Median AQI
41
Good
Alabama · County air quality · 2025
Morgan County, Alabama
Median AQI 41 (Good). 78.9% of monitored days rated Good, direct from EPA Air Quality System stations.
- 41
- Median AQI
- 78.9%
- Good-air days
- 0
- Unhealthy days
- 53%
- Cleaner than US counties
Morgan County's 2025 annual median AQI is 41 (Good), with 78.9% Good days
According to the U.S. EPA Air Quality System, Morgan County, Alabama posted a 2025 median AQI of 41 (Good) across 365 monitored days, with 78.9% rated Good and 0 unhealthy or worse. This is an annual comparison, not today's advisory.
Data source EPA Air Quality System (AQS)
- Cleaner than US
- Morgan County's 78.9% Good-day share places it cleaner than 53% of US counties in 2025.
- Closest median-AQI peer
- Armstrong County (70.5% Good, median AQI 41) is the closest nationwide median-AQI peer to Morgan County.
- 2020–2025 trend
- Morgan County's floor-qualifying Good-day share is improving from 2020 to 2025 (70.7% → 78.9%).
- Median AQI
- Median AQI: 41
The verdict
According to EPA Air Quality System monitoring data, Morgan County's air is good on balance, cleaner than the median US county, a median AQI of 41 with 78.9% of 365 monitored days in the Good band, driven mainly by PM2.5.
- 41
- median AQI · Good
- 78.9%
- days rated Good
- PM2.5
- main pollutant
- 53%
- cleaner than US counties
Not one day crossed into the Unhealthy tier; the worst single reading was AQI 71.
Annual release change
What changed in the 2025 EPA annual release
- Morgan County's Good-day share rose from 72.1% to 78.9% between the 2024 and 2025 EPA annual releases, a change of +6.8 percentage points.
- Morgan County's median AQI fell from 44 to 41 between the 2024 and 2025 EPA annual releases, a change of -3 points.
- Morgan County's peak single-day AQI fell from 81 to 71 between the 2024 and 2025 EPA annual releases, a change of -10 points.
Data updated August 2026
- Good · 288 d · 78.9%
- Moderate · 77 d · 21.1%
How did Morgan County's air break down in 2025?
Across 365 monitored days, 288 fell in the Good band (AQI 0–50) and 0 reached Unhealthy or worse. The worst single day peaked at AQI 71 (Moderate).
EPA AQS →Air quality data from EPA Air Quality System (2025). 365 days monitored. Median AQI: 41 (Good).
Insights: Morgan County, Alabama. EPA monitors recorded a median Air Quality Index of 41 across 365 measured days in 2025, earning a Good classification and a Good health grade. Of those days, 288 (79%) fell in the Good band (AQI 0–50), 77 (21%) registered Moderate readings, and 0 (0%) reached Unhealthy for Sensitive Groups. The 90th-percentile AQI settled at 55, while the worst single-day peak hit 71 (Moderate). Residents averaged about 23.7 clean-air days per 30-day window during the monitoring year.
The full pollutant mix ranks as PM2.5 (230 days), Ozone (135 days). Across the 2020–2025 trend window, the share of monitored days rated Good shifted by +8.2 points and the median AQI moved +0 points, placing the multi-year trajectory at improving. The worst single reading over the 2020–2025 window was AQI 71, moderate but never Unhealthy. Nearby counties show comparable readings: Baldwin (75.5% good, AQI 42); Clay (81.1% good, AQI 33); DeKalb (77.3% good, AQI 41); Elmore (97.9% good, AQI 34); Etowah (61.4% good, AQI 45); Jefferson (43.6% good, AQI 52).
Air Quality Summary
Good Days
78.9%
288 of 365 monitored days
3.9pp vs 75% target
Max AQI Recorded
71
Moderate
Health Grade
Good
90th-pct AQI 55
Morgan County, Good days share 78.9%
National avg
Share of monitored days at AQI 0-50 (Good band).
Morgan County, Unhealthy-or-worse share 0.0%
National avg
Share of monitored days above AQI 150 (Unhealthy or worse). Bar maxes at 10% (worst-county ceiling).
AQI Day Breakdown (2025)
Distribution of 365 monitored days across EPA AQI categories.
Good
288
79%
Moderate
77
21%
USG
0
0%
Unhealthy
0
0%
Very Unhealthy
0
0%
Hazardous
0
0%
Pollutant Breakdown
Days where each pollutant was the primary driver of AQI readings in Morgan County.
- PM2.5 · 230 days · 63.0%
- Ozone · 135 days · 37.0%
Health Impact Assessment
Good
Morgan County's air quality is rated Good based on 78.9% good air days. No unhealthy air days were recorded in 2025.
Air quality was acceptable on 78.9% of monitored days in 2025, with a median AQI of 41. Unusually sensitive people can check real-time conditions at AirNow.gov during high-pollution events.
The dominant pollutant is PM2.5, driving AQI on 230 of 365 monitored days.
