Metro area air quality · 2024
Marshall, TX
Median AQI 44 (Good). 63.8% of monitored days rated Good across this metro's EPA monitoring network.
- 44
- Median AQI
- 63.8%
- Good-air days
- 3
- Unhealthy days
- 33%
- Cleaner than US metros
Aggregated from EPA Air Quality System (2024), 365 monitored days. EPA AQS →
The verdict
The Marshall, TX metro runs good on the EPA scale — a median AQI of 44 with 63.8% of 365 monitored days in the Good band.
- 44
- median AQI · Good
- 63.8%
- days rated Good
- 33%
- cleaner than US metros
- 263
- worst single reading
3 days reached Unhealthy or worse across the metro's monitors in 2024.
Insights: Marshall, TX metro. Aggregated EPA AQS monitors across this Core-Based Statistical Area logged a median Air Quality Index of 44 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 233 Good days (64%), 129 Moderate (35%), and 0 Unhealthy-for-Sensitive-Groups (0%). The 90th-percentile AQI finished at 61 while the highest single-day reading hit 263 (Very Unhealthy). Metro residents averaged roughly 19.2 clean-air days per 30-day window across the reporting year.
Across the 2020–2024 trend window, good days shifted by -31 and the median AQI moved +4 points, which classifies the multi-year trajectory as worsening. The metro recorded 3 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 Amarillo, TX (72.8% good, AQI 44); Berlin, NH-VT (81.1% good, AQI 44); Bloomington, IL (69.4% good, AQI 44).
Air Quality Summary
Median AQI
44
Good
Good Days
63.8%
233 of 365 days
Max AQI
263
Very Unhealthy
Health Grade
Moderate
90th pct: 61
AQI Day Breakdown (2024)
Distribution of 365 monitored days across EPA AQI categories.
Good
233
64%
Moderate
129
35%
USG
0
0%
Unhealthy
1
0%
Very Unhealthy
2
1%
Hazardous
0
0%
Health Impact Assessment
The Marshall, TX metro area's air quality is rated Moderate based on 63.8% good air days. There were 3 unhealthy days in 2024 when outdoor activity should be limited.
Air quality reached unhealthy levels on 3 days in 2024 (1 Unhealthy, 2 Very Unhealthy). Sensitive groups, including people with asthma, COPD, cardiovascular conditions, children, and adults over 65, should review the daily breakdown and follow local advisories.
Sensitive group advisory
People with asthma, COPD, heart disease, children, pregnant women, and adults 65+ should follow EPA AQI alerts daily and limit outdoor exertion when AQI exceeds 100. Real-time conditions: airnow.gov.
How does the Marshall, TX metro compare?
How Marshall, TX compares
5-Year Air Quality Trend
Air quality is worsening in the Marshall, TX metro. Best year: 2020 (264 good days).
| Year | Good | Moderate | Unhealthy | Median AQI | Max AQI |
|---|---|---|---|---|---|
| 2020 | 264 | 99 | 0 | 40 | 100 |
| 2021 | 205 | 153 | 1 | 47 | 161 |
| 2022 | 164 | 159 | 1 | 51 | 181 |
| 2023 | 207 | 151 | 0 | 47 | 111 |
| 2024 | 233 | 129 | 1 | 44 | 263 |
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Frequently Asked Questions
What is the air quality in the Marshall, TX metro area? ▼
How many unhealthy air days does Marshall, TX have? ▼
Is air quality in Marshall, TX getting better or worse? ▼
What does AQI 44 mean for health? ▼
What is the 90th percentile AQI for Marshall, TX? ▼
How does Marshall, TX compare to other metro areas? ▼
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