Median AQI
24
Good
Nebraska · County air quality · 2025
Scotts Bluff County, Nebraska
Median AQI 24 (Good). 95.2% of monitored days rated Good, direct from EPA Air Quality System stations.
- 24
- Median AQI
- 95.2%
- Good-air days
- 0
- Unhealthy days
- 90%
- Cleaner than US counties
The verdict
According to EPA Air Quality System monitoring data, Scotts Bluff County's air is good on balance, among the cleanest 10% of US counties, a median AQI of 24 with 95.2% of 249 monitored days in the Good band, driven mainly by PM2.5.
- 24
- median AQI · Good
- 95.2%
- days rated Good
- PM2.5
- main pollutant
- 90%
- cleaner than US counties
Not one day crossed into the Unhealthy tier; the worst single reading was AQI 64.
Data updated July 2026
- Good · 237 d · 95.2%
- Moderate · 12 d · 4.8%
How did Scotts Bluff County's air break down in 2025?
Across 249 monitored days, 237 fell in the Good band (AQI 0–50) and 0 reached Unhealthy or worse. The worst single day peaked at AQI 64 (Moderate).
EPA AQS →Air quality data from EPA Air Quality System (2025). 249 days monitored. Median AQI: 24 (Good).
Insights: Scotts Bluff County, Nebraska. EPA monitors recorded a median Air Quality Index of 24 across 249 measured days in 2025, earning a Good classification and a Excellent health grade. Of those days, 237 (95%) fell in the Good band (AQI 0–50), 12 (5%) registered Moderate readings, and 0 (0%) reached Unhealthy for Sensitive Groups. The 90th-percentile AQI settled at 44, while the worst single-day peak hit 64 (Moderate). Residents averaged about 28.6 clean-air days per 30-day window during the monitoring year.
The full pollutant mix ranks as PM2.5 (249 days). Across the 2020–2025 trend window, good days shifted by +67 and the median AQI moved -12 points, placing the multi-year trajectory at improving. The worst single reading over the 2020–2025 window was AQI 64, moderate but never Unhealthy. Nearby counties show comparable readings: Cass (96.5% good, AQI 20); Douglas (66.8% good, AQI 44); Gage (74.0% good, AQI 36); Hall (80.2% good, AQI 37); Knox (89.3% good, AQI 39); Lancaster (77.7% good, AQI 36).
Air Quality Summary
Good Days
95.2%
237 of 249 monitored days
20.2pp vs 75% target
Max AQI Recorded
64
Moderate
Health Grade
Excellent
90th-pct AQI 44
Scotts Bluff County, Good days share 95.2%
National avg
Share of monitored days at AQI 0-50 (Good band).
Scotts Bluff County, Unhealthy-or-worse share 0.0%
National avg
Share of monitored days above AQI 150 (Unhealthy or worse). Bar maxes at 10% (worst-county ceiling).
AQI Day Breakdown (2025)
Distribution of 249 monitored days across EPA AQI categories.
Good
237
95%
Moderate
12
5%
USG
0
0%
Unhealthy
0
0%
Very Unhealthy
0
0%
Hazardous
0
0%
Pollutant Breakdown
Days where each pollutant was the primary driver of AQI readings in Scotts Bluff County.
- PM2.5 · 249 days · 100.0%
Health Impact Assessment
Excellent
Scotts Bluff County's air quality is rated Excellent based on 95.2% good air days. No unhealthy air days were recorded in 2025.
Air quality was acceptable on 95.2% of monitored days in 2025, with a median AQI of 24. Unusually sensitive people can check real-time conditions at AirNow.gov during high-pollution events.
The dominant pollutant is PM2.5, driving AQI on 249 of 249 monitored days.
5-Year Air Quality Trend
Air quality is improving in Scotts Bluff County. Best year: 2022 (331 good days).
| Year | Good | Moderate | USG | Unhealthy | Median AQI | Max AQI |
|---|---|---|---|---|---|---|
| 2020 | 170 | 106 | 2 | 0 | 36 | 122 |
| 2021 | 294 | 38 | 0 | 0 | 21 | 82 |
| 2022 | 331 | 8 | 0 | 0 | 16 | 79 |
| 2023 | 298 | 44 | 0 | 0 | 21 | 225 |
| 2024 | 284 | 36 | 0 | 0 | 16 | 89 |
| 2025 | 237 | 12 | 0 | 0 | 24 | 64 |
How does Scotts Bluff County compare?
