Median AQI
24
Good
Nevada · County air quality · 2025
Nye County, Nevada
Median AQI 24 (Good). 91.2% of monitored days rated Good, direct from EPA Air Quality System stations.
- 24
- Median AQI
- 91.2%
- Good-air days
- 0
- Unhealthy days
- 79%
- Cleaner than US counties
The verdict
According to EPA Air Quality System monitoring data, Nye County's air is good on balance, cleaner than most US counties, a median AQI of 24 with 91.2% of 181 monitored days in the Good band, driven mainly by PM10.
- 24
- median AQI · Good
- 91.2%
- days rated Good
- PM10
- main pollutant
- 79%
- cleaner than US counties
Not one day crossed into the Unhealthy tier; the worst single reading was AQI 128.
Data updated July 2026
- Good · 165 d · 91.2%
- Moderate · 15 d · 8.3%
- USG · 1 d · 0.6%
How did Nye County's air break down in 2025?
Across 181 monitored days, 165 fell in the Good band (AQI 0–50) and 0 reached Unhealthy or worse. The worst single day peaked at AQI 128 (USG).
EPA AQS →Air quality data from EPA Air Quality System (2025). 181 days monitored. Median AQI: 24 (Good).
Insights: Nye County, Nevada. EPA monitors recorded a median Air Quality Index of 24 across 181 measured days in 2025, earning a Good classification and a Excellent health grade. Of those days, 165 (91%) fell in the Good band (AQI 0–50), 15 (8%) registered Moderate readings, and 1 (1%) reached Unhealthy for Sensitive Groups. The 90th-percentile AQI settled at 45, while the worst single-day peak hit 128 (USG). Residents averaged about 27.3 clean-air days per 30-day window during the monitoring year.
The full pollutant mix ranks as PM10 (181 days). Across the 2020–2025 trend window, good days shifted by -178 and the median AQI moved +3 points, placing the multi-year trajectory at stable. The worst single reading over the 2020–2025 window was AQI 128, usg but never Unhealthy. Nearby counties show comparable readings: Carson City (79.3% good, AQI 45); Churchill (81.0% good, AQI 43); Clark (25.6% good, AQI 64); Douglas (90.9% good, AQI 22); Elko (90.8% good, AQI 19); Lyon (83.9% good, AQI 44).
Air Quality Summary
Good Days
91.2%
165 of 181 monitored days
16.2pp vs 75% target
Max AQI Recorded
128
USG
Health Grade
Excellent
90th-pct AQI 45
Nye County, Good days share 91.2%
National avg
Share of monitored days at AQI 0-50 (Good band).
Nye 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 181 monitored days across EPA AQI categories.
Good
165
91%
Moderate
15
8%
USG
1
1%
Unhealthy
0
0%
Very Unhealthy
0
0%
Hazardous
0
0%
Pollutant Breakdown
Days where each pollutant was the primary driver of AQI readings in Nye County.
- PM10 · 181 days · 100.0%
Health Impact Assessment
Excellent
Nye County's air quality is rated Excellent based on 91.2% good air days. No unhealthy air days were recorded in 2025.
Air quality was acceptable on 91.2% 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 PM10, driving AQI on 181 of 181 monitored days.
5-Year Air Quality Trend
Air quality is stable in Nye County. Best year: 2020 (343 good days).
| Year | Good | Moderate | USG | Unhealthy | Median AQI | Max AQI |
|---|---|---|---|---|---|---|
| 2020 | 343 | 20 | 1 | 2 | 21 | 200 |
| 2021 | 336 | 28 | 1 | 0 | 23 | 105 |
| 2022 | 306 | 41 | 6 | 4 | 22 | 294 |
| 2023 | 339 | 20 | 6 | 0 | 19 | 147 |
| 2024 | 319 | 44 | 2 | 0 | 31 | 247 |
| 2025 | 165 | 15 | 1 | 0 | 24 | 128 |
How does Nye County compare?
How Nye County compares
Good-day share better than US avg
Nye County 91.2%
Carson City County, Nevada 79.3%
US average 76.5%
Median AQI better than US avg
Nye County 24
Carson City County, Nevada 45
US average 38
Unhealthy days / yr about average
Nye County 0
Carson City County, Nevada 0
US average 0
Other Counties in Nevada
Air quality comparison for nearby counties in Nevada.
Counties with Similar Air Quality
Counties across the US with a similar median AQI to Nye 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 Nye County's air means for you
The air here stays in the breathable range year-round, with PM10 the main thing to watch.
- Sensitive groups (asthma, heart conditions, children, older adults) should check the AQI on high-PM10 days, the guide explains what a median of 24 means for exposure. Health guidance
- See how Nye County ranks against every monitored U.S. county on Good-day share. County rankings
- Compare Nye County with its Nevada neighbours before drawing a conclusion about the region. All of Nevada
Based on 181 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 Nye County, Nevada? ▼
Nye County has a median Air Quality Index (AQI) of 24, rated "Good." 91.2% of monitored days (165 out of 181) had good air quality in 2025.
What is the main pollutant in Nye County? ▼
The primary pollutant in Nye County is Coarse Particles (PM10), which was the main AQI driver on 181 days (100% of monitored days). Irritates airways and can aggravate asthma and bronchitis.
How many unhealthy air days does Nye County have? ▼
In 2025, Nye County recorded 0 unhealthy air days (0 Unhealthy, 0 Very Unhealthy, 0 Hazardous). The maximum AQI reached 128.
Is the air quality in Nye County getting better or worse? ▼
Air quality in Nye County is stable based on 5-year trends (2020-2025). Best year: 2020 with 343 good days. Worst year: 2025 with 165 good days.
What does AQI 24 mean for health? ▼
Nye 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 Nye County compare to other counties in Nevada? ▼
Nye County has 91.2% good air days. Nearby counties in Nevada: Carson City (79.3% good), Churchill (81.0% good), Clark (25.6% good), Douglas (90.9% good), Elko (90.8% good), Lyon (83.9% good).
What is the 90th percentile AQI in Nye County? ▼
The 90th percentile AQI for Nye County is 45, meaning 90% of monitored days had an AQI at or below this level. The maximum AQI recorded was 128 (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.