Metro area air quality · 2024

Yuma, AZ

Median AQI 47 (Good). 58.1% of monitored days rated Good across this metro's EPA monitoring network.

47
Median AQI
58.1%
Good-air days
1
Unhealthy days
24%
Cleaner than US metros

Aggregated from EPA Air Quality System (2024), 365 monitored days. EPA AQS →

Insights: Yuma, AZ metro. Aggregated EPA AQS monitors across this Core-Based Statistical Area logged a median Air Quality Index of 47 over 365 measured days in 2024, which corresponds to a Good band and a Moderate metro-wide health grade. The monitored-day split lands at 212 Good days (58%), 149 Moderate (41%), and 3 Unhealthy-for-Sensitive-Groups (1%). The 90th-percentile AQI finished at 74 while the highest single-day reading hit 179 (Unhealthy). Metro residents averaged roughly 17.4 clean-air days per 30-day window across the reporting year.

Across the 2020–2024 trend window, good days shifted by +6 and the median AQI moved -2 points, which classifies the multi-year trajectory as stable. The metro recorded 1 unhealthy-or-worse days combined, on those days the EPA recommends that sensitive groups limit prolonged outdoor exertion, and many schools and athletic programs adjust outdoor activity accordingly. Metros with comparable AQI profiles include Baltimore-Columbia-Towson, MD (58.7% good, AQI 47); Bartlesville, OK (57.2% good, AQI 47); Columbia, SC (57.4% good, AQI 47).

Air Quality Summary

Median AQI

47

Good

Good Days

58.1%

212 of 365 days

Max AQI

179

Unhealthy

Health Grade

Moderate

90th pct: 74

AQI Day Breakdown (2024)

Distribution of 365 monitored days across EPA AQI categories.

Good

212

58%

Moderate

149

41%

USG

3

1%

Unhealthy

1

0%

Very Unhealthy

0

0%

Hazardous

0

0%

Health Impact Assessment

Moderate

The Yuma, AZ metro area's air quality is rated Moderate based on 58.1% good air days. There were 1 unhealthy days in 2024 when outdoor activity should be limited.

Air quality is acceptable most days, but 3 days reached "Unhealthy for Sensitive Groups" and peak AQI reached 179. Sensitive groups should monitor real-time conditions at AirNow.gov.

How does the Yuma, AZ metro compare?

How Yuma, AZ compares

Good-day share worse than US avg
Yuma, AZ 58.1%
Baltimore-Columbia-Towson, MD 58.7%
US average 70.2%
Median AQI worse than US avg
Yuma, AZ 47
Baltimore-Columbia-Towson, MD 47
US average 41
Unhealthy days / yr about average
Yuma, AZ 1
Baltimore-Columbia-Towson, MD 1
US average 1

5-Year Air Quality Trend

Air quality is stable in the Yuma, AZ metro. Best year: 2022 (228 good days).

Year Good Moderate Unhealthy Median AQI
2020 206 157 0 49
2021 186 173 1 50
2022 228 128 0 46
2023 204 150 4 48
2024 212 149 1 47

Metros with Similar Air Quality

Metro areas across the US with a similar median AQI to Yuma, AZ.

Baltimore-Columbia-Towson, MD

AQI 47 · 58.7% good

47

Bartlesville, OK

AQI 47 · 57.2% good

47

Columbia, SC

AQI 47 · 57.4% good

47

Dayton, OH

AQI 47 · 59.6% good

47

Florence, SC

AQI 47 · 61.4% good

47

Fort Wayne, IN

AQI 47 · 59.3% good

47

More Air Quality Data

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Worst Air Quality

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All Metro Areas

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Best and Worst City Air

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Air Quality Guides

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Understanding AQI

What each AQI level means and who is most at risk.

Best & Worst City Air Quality

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Health Effects of Air Pollution

How PM2.5 and ozone exposure affects respiratory and cardiovascular health.

Frequently Asked Questions

What is the air quality in the Yuma, AZ metro area? ▼
The Yuma, AZ metro area has a median Air Quality Index (AQI) of 47, rated "Good." 58.1% of monitored days (212 out of 365) had good air quality in 2024.
How many unhealthy air days does Yuma, AZ have? ▼
In 2024, the Yuma, AZ metro area recorded 1 unhealthy air days (1 Unhealthy, 0 Very Unhealthy, 0 Hazardous). The maximum AQI reached 179.
Is air quality in Yuma, AZ getting better or worse? ▼
Air quality in the Yuma, AZ metro is stable based on 5-year trends (2020-2024). Best year: 2022 with 228 good days. Worst year: 2021 with 186 good days.
What does AQI 47 mean for health? ▼
An AQI of 47 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 Yuma, AZ? ▼
The 90th percentile AQI for the Yuma, AZ metro area is 74, meaning 90% of monitored days had an AQI at or below this level. The maximum AQI recorded was 179 (Unhealthy).
How does Yuma, AZ compare to other metro areas? ▼
The Yuma, AZ metro has 58.1% good air days. Similar metros: Baltimore-Columbia-Towson, MD (58.7% good), Bartlesville, OK (57.2% good), Columbia, SC (57.4% 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 Air Quality System (AQS) Annual AQI by CBSA summary files (metro-level) · 2020–2024