutants →
Frequently Asked Questions About Fort Calhoun Air Quality
What is the air quality in Fort Calhoun today?
The current AQI in Fort Calhoun is 35, rated "Good". Air quality is good — outdoor activity is safe for everyone today. Air quality is satisfactory, and air pollution poses little or no risk.
Is air quality in Fort Calhoun getting better or worse?
Air quality in Fort Calhoun has been stable. The median AQI has dropped 3 points (from 32 in 2016 to 29 in 2025).
What is the most common air pollutant in Fort Calhoun?
PM2.5 is the primary air pollutant in Fort Calhoun, responsible for 248 days (100% of monitored days) in 2025. Particulate matter originates from vehicle exhaust, wildfires, construction, and industrial activity.
How many unhealthy air days does Fort Calhoun have per year?
In 2025, Fort Calhoun recorded 84% good air quality days (209 days) out of 248 monitored days. There were 1 Unhealthy for Sensitive Groups days and 0 Unhealthy days (AQI above 100). The highest single-day AQI recorded was 132.
What air quality grade does Fort Calhoun receive?
Fort Calhoun receives an air quality grade of A+, placing it better than 90% of US cities. This is based on a median AQI of 29 in 2025, with 209 good air quality days. The EPA monitors air quality in this area continuously using certified monitoring stations.
Air Quality Grade
Better than 90% of US cities
Nearby Cities
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National Rankings
See how Fort Calhoun compares to every other US city by air quality.
Best Air Quality Cities →All city rankingsRecommended Air Purifiers for Fort Calhoun
Fort Calhoun sees its worst PM2.5 during winter temperature inversions when particulates get trapped near ground level. A unit with True HEPA and an auto-mode sensor is most effective for responding to these spikes.
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