Median AQI
34
Good
Alabama · County air quality · 2025
Elmore County, Alabama
Median AQI 34 (Good). 97.9% of monitored days rated Good, direct from EPA Air Quality System stations.
- 34
- Median AQI
- 97.9%
- Good-air days
- 0
- Unhealthy days
- 98%
- Cleaner than US counties
Elmore County's 2025 annual median AQI is 34 (Good), with 97.9% Good days
According to the U.S. EPA Air Quality System, Elmore County, Alabama posted a 2025 median AQI of 34 (Good) across 235 monitored days, with 97.9% 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
- Elmore County's 97.9% Good-day share places it cleaner than 98% of US counties in 2025.
- Closest median-AQI peer
- Androscoggin County (85.2% Good, median AQI 34) is the closest nationwide median-AQI peer to Elmore County.
- 2020–2025 trend
- Elmore County's floor-qualifying Good-day share is stable from 2020 to 2025 (100.0% → 97.9%).
- Median AQI
- Median AQI: 34
The verdict
According to EPA Air Quality System monitoring data, Elmore County's air is good on balance, among the cleanest 5% of US counties, a median AQI of 34 with 97.9% of 235 monitored days in the Good band, driven mainly by Ozone.
- 34
- median AQI · Good
- 97.9%
- days rated Good
- Ozone
- main pollutant
- 98%
- cleaner than US counties
Not one day crossed into the Unhealthy tier; the worst single reading was AQI 64.
Annual release change
What changed in the 2025 EPA annual release
- Elmore County's median AQI fell from 37 to 34 between the 2024 and 2025 EPA annual releases, a change of -3 points.
Data updated August 2026
- Good · 230 d · 97.9%
- Moderate · 5 d · 2.1%
How did Elmore County's air break down in 2025?
Across 235 monitored days, 230 fell in the Good band (AQI 0–50) and 0 reached Unhealthy or worse. The worst single day peaked at AQI 64 (Moderate).
EPA AQS →Air quality data from EPA Air Quality System (2025). 235 days monitored. Median AQI: 34 (Good).
Insights: Elmore County, Alabama. EPA monitors recorded a median Air Quality Index of 34 across 235 measured days in 2025, earning a Good classification and a Excellent health grade. Of those days, 230 (98%) fell in the Good band (AQI 0–50), 5 (2%) registered Moderate readings, and 0 (0%) reached Unhealthy for Sensitive Groups. The 90th-percentile AQI settled at 46, while the worst single-day peak hit 64 (Moderate). Residents averaged about 29.4 clean-air days per 30-day window during the monitoring year.
The full pollutant mix ranks as Ozone (235 days). Across the 2020–2025 trend window, the share of monitored days rated Good shifted by -2.1 points (measured against 197 monitored days in 2020 and 235 in 2025, so raw day counts are not comparable) and the median AQI moved +3 points, placing the multi-year trajectory at stable. The worst single reading over the 2020–2025 window was AQI 64, 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); Etowah (61.4% good, AQI 45); Jefferson (43.6% good, AQI 52); Lawrence (91.8% good, AQI 30).
Air Quality Summary
Good Days
97.9%
230 of 235 monitored days
22.9pp vs 75% target
Max AQI Recorded
64
Moderate
Health Grade
Excellent
90th-pct AQI 46
Elmore County, Good days share 97.9%
National avg
Share of monitored days at AQI 0-50 (Good band).
Elmore 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 235 monitored days across EPA AQI categories.
Good
230
98%
Moderate
5
2%
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 Elmore County.
- Ozone · 235 days · 100.0%
Health Impact Assessment
Excellent
Elmore County's air quality is rated Excellent based on 97.9% good air days. No unhealthy air days were recorded in 2025.
Air quality was acceptable on 97.9% of monitored days in 2025, with a median AQI of 34. Unusually sensitive people can check real-time conditions at AirNow.gov during high-pollution events.
The dominant pollutant is Ozone, driving AQI on 235 of 235 monitored days.