5-Year Air Quality Trend
Air quality is improving in Morgan County. Highest Good-day share: 2025 (78.9%, 288 of 365 monitored days).
| Year | Good | Moderate | USG | Unhealthy | Median AQI | Max AQI |
|---|---|---|---|---|---|---|
| 2020 | 251 | 104 | 0 | 0 | 41 | 75 |
| 2021 | 209 | 156 | 0 | 0 | 47 | 97 |
| 2022 | 208 | 156 | 1 | 0 | 47 | 111 |
| 2023 | 259 | 103 | 2 | 0 | 43 | 140 |
| 2024 | 264 | 102 | 0 | 0 | 44 | 81 |
| 2025 | 288 | 77 | 0 | 0 | 41 | 71 |
How does Morgan County compare?
How Morgan County compares
Good-day share better than US avg
Morgan County 78.9%
Armstrong County, Pennsylvania 70.5%
US average 76.0%
Median AQI worse than US avg
Morgan County 41
Armstrong County, Pennsylvania 41
US average 39
Unhealthy days / yr better than US avg
Morgan County 0
Armstrong County, Pennsylvania 0
US average 1
Counties with a similar median AQI
Nationwide peers within about the same annual median AQI as Morgan County (41), not geographic neighbors.
Armstrong County, Pennsylvania
Median AQI 41 · 70.5% Good-day share
Benewah County, Idaho
Median AQI 41 · 63.4% Good-day share
Berrien County, Michigan
Median AQI 41 · 80.9% Good-day share
Callaway County, Missouri
Median AQI 41 · 89.6% Good-day share
Cambria County, Pennsylvania
Median AQI 41 · 74.5% Good-day share
Cass County, Missouri
Median AQI 41 · 77.6% Good-day share
Same primary pollutant: PM2.5
PM2.5 led the AQI on the most monitored days here. These peers share that driver and the closest Good-day share (a second relationship type beyond median-AQI neighbors).
Richmond City County, Virginia
78.9% Good-day share · median AQI 36
Nassau County, New York
78.8% Good-day share · median AQI 29
Sarpy County, Nebraska
78.8% Good-day share · median AQI 32
Beltrami County, Minnesota
79.1% Good-day share · median AQI 36
Jackson County, South Dakota
78.6% Good-day share · median AQI 43
Anchorage County, Alaska
79.2% Good-day share · median AQI 26
Alabama counties on the map
Geographic containment only, other monitored counties in Alabama, independent of AQI or pollutant match.
What Morgan County's air means for you
The air here stays in the breathable range year-round, with PM2.5 the main thing to watch.
- Sensitive groups (asthma, heart conditions, children, older adults) should check the AQI on high-PM2.5 days, the guide explains what a median of 41 means for exposure. Health guidance
- See how Morgan County ranks against every monitored U.S. county on Good-day share. County rankings
- Compare Morgan County with its Alabama neighbours before drawing a conclusion about the region. All of Alabama
Based on 365 EPA-monitored days in 2025; figures reflect only days the monitors reported. Source: EPA Air Quality System annual summaries.
Keep exploring the annual AQI record
Air-quality reading list
Frequently Asked Questions
What is the air quality in Morgan County, Alabama? ▼
Morgan County has a median Air Quality Index (AQI) of 41, rated "Good." 78.9% of monitored days (288 out of 365) had good air quality in 2025.
What is the main pollutant in Morgan County? ▼
The primary pollutant in Morgan County is Fine Particles (PM2.5), which was the main AQI driver on 230 days (63% of monitored days). Penetrates deep into lungs and bloodstream. Linked to heart disease and premature death.
How many unhealthy air days does Morgan County have? ▼
In 2025, Morgan County recorded 0 unhealthy air days (0 Unhealthy, 0 Very Unhealthy, 0 Hazardous). The maximum AQI reached 71.
Is the air quality in Morgan County getting better or worse? ▼
Air quality in Morgan County is improving across floor-qualifying years (2020-2025); years with fewer than 100 monitored days are excluded from that direction. Highest qualifying Good-day share: 2025 at 78.9% (288 of 365 days). Lowest qualifying Good-day share: 2022 at 57.0% (208 of 365 days).
What does AQI 41 mean for health? ▼
Morgan County's median AQI of 41 falls in the "Good" category. See the AQI category guide for what each range means for health.
How does Morgan County compare to other counties in Alabama? ▼
Morgan County has 78.9% good air days. Nearby counties in Alabama: Baldwin (75.5% good), Clay (81.1% good), DeKalb (77.3% good), Elmore (97.9% good), Etowah (61.4% good), Jefferson (43.6% good).
What is the 90th percentile AQI in Morgan County? ▼
The 90th percentile AQI for Morgan County is 55, meaning 90% of monitored days had an AQI at or below this level. The maximum AQI recorded was 71 (Moderate).
Data Sources
Primary Source: U.S. Environmental Protection Agency (EPA), Air Quality System (AQS), Annual AQI by County dataset, 2020–2025 (aqs.epa.gov). For current conditions (not shown here — this page is historical annual data), see EPA AirNow (airnow.gov). See our methodology for how AQI, median, and coverage figures are computed.
Informational only, not professional advice. Data from EPA AQS. See our disclaimer. Spotted a figure that looks wrong? Report a correction.
Source: U.S. EPA Air Quality System (AQS) Annual AQI by county summary files for Morgan County, Alabama · 2020–2025
Share this annual record
Send the source-year summary or download its ready-to-use data card.
Download this county's annual AQI row as CSV , with the same EPA fields and denominator shown on this page.
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.