Metro area air quality · 2025

Monroe, LA

Median AQI 46 (Good). 61.0% of monitored days rated Good across this metro's EPA monitoring network.

46
Median AQI
61.0%
Good-air days
0
Unhealthy days
25%
Cleaner than US metros

Aggregated from EPA Air Quality System (2025), 272 monitored days. EPA AQS →

The verdict

The Monroe, LA metro runs good on the EPA scale, more polluted than the median US metro, a median AQI of 46 with 61.0% of 272 monitored days in the Good band.

46
median AQI · Good
61.0%
days rated Good
25%
cleaner than US metros
71
worst single reading

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

Insights: Monroe, LA metro. Aggregated EPA AQS monitors across this Core-Based Statistical Area logged a median Air Quality Index of 46 over 272 measured days in 2025, which corresponds to a Good band and a Moderate metro-wide health grade. The monitored-day split lands at 166 Good days (61%), 106 Moderate (39%), and 0 Unhealthy-for-Sensitive-Groups (0%). The 90th-percentile AQI finished at 58 while the highest single-day reading hit 71 (Moderate). Metro residents averaged roughly 18.3 clean-air days per 30-day window across the reporting year.

Across the 2020–2025 trend window, good days shifted by -158 and the median AQI moved +12 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 Albany, GA (55.6% good, AQI 46); Asheville, NC (68.1% good, AQI 46); Cedar City, UT (70.0% good, AQI 46).

Air Quality Summary

Median AQI

46

Good

Good Days

61.0%

166 of 272 days

Max AQI

71

Moderate

Health Grade

Moderate

90th pct: 58

AQI Day Breakdown (2025)

Distribution of 272 monitored days across EPA AQI categories.

Good

166

61%

Moderate

106

39%

USG

0

0%

Unhealthy

0

0%

Very Unhealthy

0

0%

Hazardous

0

0%

Health Impact Assessment

Moderate

The Monroe, LA metro area's air quality is rated Moderate based on 61.0% 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 Monroe, LA metro compare?

How Monroe, LA compares

Good-day share worse than US avg
Monroe, LA 61.0%
Albany, GA 55.6%
US average 71.3%
Median AQI worse than US avg
Monroe, LA 46
Albany, GA 46
US average 41
Unhealthy days / yr better than US avg
Monroe, LA 0
Albany, GA 0
US average 1

5-Year Air Quality Trend

Air quality is worsening in the Monroe, LA metro. Best year: 2020 (324 good days).

Year Good Moderate Unhealthy Median AQI
2020 324 37 0 34
2021 318 31 0 35
2022 309 49 0 38
2023 283 75 0 38
2024 292 74 0 41
2025 166 106 0 46

Metros with Similar Air Quality

Metro areas across the US with a similar median AQI to Monroe, LA.

Albany, GA

AQI 46 · 55.6% good

46

Asheville, NC

AQI 46 · 68.1% good

46

Cedar City, UT

AQI 46 · 70.0% good

46

Des Moines-West Des Moines, IA

AQI 46 · 58.5% good

46

Evansville, IN-KY

AQI 46 · 61.6% good

46

Gainesville, GA

AQI 46 · 55.0% good

46

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 Monroe, LA metro area? ▼
The Monroe, LA metro area has a median Air Quality Index (AQI) of 46, rated "Good." 61.0% of monitored days (166 out of 272) had good air quality in 2025.
How many unhealthy air days does Monroe, LA have? ▼
In 2025, the Monroe, LA metro area recorded 0 unhealthy air days (0 Unhealthy, 0 Very Unhealthy, 0 Hazardous). The maximum AQI reached 71.
Is air quality in Monroe, LA getting better or worse? ▼
Air quality in the Monroe, LA metro is worsening based on 5-year trends (2020-2025). Best year: 2020 with 324 good days. Worst year: 2025 with 166 good days.
What does AQI 46 mean for health? ▼
An AQI of 46 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 Monroe, LA? ▼
The 90th percentile AQI for the Monroe, LA metro area is 58, meaning 90% of monitored days had an AQI at or below this level. The maximum AQI recorded was 71 (Moderate).
How does Monroe, LA compare to other metro areas? ▼
The Monroe, LA metro has 61.0% good air days. Similar metros: Albany, GA (55.6% good), Asheville, NC (68.1% good), Cedar City, UT (70.0% 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.