Metro area air quality · 2024

Gardnerville Ranchos, NV

Median AQI 22 (Good). 90.1% of monitored days rated Good across this metro's EPA monitoring network.

22
Median AQI
90.1%
Good-air days
0
Unhealthy days
85%
Cleaner than US metros

Aggregated from EPA Air Quality System (2024), 342 monitored days. EPA AQS → · NOAA →

Insights: Gardnerville Ranchos, NV metro. Aggregated EPA AQS monitors across this Core-Based Statistical Area logged a median Air Quality Index of 22 over 342 measured days in 2024, which corresponds to a Good band and a Excellent metro-wide health grade. The monitored-day split lands at 308 Good days (90%), 34 Moderate (10%), and 0 Unhealthy-for-Sensitive-Groups (0%). The 90th-percentile AQI finished at 50 while the highest single-day reading hit 76 (Moderate). Metro residents averaged roughly 27.0 clean-air days per 30-day window across the reporting year.

Across the 2020–2024 trend window, good days shifted by +22 and the median AQI moved +0 points, which classifies the multi-year trajectory as improving. 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 Centralia, WA (93.3% good, AQI 22); Longview, WA (95.4% good, AQI 22); Elko, NV (87.1% good, AQI 23).

Air Quality Summary

Median AQI

22

Good

Good Days

90.1%

308 of 342 days

Max AQI

76

Moderate

Health Grade

Excellent

90th pct: 50

AQI Day Breakdown (2024)

Distribution of 342 monitored days across EPA AQI categories.

Good

308

90%

Moderate

34

10%

USG

0

0%

Unhealthy

0

0%

Very Unhealthy

0

0%

Hazardous

0

0%

Health Impact Assessment

Excellent

The Gardnerville Ranchos, NV metro area's air quality is rated Excellent based on 90.1% good air days. No unhealthy air days were recorded in 2024.

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

How does the Gardnerville Ranchos, NV metro compare?

How Gardnerville Ranchos, NV compares

Good-day share better than US avg
Gardnerville Ranchos, NV 90.1%
Centralia, WA 93.3%
US average 70.2%
Median AQI better than US avg
Gardnerville Ranchos, NV 22
Centralia, WA 22
US average 41
Unhealthy days / yr better than US avg
Gardnerville Ranchos, NV 0
Centralia, WA 0
US average 1

5-Year Air Quality Trend

Air quality is improving in the Gardnerville Ranchos, NV metro. Best year: 2024 (308 good days).

Year Good Moderate Unhealthy Median AQI
2020 286 63 7 22
2021 279 53 20 24
2022 295 55 5 20
2023 296 63 0 28
2024 308 34 0 22

Metros with Similar Air Quality

Metro areas across the US with a similar median AQI to Gardnerville Ranchos, NV.

Centralia, WA

AQI 22 · 93.3% good

22

Longview, WA

AQI 22 · 95.4% good

22

Elko, NV

AQI 23 · 87.1% good

23

Ellensburg, WA

AQI 23 · 87.4% good

23

Hilo, HI

AQI 21 · 97.0% good

21

Kahului-Wailuku-Lahaina, HI

AQI 21 · 99.7% good

21

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Air Quality Guides

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Understanding AQI

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Health Effects of Air Pollution

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Frequently Asked Questions

What is the air quality in the Gardnerville Ranchos, NV metro area? ▼
The Gardnerville Ranchos, NV metro area has a median Air Quality Index (AQI) of 22, rated "Good." 90.1% of monitored days (308 out of 342) had good air quality in 2024.
How many unhealthy air days does Gardnerville Ranchos, NV have? ▼
In 2024, the Gardnerville Ranchos, NV metro area recorded 0 unhealthy air days (0 Unhealthy, 0 Very Unhealthy, 0 Hazardous). The maximum AQI reached 76.
Is air quality in Gardnerville Ranchos, NV getting better or worse? ▼
Air quality in the Gardnerville Ranchos, NV metro is improving based on 5-year trends (2020-2024). Best year: 2024 with 308 good days. Worst year: 2021 with 279 good days.
What does AQI 22 mean for health? ▼
An AQI of 22 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 Gardnerville Ranchos, NV? ▼
The 90th percentile AQI for the Gardnerville Ranchos, NV metro area is 50, meaning 90% of monitored days had an AQI at or below this level. The maximum AQI recorded was 76 (Moderate).
How does Gardnerville Ranchos, NV compare to other metro areas? ▼
The Gardnerville Ranchos, NV metro has 90.1% good air days. Similar metros: Centralia, WA (93.3% good), Longview, WA (95.4% good), Elko, NV (87.1% good).

Data Sources

Primary Source: U.S. Environmental Protection Agency (EPA), Air Quality System (AQS), Annual AQI by CBSA dataset, 2020–2024. The AQS collects ambient air monitoring data from state, local, and tribal monitoring agencies across the United States.

Metrics: Air Quality Index (AQI) is calculated using EPA-standard breakpoints for six criteria pollutants: PM2.5, PM10, Ozone, NO2, CO, and SO2. Median AQI, max AQI, and 90th percentile AQI are computed from daily measurements. Good days percentage reflects days with AQI 0–50.

Coverage: 501 metro areas (Core Based Statistical Areas). Only metros with active monitoring stations are included. Unmonitored areas are not represented.

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

Source: U.S. EPA, AirNow / AQS Air Quality Index readings and pollutant concentrations · 2025