Median AQI
32
Good
Nebraska · County air quality · 2025
Sarpy County, Nebraska
Median AQI 32 (Good). 78.8% of monitored days rated Good, direct from EPA Air Quality System stations.
- 32
- Median AQI
- 78.8%
- Good-air days
- 0
- Unhealthy days
- 53%
- Cleaner than US counties
Sarpy County's 2025 annual median AQI is 32 (Good), with 78.8% Good days
According to the U.S. EPA Air Quality System, Sarpy County, Nebraska posted a 2025 median AQI of 32 (Good) across 353 monitored days, with 78.8% 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
- Sarpy County's 78.8% Good-day share places it cleaner than 53% of US counties in 2025.
- Closest median-AQI peer
- Aroostook County (83.3% Good, median AQI 32) is the closest nationwide median-AQI peer to Sarpy County.
- 2020–2025 trend
- Sarpy County's floor-qualifying Good-day share is improving from 2020 to 2025 (71.8% → 78.8%).
- Median AQI
- Median AQI: 32
The verdict
According to EPA Air Quality System monitoring data, Sarpy County's air is good on balance, cleaner than the median US county, a median AQI of 32 with 78.8% of 353 monitored days in the Good band, driven mainly by PM2.5.
- 32
- median AQI · Good
- 78.8%
- days rated Good
- PM2.5
- main pollutant
- 53%
- cleaner than US counties
Not one day crossed into the Unhealthy tier; the worst single reading was AQI 134.
Annual release change
What changed in the 2025 EPA annual release
- Sarpy County's Good-day share rose from 70.1% to 78.8% between the 2024 and 2025 EPA annual releases, a change of +8.6 percentage points.
- Sarpy County's peak single-day AQI rose from 110 to 134 between the 2024 and 2025 EPA annual releases, a change of +24 points.
- Sarpy County's median AQI fell from 37 to 32 between the 2024 and 2025 EPA annual releases, a change of -5 points.
Data updated August 2026
- Good · 278 d · 78.8%
- Moderate · 74 d · 21.0%
- USG · 1 d · 0.3%
How did Sarpy County's air break down in 2025?
Across 353 monitored days, 278 fell in the Good band (AQI 0–50) and 0 reached Unhealthy or worse. The worst single day peaked at AQI 134 (USG).
EPA AQS →Air quality data from EPA Air Quality System (2025). 353 days monitored. Median AQI: 32 (Good).
Insights: Sarpy County, Nebraska. EPA monitors recorded a median Air Quality Index of 32 across 353 measured days in 2025, earning a Good classification and a Good health grade. Of those days, 278 (79%) fell in the Good band (AQI 0–50), 74 (21%) registered Moderate readings, and 1 (0%) reached Unhealthy for Sensitive Groups. The 90th-percentile AQI settled at 56, while the worst single-day peak hit 134 (USG). Residents averaged about 23.6 clean-air days per 30-day window during the monitoring year.
The full pollutant mix ranks as PM2.5 (353 days). Across the 2020–2025 trend window, the share of monitored days rated Good shifted by +6.9 points (measured against 316 monitored days in 2020 and 353 in 2025, so raw day counts are not comparable) and the median AQI moved -7 points, placing the multi-year trajectory at improving. The worst single reading over the 2020–2025 window was AQI 134, usg 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
78.8%
278 of 353 monitored days
3.8pp vs 75% target
Max AQI Recorded
134
USG
Health Grade
Good
90th-pct AQI 56
Sarpy County, Good days share 78.8%
National avg
Share of monitored days at AQI 0-50 (Good band).
Sarpy 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 353 monitored days across EPA AQI categories.
Good
278
79%
Moderate
74
21%
USG
1
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 Sarpy County.
- PM2.5 · 353 days · 100.0%
Health Impact Assessment
Good
Sarpy County's air quality is rated Good based on 78.8% good air days. No unhealthy air days were recorded in 2025.
Air quality was acceptable on 78.8% of monitored days in 2025, with a median AQI of 32. Unusually sensitive people can check real-time conditions at AirNow.gov during high-pollution events.
