Metro area air quality · 2025

Carson City, NV

Median AQI 45 (Good). 79.3% of monitored days rated Good across this metro's EPA monitoring network.

45
Median AQI
79.3%
Good-air days
0
Unhealthy days
61%
Cleaner than US metros

Aggregated from EPA Air Quality System (2025), 179 monitored days. EPA AQS →

The verdict

The Carson City, NV metro runs good on the EPA scale, cleaner than the median US metro, a median AQI of 45 with 79.3% of 179 monitored days in the Good band.

45
median AQI · Good
79.3%
days rated Good
61%
cleaner than US metros
80
worst single reading

No day crossed into the Unhealthy tier across the metro's monitors in 2025.

Insights: Carson City, NV metro. Aggregated EPA AQS monitors across this Core-Based Statistical Area logged a median Air Quality Index of 45 over 179 measured days in 2025, which corresponds to a Good band and a Good metro-wide health grade. The monitored-day split lands at 142 Good days (79%), 37 Moderate (21%), and 0 Unhealthy-for-Sensitive-Groups (0%). The 90th-percentile AQI finished at 56 while the highest single-day reading hit 80 (Moderate). Metro residents averaged roughly 23.8 clean-air days per 30-day window across the reporting year.

Across the 2020–2025 trend window, good days shifted by -142 and the median AQI moved +3 points, which classifies the multi-year trajectory as stable. The metro avoided any Unhealthy-tier days entirely, an outcome that typically reflects favorable wind patterns, lower industrial density, or effective regional emission controls. Metros with comparable AQI profiles include Akron, OH (62.2% good, AQI 45); Clinton, IA (59.9% good, AQI 45); Davenport-Moline-Rock Island, IA-IL (58.4% good, AQI 45).

Air Quality Summary

Median AQI

45

Good

Good Days

79.3%

142 of 179 days

Max AQI

80

Moderate

Health Grade

Good

90th pct: 56

AQI Day Breakdown (2025)

Distribution of 179 monitored days across EPA AQI categories.

Good

142

79%

Moderate

37

21%

USG

0

0%

Unhealthy

0

0%

Very Unhealthy

0

0%

Hazardous

0

0%

Health Impact Assessment

Good

The Carson City, NV metro area's air quality is rated Good based on 79.3% good air days. No unhealthy air days were recorded in 2025.

Air quality is generally acceptable. Unusually sensitive people should monitor real-time conditions at AirNow.gov during high-pollution events.

How does the Carson City, NV metro compare?

How Carson City, NV compares

Good-day share better than US avg
Carson City, NV 79.3%
Akron, OH 62.2%
US average 71.3%
Median AQI worse than US avg
Carson City, NV 45
Akron, OH 45
US average 41
Unhealthy days / yr better than US avg
Carson City, NV 0
Akron, OH 0
US average 1

5-Year Air Quality Trend

Air quality is stable in the Carson City, NV metro. Best year: 2022 (290 good days).

Year Good Moderate Unhealthy Median AQI
2020 284 62 6 42
2021 273 64 12 42
2022 290 65 2 44
2023 236 126 0 47
2024 270 95 0 45
2025 142 37 0 45

Metros with Similar Air Quality

Metro areas across the US with a similar median AQI to Carson City, NV.

Akron, OH

AQI 45 · 62.2% good

45

Clinton, IA

AQI 45 · 59.9% good

45

Davenport-Moline-Rock Island, IA-IL

AQI 45 · 58.4% good

45

Española, NM

AQI 45 · 79.9% good

45

Gadsden, AL

AQI 45 · 63.5% good

45

Helena, MT

AQI 45 · 65.4% good

45

More Air Quality Data

Explore EPA air quality rankings and guides across U.S. metros and counties.

Cleanest Metro Areas

U.S. metros ranked by their share of Good air-quality days.

Worst Air Quality

Counties and metros with the most unhealthy air days.

All Metro Areas

Annual AQI by CBSA for every monitored U.S. metro area.

Best and Worst City Air

What drives urban air quality and how metro areas compare.

Air Quality Guides

Frequently Asked Questions

What is the air quality in the Carson City, NV metro area? ▼
The Carson City, NV metro area has a median Air Quality Index (AQI) of 45, rated "Good." 79.3% of monitored days (142 out of 179) had good air quality in 2025.
How many unhealthy air days does Carson City, NV have? ▼
In 2025, the Carson City, NV metro area recorded 0 unhealthy air days (0 Unhealthy, 0 Very Unhealthy, 0 Hazardous). The maximum AQI reached 80.
Is air quality in Carson City, NV getting better or worse? ▼
Air quality in the Carson City, NV metro is stable based on 5-year trends (2020-2025). Best year: 2022 with 290 good days. Worst year: 2025 with 142 good days.
What does AQI 45 mean for health? ▼
An AQI of 45 is "Good", air quality is satisfactory and poses little or no health risk. This is the best category on the EPA's AQI scale.
What is the 90th percentile AQI for Carson City, NV? ▼
The 90th percentile AQI for the Carson City, NV metro area is 56, meaning 90% of monitored days had an AQI at or below this level. The maximum AQI recorded was 80 (Moderate).
How does Carson City, NV compare to other metro areas? ▼
The Carson City, NV metro has 79.3% good air days. Similar metros: Akron, OH (62.2% good), Clinton, IA (59.9% good), Davenport-Moline-Rock Island, IA-IL (58.4% good).

Data Sources

Primary Source: U.S. Environmental Protection Agency (EPA), Air Quality System (AQS), Annual AQI by CBSA dataset, 2020–2025. See our methodology for how AQI, median, and coverage figures are computed.

Read our methodology , how this data is sourced, computed, and verified.

Source: U.S. EPA Air Quality System (AQS) Annual AQI by CBSA summary files (metro-level) · 2020–2025

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.