Metro area air quality · 2025

Longview, TX

Median AQI 36 (Good). 88.9% of monitored days rated Good across this metro's EPA monitoring network.

36
Median AQI
88.9%
Good-air days
0
Unhealthy days
81%
Cleaner than US metros

Aggregated from EPA Air Quality System (2025), 243 monitored days. EPA AQS →

The verdict

The Longview, TX metro runs good on the EPA scale, cleaner than most US metros, a median AQI of 36 with 88.9% of 243 monitored days in the Good band.

36
median AQI · Good
88.9%
days rated Good
81%
cleaner than US metros
115
worst single reading

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

Insights: Longview, TX metro. Aggregated EPA AQS monitors across this Core-Based Statistical Area logged a median Air Quality Index of 36 over 243 measured days in 2025, which corresponds to a Good band and a Good metro-wide health grade. The monitored-day split lands at 216 Good days (89%), 26 Moderate (11%), and 1 Unhealthy-for-Sensitive-Groups (0%). The 90th-percentile AQI finished at 51 while the highest single-day reading hit 115 (USG). Metro residents averaged roughly 26.7 clean-air days per 30-day window across the reporting year.

Across the 2020–2025 trend window, good days shifted by -141 and the median AQI moved +5 points, which classifies the multi-year trajectory as worsening. 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 Augusta-Waterville, ME (83.5% good, AQI 36); Beatrice, NE (74.0% good, AQI 36); Eureka-Arcata-Fortuna, CA (83.2% good, AQI 36).

Air Quality Summary

Median AQI

36

Good

Good Days

88.9%

216 of 243 days

Max AQI

115

USG

Health Grade

Good

90th pct: 51

AQI Day Breakdown (2025)

Distribution of 243 monitored days across EPA AQI categories.

Good

216

89%

Moderate

26

11%

USG

1

0%

Unhealthy

0

0%

Very Unhealthy

0

0%

Hazardous

0

0%

Health Impact Assessment

Good

The Longview, TX metro area's air quality is rated Good based on 88.9% 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 Longview, TX metro compare?

How Longview, TX compares

Good-day share better than US avg
Longview, TX 88.9%
Augusta-Waterville, ME 83.5%
US average 71.3%
Median AQI better than US avg
Longview, TX 36
Augusta-Waterville, ME 36
US average 41
Unhealthy days / yr better than US avg
Longview, TX 0
Augusta-Waterville, ME 0
US average 1

5-Year Air Quality Trend

Air quality is worsening in the Longview, TX metro. Best year: 2020 (357 good days).

Year Good Moderate Unhealthy Median AQI
2020 357 6 0 31
2021 336 29 0 33
2022 329 35 0 35
2023 304 59 1 35
2024 322 36 0 37
2025 216 26 0 36

Metros with Similar Air Quality

Metro areas across the US with a similar median AQI to Longview, TX.

Augusta-Waterville, ME

AQI 36 · 83.5% good

36

Beatrice, NE

AQI 36 · 74.0% good

36

Eureka-Arcata-Fortuna, CA

AQI 36 · 83.2% good

36

Iowa City, IA

AQI 36 · 71.0% good

36

Kennewick-Richland, WA

AQI 36 · 86.0% good

36

Lincoln, NE

AQI 36 · 77.7% good

36

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 Longview, TX metro area? ▼
The Longview, TX metro area has a median Air Quality Index (AQI) of 36, rated "Good." 88.9% of monitored days (216 out of 243) had good air quality in 2025.
How many unhealthy air days does Longview, TX have? ▼
In 2025, the Longview, TX metro area recorded 0 unhealthy air days (0 Unhealthy, 0 Very Unhealthy, 0 Hazardous). The maximum AQI reached 115.
Is air quality in Longview, TX getting better or worse? ▼
Air quality in the Longview, TX metro is worsening based on 5-year trends (2020-2025). Best year: 2020 with 357 good days. Worst year: 2025 with 216 good days.
What does AQI 36 mean for health? ▼
An AQI of 36 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 Longview, TX? ▼
The 90th percentile AQI for the Longview, TX metro area is 51, meaning 90% of monitored days had an AQI at or below this level. The maximum AQI recorded was 115 (USG).
How does Longview, TX compare to other metro areas? ▼
The Longview, TX metro has 88.9% good air days. Similar metros: Augusta-Waterville, ME (83.5% good), Beatrice, NE (74.0% good), Eureka-Arcata-Fortuna, CA (83.2% 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.