5-Year Air Quality Trend
Air quality is stable in Elmore County. Highest Good-day share: 2020 (100.0%, 197 of 197 monitored days).
| Year | Good | Moderate | USG | Unhealthy | Median AQI | Max AQI |
|---|---|---|---|---|---|---|
| 2020 | 197 | 0 | 0 | 0 | 31 | 47 |
| 2021 | 238 | 3 | 0 | 0 | 32 | 87 |
| 2022 | 232 | 8 | 0 | 0 | 33 | 74 |
| 2023 | 221 | 17 | 0 | 0 | 38 | 90 |
| 2024 | 231 | 3 | 0 | 0 | 37 | 58 |
| 2025 | 230 | 5 | 0 | 0 | 34 | 64 |
How does Elmore County compare?
How Elmore County compares
Good-day share better than typical
Elmore County 97.9%
Androscoggin County, Maine 85.2%
Typical US county 76.0%
Median AQI better than typical
Elmore County 34
Androscoggin County, Maine 34
Typical US county 39
Unhealthy days / yr better than typical
Elmore County 0
Androscoggin County, Maine 0
Typical US county 1
Counties with a similar median AQI
Nationwide peers within about the same annual median AQI as Elmore County (34), not geographic neighbors.
Androscoggin County, Maine
Median AQI 34 · 85.2% Good-day share
Archuleta County, Colorado
Median AQI 34 · 83.0% Good-day share
Bristol City County, Virginia
Median AQI 34 · 78.0% Good-day share
Brown County, Indiana
Median AQI 34 · 95.9% Good-day share
Clark County, Arkansas
Median AQI 34 · 96.7% Good-day share
Clay County, South Dakota
Median AQI 34 · 87.8% Good-day share
Same primary pollutant: Ozone
Ozone 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).
Prince Edward County, Virginia
97.8% Good-day share · median AQI 33
Mayagnez County, Puerto Rico
97.8% Good-day share · median AQI 9
Knox County, Maine
97.8% Good-day share · median AQI 33
Flagler County, Florida
98.1% Good-day share · median AQI 34
Fauquier County, Virginia
97.5% Good-day share · median AQI 34
Lenoir County, North Carolina
97.5% Good-day share · median AQI 35
Alabama counties on the map
Geographic containment only, other monitored counties in Alabama, independent of AQI or pollutant match.
What Elmore County's air means for you
The air here stays in the breathable range year-round, with Ozone the main thing to watch.
- Sensitive groups (asthma, heart conditions, children, older adults) should check the AQI on high-Ozone days, the guide explains what a median of 34 means for exposure. Health guidance
- See how Elmore County ranks against every monitored U.S. county on Good-day share. County rankings
- Compare Elmore County with its Alabama neighbours before drawing a conclusion about the region. All of Alabama
Based on 235 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 Elmore County, Alabama? ▼
Elmore County has a median Air Quality Index (AQI) of 34, rated "Good." 97.9% of monitored days (230 out of 235) had good air quality in 2025.
What is the main pollutant in Elmore County? ▼
The primary pollutant in Elmore County is Ozone (O3), which was the main AQI driver on 235 days (100% of monitored days). Can trigger asthma, reduce lung function, and cause chest pain.
How many unhealthy air days does Elmore County have? ▼
In 2025, Elmore County recorded 0 unhealthy air days (0 Unhealthy, 0 Very Unhealthy, 0 Hazardous). The maximum AQI reached 64.
Is the air quality in Elmore County getting better or worse? ▼
Air quality in Elmore County is stable across floor-qualifying years (2020-2025); years with fewer than 100 monitored days are excluded from that direction. Highest qualifying Good-day share: 2020 at 100.0% (197 of 197 days). Lowest qualifying Good-day share: 2023 at 92.9% (221 of 238 days).
What does AQI 34 mean for health? ▼
Elmore County's median AQI of 34 falls in the "Good" category. See the AQI category guide for what each range means for health.
How does Elmore County compare to other counties in Alabama? ▼
Elmore County has 97.9% good air days. Nearby counties in Alabama: Baldwin (75.5% good), Clay (81.1% good), DeKalb (77.3% good), Etowah (61.4% good), Jefferson (43.6% good), Lawrence (91.8% good).
What is the 90th percentile AQI in Elmore County? ▼
The 90th percentile AQI for Elmore County is 46, meaning 90% of monitored days had an AQI at or below this level. The maximum AQI recorded was 64 (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 Elmore County, Alabama · 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.