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
Monroe, LA lands in the lower Good-day tercile (62.2% Good), a thinner clean-air share than most CBSA peers here. On the EPA scale the metro runs good, more polluted than the median US metro, with a median AQI of 45 and 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
- 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.
Monroe, LA lands in the lower Good-day tercile (62.2% Good), a thinner clean-air share than most CBSA peers here. Signature read: 62.2% Good-day share (low tercile vs CBSA corpus). Aggregated EPA AQS monitors across this Core-Based Statistical Area logged a median Air Quality Index of 45 over 365 measured days in 2025 (Good / Moderate). The monitored-day split lands at 227 Good (62%), 138 Moderate (38%), and 0 Unhealthy-for-Sensitive-Groups (0%). The 90th-percentile AQI finished at 58; the highest single-day reading hit 80 (Moderate).
Across 2020–2025, Good-day share shifted -27.6 points and median AQI moved +11 (worsening). No Unhealthy-tier days appear 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
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
5-Year Air Quality Trend
Air quality is worsening in the Monroe, LA metro. Highest Good-day share: 2021 (91.1%, 318 of 349 monitored days).
| Year | Good | Moderate | Unhealthy | Median AQI | Max AQI |
|---|---|---|---|---|---|
| 2020 | 324 | 37 | 0 | 34 | 111 |
| 2021 | 318 | 31 | 0 | 35 | 87 |
| 2022 | 309 | 49 | 0 | 38 | 105 |
| 2023 | 283 | 75 | 0 | 38 | 100 |
| 2024 | 292 | 74 | 0 | 41 | 97 |
| 2025 | 227 | 138 | 0 | 45 | 80 |
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
Ardmore, OK
Median AQI 45 · 67.9% Good-day share
Asheville, NC
Median AQI 45 · 69.9% Good-day share
Cheyenne, WY
Median AQI 45 · 75.1% Good-day share
Clinton, IA
Median AQI 45 · 59.5% Good-day share
Fort Dodge, IA
Median AQI 45 · 59.2% Good-day share
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
Aberdeen, WA
0 unhealthy-or-worse days · median AQI 22
Adrian, MI
0 unhealthy-or-worse days · median AQI 41
Albany, GA
0 unhealthy-or-worse days · median AQI 46
Albany, OR
0 unhealthy-or-worse days · median AQI 27
Albany-Schenectady-Troy, NY
0 unhealthy-or-worse days · median AQI 41
Frequently Asked Questions
How many unhealthy air days does Monroe, LA have? ▼
What is the air quality in the Monroe, LA metro area? ▼
Is air quality in Monroe, LA getting better or worse? ▼
What does AQI 45 mean for health? ▼
How does Monroe, LA compare to other metro areas? ▼
What is the 90th percentile AQI for Monroe, LA? ▼
Data Sources
Primary Source: U.S. Environmental Protection Agency (EPA), Air Quality System (AQS), Annual AQI by CBSA dataset for Monroe, LA, 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, Monroe, LA · 2020–2025