How Scotts Bluff County compares
Good-day share better than US avg
Scotts Bluff County 95.2%
Cass County, Nebraska 96.5%
US average 76.5%
Median AQI better than US avg
Scotts Bluff County 24
Cass County, Nebraska 20
US average 38
Unhealthy days / yr about average
Scotts Bluff County 0
Cass County, Nebraska 0
US average 0
Other Counties in Nebraska
Air quality comparison for nearby counties in Nebraska.
Counties with Similar Air Quality
Counties across the US with a similar median AQI to Scotts Bluff County.
Alamosa County, Colorado
AQI 24 · 90.8% good
Anchorage County, Alaska
AQI 24 · 80.8% good
Charlton County, Georgia
AQI 24 · 79.0% good
Crook County, Oregon
AQI 24 · 80.7% good
Culberson County, Texas
AQI 24 · 80.0% good
Kootenai County, Idaho
AQI 24 · 88.4% good
What Scotts Bluff County's air means for you
The air here stays in the breathable range year-round, with PM2.5 the main thing to watch.
- Sensitive groups (asthma, heart conditions, children, older adults) should check the AQI on high-PM2.5 days, the guide explains what a median of 24 means for exposure. Health guidance
- See how Scotts Bluff County ranks against every monitored U.S. county on Good-day share. County rankings
- Compare Scotts Bluff County with its Nebraska neighbours before drawing a conclusion about the region. All of Nebraska
Based on 249 EPA-monitored days in 2025; figures reflect only days the monitors reported. Source: EPA Air Quality System annual summaries.
More Air Quality Data
Air Quality Guides
Frequently Asked Questions
What is the air quality in Scotts Bluff County, Nebraska? ▼
Scotts Bluff County has a median Air Quality Index (AQI) of 24, rated "Good." 95.2% of monitored days (237 out of 249) had good air quality in 2025.
What is the main pollutant in Scotts Bluff County? ▼
The primary pollutant in Scotts Bluff County is Fine Particles (PM2.5), which was the main AQI driver on 249 days (100% of monitored days). Penetrates deep into lungs and bloodstream. Linked to heart disease and premature death.
How many unhealthy air days does Scotts Bluff County have? ▼
In 2025, Scotts Bluff County recorded 0 unhealthy air days (0 Unhealthy, 0 Very Unhealthy, 0 Hazardous). The maximum AQI reached 64.
Is the air quality in Scotts Bluff County getting better or worse? ▼
Air quality in Scotts Bluff County is improving based on 5-year trends (2020-2025). Best year: 2022 with 331 good days. Worst year: 2020 with 170 good days.
What does AQI 24 mean for health? ▼
Scotts Bluff County's median AQI of 24 falls in the "Good" category. See the <a href="/guides/understanding-aqi" class="underline">AQI category guide</a> for what each range means for health.
How does Scotts Bluff County compare to other counties in Nebraska? ▼
Scotts Bluff County has 95.2% good air days. Nearby counties in Nebraska: Cass (96.5% good), Douglas (66.8% good), Gage (74.0% good), Hall (80.2% good), Knox (89.3% good), Lancaster (77.7% good).
What is the 90th percentile AQI in Scotts Bluff County? ▼
The 90th percentile AQI for Scotts Bluff County is 44, meaning 90% of monitored days had an AQI at or below this level. The maximum AQI recorded was 64 (Moderate).
Data Sources
Primary Source: U.S. Environmental Protection Agency (EPA), Air Quality System (AQS), Annual AQI by County dataset, 2020–2025 (aqs.epa.gov). For current conditions (not shown here — this page is historical annual data), see EPA AirNow (airnow.gov). See our methodology for how AQI, median, and coverage figures are computed.
Informational only, not professional advice. Data from EPA AQS. See our disclaimer.
Every figure on PlainAir is rendered directly from EPA AQS air-quality monitoring data, no number is typed in by an editor. This page draws directly on EPA AQS air-quality monitoring data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.