The dominant pollutant is PM2.5, driving AQI on 353 of 353 monitored days.
5-Year Air Quality Trend
Air quality is improving in Sarpy County. Highest Good-day share: 2022 (81.3%, 269 of 331 monitored days).
| Year | Good | Moderate | USG | Unhealthy | Median AQI | Max AQI |
|---|---|---|---|---|---|---|
| 2020 | 227 | 87 | 2 | 0 | 39 | 149 |
| 2021 | 226 | 108 | 2 | 0 | 41 | 120 |
| 2022 | 269 | 62 | 0 | 0 | 32 | 94 |
| 2023 | 230 | 98 | 1 | 1 | 37 | 152 |
| 2024 | 244 | 103 | 1 | 0 | 37 | 110 |
| 2025 | 278 | 74 | 1 | 0 | 32 | 134 |
How does Sarpy County compare?
How Sarpy County compares
Good-day share better than typical
Sarpy County 78.8%
Aroostook County, Maine 83.3%
Typical US county 76.0%
Median AQI better than typical
Sarpy County 32
Aroostook County, Maine 32
Typical US county 39
Unhealthy days / yr better than typical
Sarpy County 0
Aroostook County, Maine 0
Typical US county 1
Counties with a similar median AQI
Nationwide peers within about the same annual median AQI as Sarpy County (32), not geographic neighbors.
Aroostook County, Maine
Median AQI 32 · 83.3% Good-day share
Belknap County, New Hampshire
Median AQI 32 · 88.8% Good-day share
Carter County, Oklahoma
Median AQI 32 · 81.6% Good-day share
Del Norte County, California
Median AQI 32 · 81.8% Good-day share
Hawaii County, Hawaii
Median AQI 32 · 86.0% Good-day share
Macon County, North Carolina
Median AQI 32 · 96.5% 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).
Nassau County, New York
78.8% Good-day share · median AQI 29
Jackson County, South Dakota
78.6% Good-day share · median AQI 43
Morgan County, Alabama
78.9% Good-day share · median AQI 41
Richmond City County, Virginia
78.9% Good-day share · median AQI 36
Beltrami County, Minnesota
79.1% Good-day share · median AQI 36
Anchorage County, Alaska
79.2% Good-day share · median AQI 26
Nebraska counties on the map
Geographic containment only, other monitored counties in Nebraska, independent of AQI or pollutant match.
What Sarpy 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 32 means for exposure. Health guidance
- See how Sarpy County ranks against every monitored U.S. county on Good-day share. County rankings
- Compare Sarpy County with its Nebraska neighbours before drawing a conclusion about the region. All of Nebraska
Based on 353 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 Sarpy County, Nebraska? ▼
Sarpy County has a median Air Quality Index (AQI) of 32, rated "Good." 78.8% of monitored days (278 out of 353) had good air quality in 2025.
What is the main pollutant in Sarpy County? ▼
The primary pollutant in Sarpy County is Fine Particles (PM2.5), which was the main AQI driver on 353 days (100% of monitored days). Penetrates deep into lungs and bloodstream. Linked to heart disease and premature death.
How many unhealthy air days does Sarpy County have? ▼
In 2025, Sarpy County recorded 0 unhealthy air days (0 Unhealthy, 0 Very Unhealthy, 0 Hazardous). The maximum AQI reached 134.
Is the air quality in Sarpy County getting better or worse? ▼
Air quality in Sarpy 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 81.3% (269 of 331 days). Lowest qualifying Good-day share: 2021 at 67.3% (226 of 336 days).
What does AQI 32 mean for health? ▼
Sarpy County's median AQI of 32 falls in the "Good" category. See the AQI category guide for what each range means for health.
How does Sarpy County compare to other counties in Nebraska? ▼
Sarpy County has 78.8% 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 Sarpy County? ▼
The 90th percentile AQI for Sarpy County is 56, meaning 90% of monitored days had an AQI at or below this level. The maximum AQI recorded was 134 (USG).
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 Sarpy 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.