Median AQI
33
Good
Nebraska · County air quality · 2025
Sarpy County, Nebraska
Median AQI 33 (Good). 77.1% of monitored days rated Good, direct from EPA Air Quality System stations.
- 33
- Median AQI
- 77.1%
- Good-air days
- 0
- Unhealthy days
- 44%
- Cleaner than US counties
The verdict
According to EPA Air Quality System monitoring data, Sarpy County's air is good on balance, more polluted than the median US county, a median AQI of 33 with 77.1% of 266 monitored days in the Good band, driven mainly by PM2.5.
- 33
- median AQI · Good
- 77.1%
- days rated Good
- PM2.5
- main pollutant
- 44%
- cleaner than US counties
Not one day crossed into the Unhealthy tier; the worst single reading was AQI 134.
Data updated July 2026
- Good · 205 d · 77.1%
- Moderate · 60 d · 22.6%
- USG · 1 d · 0.4%
How did Sarpy County's air break down in 2025?
Across 266 monitored days, 205 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). 266 days monitored. Median AQI: 33 (Good).
Insights: Sarpy County, Nebraska. EPA monitors recorded a median Air Quality Index of 33 across 266 measured days in 2025, earning a Good classification and a Good health grade. Of those days, 205 (77%) fell in the Good band (AQI 0–50), 60 (23%) registered Moderate readings, and 1 (0%) reached Unhealthy for Sensitive Groups. The 90th-percentile AQI settled at 60, while the worst single-day peak hit 134 (USG). Residents averaged about 23.1 clean-air days per 30-day window during the monitoring year.
The full pollutant mix ranks as PM2.5 (266 days). Across the 2020–2025 trend window, good days shifted by -22 and the median AQI moved -6 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 (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
77.1%
205 of 266 monitored days
2.1pp vs 75% target
Max AQI Recorded
134
USG
Health Grade
Good
90th-pct AQI 60
Sarpy County, Good days share 77.1%
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 266 monitored days across EPA AQI categories.
Good
205
77%
Moderate
60
23%
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 · 266 days · 100.0%
Health Impact Assessment
Good
Sarpy County's air quality is rated Good based on 77.1% good air days. No unhealthy air days were recorded in 2025.
Air quality was acceptable on 77.1% of monitored days in 2025, with a median AQI of 33. Unusually sensitive people can check real-time conditions at AirNow.gov during high-pollution events.
The dominant pollutant is PM2.5, driving AQI on 266 of 266 monitored days.
5-Year Air Quality Trend
Air quality is improving in Sarpy County. Best year: 2022 (269 good 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 | 205 | 60 | 1 | 0 | 33 | 134 |
How does Sarpy County compare?
How Sarpy County compares
Good-day share better than US avg
Sarpy County 77.1%
Cass County, Nebraska 96.5%
US average 76.5%
Median AQI better than US avg
Sarpy County 33
Cass County, Nebraska 20
US average 38
Unhealthy days / yr about average
Sarpy 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 Sarpy County.
Ascension County, Louisiana
AQI 33 · 94.1% good
Athens County, Ohio
AQI 33 · 80.3% good
Brazoria County, Texas
AQI 33 · 84.8% good
Bristol City County, Virginia
AQI 33 · 78.3% good
Carter County, Oklahoma
AQI 33 · 80.9% good
Codington County, South Dakota
AQI 33 · 82.1% good
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 33 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 266 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 Sarpy County, Nebraska? ▼
Sarpy County has a median Air Quality Index (AQI) of 33, rated "Good." 77.1% of monitored days (205 out of 266) 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 266 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 based on 5-year trends (2020-2025). Best year: 2022 with 269 good days. Worst year: 2025 with 205 good days.
What does AQI 33 mean for health? ▼
Sarpy County's median AQI of 33 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 Sarpy County compare to other counties in Nebraska? ▼
Sarpy County has 77.1% 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 Sarpy County? ▼
The 90th percentile AQI for Sarpy County is 60, 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.
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.