Metro area air quality · 2024

College Station-Bryan, TX

Median AQI 39 (Good). 65.7% of monitored days rated Good across this metro's EPA monitoring network.

39
Median AQI
65.7%
Good-air days
0
Unhealthy days
36%
Cleaner than US metros

Aggregated from EPA Air Quality System (2024), 353 monitored days. EPA AQS → · NOAA →

Insights: College Station-Bryan, TX metro. Aggregated EPA AQS monitors across this Core-Based Statistical Area logged a median Air Quality Index of 39 over 353 measured days in 2024, which corresponds to a Good band and a Moderate metro-wide health grade. The monitored-day split lands at 232 Good days (66%), 120 Moderate (34%), and 1 Unhealthy-for-Sensitive-Groups (0%). The 90th-percentile AQI finished at 58 while the highest single-day reading hit 102 (USG). Metro residents averaged roughly 19.7 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 -1 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 Alexandria, LA (70.3% good, AQI 39); Bend-Redmond, OR (70.5% good, AQI 39); Billings, MT (76.2% good, AQI 39).

Air Quality Summary

Median AQI

39

Good

Good Days

65.7%

232 of 353 days

Max AQI

102

USG

Health Grade

Moderate

90th pct: 58

AQI Day Breakdown (2024)

Distribution of 353 monitored days across EPA AQI categories.

Good

232

66%

Moderate

120

34%

USG

1

0%

Unhealthy

0

0%

Very Unhealthy

0

0%

Hazardous

0

0%

Health Impact Assessment

Moderate

The College Station-Bryan, TX metro area's air quality is rated Moderate based on 65.7% 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 College Station-Bryan, TX metro compare?

How College Station-Bryan, TX compares

Good-day share worse than US avg
College Station-Bryan, TX 65.7%
Alexandria, LA 70.3%
US average 70.2%
Median AQI better than US avg
College Station-Bryan, TX 39
Alexandria, LA 39
US average 41
Unhealthy days / yr better than US avg
College Station-Bryan, TX 0
Alexandria, LA 0
US average 1

5-Year Air Quality Trend

Air quality is improving in the College Station-Bryan, TX metro. Best year: 2022 (251 good days).

Year Good Moderate Unhealthy Median AQI
2020 210 93 0 40
2021 248 108 0 40
2022 251 94 0 40
2023 233 115 0 39
2024 232 120 0 39

Metros with Similar Air Quality

Metro areas across the US with a similar median AQI to College Station-Bryan, TX.

Alexandria, LA

AQI 39 · 70.3% good

39

Bend-Redmond, OR

AQI 39 · 70.5% good

39

Billings, MT

AQI 39 · 76.2% good

39

Brunswick, GA

AQI 39 · 78.1% good

39

Columbia, MO

AQI 39 · 94.2% good

39

Duluth, MN-WI

AQI 39 · 78.1% good

39

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Air Quality Guides

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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 College Station-Bryan, TX metro area? ▼
The College Station-Bryan, TX metro area has a median Air Quality Index (AQI) of 39, rated "Good." 65.7% of monitored days (232 out of 353) had good air quality in 2024.
How many unhealthy air days does College Station-Bryan, TX have? ▼
In 2024, the College Station-Bryan, TX metro area recorded 0 unhealthy air days (0 Unhealthy, 0 Very Unhealthy, 0 Hazardous). The maximum AQI reached 102.
Is air quality in College Station-Bryan, TX getting better or worse? ▼
Air quality in the College Station-Bryan, TX metro is improving based on 5-year trends (2020-2024). Best year: 2022 with 251 good days. Worst year: 2020 with 210 good days.
What does AQI 39 mean for health? ▼
An AQI of 39 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 College Station-Bryan, TX? ▼
The 90th percentile AQI for the College Station-Bryan, TX metro area is 58, meaning 90% of monitored days had an AQI at or below this level. The maximum AQI recorded was 102 (USG).
How does College Station-Bryan, TX compare to other metro areas? ▼
The College Station-Bryan, TX metro has 65.7% good air days. Similar metros: Alexandria, LA (70.3% good), Bend-Redmond, OR (70.5% good), Billings, MT (76.2% 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