Metro area air quality · 2025

Monroe, LA

Median AQI 45 (Good). 62.2% of monitored days rated Good across this metro's EPA monitoring network.

45
Median AQI
62.2%
Good-air days
0
Unhealthy days
29%
Cleaner than US metros

Monroe, LA posted a 2025 median AQI of 45 (Good) with 62.2% Good days

According to the U.S. EPA Air Quality System, the Monroe, LA CBSA recorded a median AQI of 45 across 365 monitored days in 2025, with 62.2% rated Good and 0 unhealthy or worse. This is an annual metro comparison, not a live advisory.

Data source EPA Air Quality System (AQS)

Cleaner than US metros
The Monroe, LA CBSA's 62.2% Good-day share places it cleaner than 29% of US metros in 2025.
Closest median-AQI peer
Akron, OH (61.6% Good, median AQI 45) is the closest nationwide median-AQI peer to Monroe, LA.
2020–2025 Good-day shift
Monroe, LA's Good-day share moved -27.6 points from 2020 to 2025 (median AQI +11).
Median AQI
Median AQI: 45

Aggregated from EPA Air Quality System (2025), 365 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 45 with 62.2% of 365 monitored days in the Good band.

45
median AQI · Good
62.2%
days rated Good
29%
cleaner than US metros
80
worst single reading

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

Annual release change

What changed in the 2025 EPA annual release

2024 → 2025
  • Monroe, LA metro's Good-day share fell from 79.8% to 62.2% between the 2024 and 2025 EPA annual releases, a change of -17.6 percentage points.
  • Monroe, LA metro's peak single-day AQI fell from 97 to 80 between the 2024 and 2025 EPA annual releases, a change of -17 points.
  • Monroe, LA metro's median AQI rose from 41 to 45 between the 2024 and 2025 EPA annual releases, a change of +4 points.

Compared against 366 monitored days in 2024 and 365 in 2025. These are arithmetic differences between two stored EPA annual summaries, not a cause claim or a live advisory.

National release changes Two-year CSV

Insights: Monroe, LA metro. Aggregated EPA AQS monitors across this Core-Based Statistical Area logged a median Air Quality Index of 45 over 365 measured days in 2025, which corresponds to a Good band and a Moderate metro-wide health grade. The monitored-day split lands at 227 Good days (62%), 138 Moderate (38%), and 0 Unhealthy-for-Sensitive-Groups (0%). The 90th-percentile AQI finished at 58 while the highest single-day reading hit 80 (Moderate). Metro residents averaged roughly 18.7 clean-air days per 30-day window across the reporting year.

Across the 2020–2025 trend window, the share of monitored days rated Good shifted by -27.6 points and the median AQI moved +11 points, which classifies the multi-year trajectory as worsening. The metro recorded no Unhealthy-tier days in this annual dataset. Metros with comparable AQI profiles include Akron, OH (61.6% good, AQI 45); Ardmore, OK (67.9% good, AQI 45); Asheville, NC (69.9% good, AQI 45).

Air Quality Summary

Median AQI

45

Good

Good Days

62.2%

227 of 365 days

Max AQI

80

Moderate

Health Grade

Moderate

90th pct: 58

AQI Day Breakdown (2025)

Distribution of 365 monitored days across EPA AQI categories.

Good

227

62%

Moderate

138

38%

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 62.2% 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 62.2%
Akron, OH 61.6%
US average 70.6%
Median AQI worse than US avg
Monroe, LA 45
Akron, OH 45
US average 41
Unhealthy days / yr better than US avg
Monroe, LA 0
Akron, OH 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 227 138 0 45

Metros with a similar median AQI

CBSA peers nationwide whose annual median AQI sits near Monroe, LA (45).

Akron, OH

Median AQI 45 · 61.6% Good-day share

45

Ardmore, OK

Median AQI 45 · 67.9% Good-day share

45

Asheville, NC

Median AQI 45 · 69.9% Good-day share

45

Cheyenne, WY

Median AQI 45 · 75.1% Good-day share

45

Clinton, IA

Median AQI 45 · 59.5% Good-day share

45

Fort Dodge, IA

Median AQI 45 · 59.2% Good-day share

45

Metros with similar unhealthy-day exposure

A second relationship type: metros whose unhealthy-or-worse day count is closest to Monroe, LA's 0 (independent of median AQI).

Aberdeen, SD

0 unhealthy-or-worse days · median AQI 27

27

Aberdeen, WA

0 unhealthy-or-worse days · median AQI 22

22

Adrian, MI

0 unhealthy-or-worse days · median AQI 41

41

Albany, GA

0 unhealthy-or-worse days · median AQI 46

46

Albany, OR

0 unhealthy-or-worse days · median AQI 27

27

Albany-Schenectady-Troy, NY

0 unhealthy-or-worse days · median AQI 41

41

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 45, rated "Good." 62.2% of monitored days (227 out of 365) 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 80.
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 227 good days.
What does AQI 45 mean for health? ▼
An AQI of 45 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 80 (Moderate).
How does Monroe, LA compare to other metro areas? ▼
The Monroe, LA metro has 62.2% good air days. Similar metros: Akron, OH (61.6% good), Ardmore, OK (67.9% good), Asheville, NC (69.9% 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

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Every figure on PlainAirData 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.