Median AQI
23
Good
Nebraska · County air quality · 2025
Scotts Bluff County, Nebraska
Median AQI 23 (Good). 95.8% of monitored days rated Good, direct from EPA Air Quality System stations.
- 23
- Median AQI
- 95.8%
- Good-air days
- 0
- Unhealthy days
- 94%
- Cleaner than US counties
Scotts Bluff County's 2025 annual median AQI is 23 (Good), with 95.8% Good days
According to the U.S. EPA Air Quality System, Scotts Bluff County, Nebraska posted a 2025 median AQI of 23 (Good) across 308 monitored days, with 95.8% rated Good and 0 unhealthy or worse. This is an annual comparison, not today's advisory.
Data source EPA Air Quality System (AQS)
- Cleaner than US
- Scotts Bluff County's 95.8% Good-day share places it cleaner than 94% of US counties in 2025.
- Closest median-AQI peer
- Deschutes County (89.3% Good, median AQI 23) is the closest nationwide median-AQI peer to Scotts Bluff County.
- 2020–2025 trend
- Scotts Bluff County's floor-qualifying Good-day share is improving from 2020 to 2025 (61.2% → 95.8%).
- Median AQI
- Median AQI: 23
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 23 with 95.8% of 308 monitored days in the Good band, driven mainly by PM2.5.
- 23
- median AQI · Good
- 95.8%
- days rated Good
- PM2.5
- main pollutant
- 94%
- cleaner than US counties
Not one day crossed into the Unhealthy tier; the worst single reading was AQI 64.
Annual release change
What changed in the 2025 EPA annual release
- Scotts Bluff County's Good-day share rose from 88.8% to 95.8% between the 2024 and 2025 EPA annual releases, a change of +7.0 percentage points.
- Scotts Bluff County's peak single-day AQI fell from 89 to 64 between the 2024 and 2025 EPA annual releases, a change of -25 points.
- Scotts Bluff County's median AQI rose from 16 to 23 between the 2024 and 2025 EPA annual releases, a change of +7 points.
Data updated August 2026
- Good · 295 d · 95.8%
- Moderate · 13 d · 4.2%
How did Scotts Bluff County's air break down in 2025?
Across 308 monitored days, 295 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). 308 days monitored. Median AQI: 23 (Good).
Insights: Scotts Bluff County, Nebraska. EPA monitors recorded a median Air Quality Index of 23 across 308 measured days in 2025, earning a Good classification and a Excellent health grade. Of those days, 295 (96%) fell in the Good band (AQI 0–50), 13 (4%) registered Moderate readings, and 0 (0%) reached Unhealthy for Sensitive Groups. The 90th-percentile AQI settled at 42, while the worst single-day peak hit 64 (Moderate). Residents averaged about 28.7 clean-air days per 30-day window during the monitoring year.
The full pollutant mix ranks as PM2.5 (308 days). Across the 2020–2025 trend window, the share of monitored days rated Good shifted by +34.6 points (measured against 278 monitored days in 2020 and 308 in 2025, so raw day counts are not comparable) and the median AQI moved -13 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 (95.9% good, AQI 19); Douglas (71.0% good, AQI 42); Gage (75.8% good, AQI 34); Hall (82.5% good, AQI 34); Knox (92.0% good, AQI 36); Lancaster (85.4% good, AQI 37).
Air Quality Summary
Good Days
95.8%
295 of 308 monitored days
20.8pp vs 75% target
Max AQI Recorded
64
Moderate
Health Grade
Excellent
90th-pct AQI 42
Scotts Bluff County, Good days share 95.8%
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 308 monitored days across EPA AQI categories.
Good
295
96%
Moderate
13
4%
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 · 308 days · 100.0%
Health Impact Assessment
Excellent
Scotts Bluff County's air quality is rated Excellent based on 95.8% good air days. No unhealthy air days were recorded in 2025.
Air quality was acceptable on 95.8% of monitored days in 2025, with a median AQI of 23. Unusually sensitive people can check real-time conditions at AirNow.gov during high-pollution events.
The dominant pollutant is PM2.5, driving AQI on 308 of 308 monitored days.
5-Year Air Quality Trend
Air quality is improving in Scotts Bluff County. Highest Good-day share: 2022 (97.6%, 331 of 339 monitored 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 | 295 | 13 | 0 | 0 | 23 | 64 |
How does Scotts Bluff County compare?
How Scotts Bluff County compares
Good-day share better than typical
Scotts Bluff County 95.8%
Deschutes County, Oregon 89.3%
Typical US county 76.0%
Median AQI better than typical
Scotts Bluff County 23
Deschutes County, Oregon 23
Typical US county 39
Unhealthy days / yr better than typical
Scotts Bluff County 0
Deschutes County, Oregon 1
Typical US county 1
Counties with a similar median AQI
Nationwide peers within about the same annual median AQI as Scotts Bluff County (23), not geographic neighbors.
Deschutes County, Oregon
Median AQI 23 · 89.3% Good-day share
Franklin County, Washington
Median AQI 23 · 86.7% Good-day share
Fremont County, Colorado
Median AQI 23 · 93.4% Good-day share
Glacier County, Montana
Median AQI 23 · 91.7% Good-day share
Juneau County, Alaska
Median AQI 23 · 84.3% Good-day share
Mason County, Washington
Median AQI 23 · 90.4% Good-day share
Same primary pollutant: PM2.5
PM2.5 led the AQI on the most monitored days here. These peers share that driver and the closest Good-day share (a second relationship type beyond median-AQI neighbors).
Kitsap County, Washington
95.5% Good-day share · median AQI 22
Franklin County, Idaho
96.3% Good-day share · median AQI 21
Washakie County, Wyoming
96.3% Good-day share · median AQI 8
Blaine County, Idaho
96.6% Good-day share · median AQI 17
Beaverhead County, Montana
94.7% Good-day share · median AQI 13
Teton County, Montana
97.1% Good-day share · median AQI 12
Nebraska counties on the map
Geographic containment only, other monitored counties in Nebraska, independent of AQI or pollutant match.
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 23 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 308 EPA-monitored days in 2025; figures reflect only days the monitors reported. Source: EPA Air Quality System annual summaries.
Keep exploring the annual AQI record
Air-quality reading list
Frequently Asked Questions
What is the air quality in Scotts Bluff County, Nebraska? ▼
Scotts Bluff County has a median Air Quality Index (AQI) of 23, rated "Good." 95.8% of monitored days (295 out of 308) 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 308 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 across floor-qualifying years (2020-2025); years with fewer than 100 monitored days are excluded from that direction. Highest qualifying Good-day share: 2022 at 97.6% (331 of 339 days). Lowest qualifying Good-day share: 2020 at 61.2% (170 of 278 days).
What does AQI 23 mean for health? ▼
Scotts Bluff County's median AQI of 23 falls in the "Good" category. See the AQI category guide for what each range means for health.
How does Scotts Bluff County compare to other counties in Nebraska? ▼
Scotts Bluff County has 95.8% good air days. Nearby counties in Nebraska: Cass (95.9% good), Douglas (71.0% good), Gage (75.8% good), Hall (82.5% good), Knox (92.0% good), Lancaster (85.4% good).
What is the 90th percentile AQI in Scotts Bluff County? ▼
The 90th percentile AQI for Scotts Bluff County is 42, 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. Spotted a figure that looks wrong? Report a correction.
Source: U.S. EPA Air Quality System (AQS) Annual AQI by county summary files for Scotts Bluff County, Nebraska · 2020–2025
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Every figure on PlainAirData 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.