Median AQI
35
Good
Mississippi · County air quality · 2025
Lauderdale County, Mississippi
Median AQI 35 (Good). 94.8% of monitored days rated Good, direct from EPA Air Quality System stations.
- 35
- Median AQI
- 94.8%
- Good-air days
- 0
- Unhealthy days
- 89%
- Cleaner than US counties
The verdict
According to EPA Air Quality System monitoring data, Lauderdale County's air is good on balance, cleaner than most US counties, a median AQI of 35 with 94.8% of 210 monitored days in the Good band, driven mainly by Ozone.
- 35
- median AQI · Good
- 94.8%
- days rated Good
- Ozone
- main pollutant
- 89%
- cleaner than US counties
Not one day crossed into the Unhealthy tier; the worst single reading was AQI 93.
Data updated July 2026
- Good · 199 d · 94.8%
- Moderate · 11 d · 5.2%
How did Lauderdale County's air break down in 2025?
Across 210 monitored days, 199 fell in the Good band (AQI 0–50) and 0 reached Unhealthy or worse. The worst single day peaked at AQI 93 (Moderate).
EPA AQS →Air quality data from EPA Air Quality System (2025). 210 days monitored. Median AQI: 35 (Good).
Insights: Lauderdale County, Mississippi. EPA monitors recorded a median Air Quality Index of 35 across 210 measured days in 2025, earning a Good classification and a Excellent health grade. Of those days, 199 (95%) fell in the Good band (AQI 0–50), 11 (5%) registered Moderate readings, and 0 (0%) reached Unhealthy for Sensitive Groups. The 90th-percentile AQI settled at 48, while the worst single-day peak hit 93 (Moderate). Residents averaged about 28.4 clean-air days per 30-day window during the monitoring year.
The full pollutant mix ranks as Ozone (210 days). Across the 2020–2025 trend window, good days shifted by -53 and the median AQI moved +4 points, placing the multi-year trajectory at worsening. The worst single reading over the 2020–2025 window was AQI 93, moderate but never Unhealthy. Nearby counties show comparable readings: Bolivar (70.3% good, AQI 44); DeSoto (67.0% good, AQI 44); Forrest (62.4% good, AQI 46); Hancock (67.8% good, AQI 44); Harrison (64.5% good, AQI 45); Hinds (43.4% good, AQI 52).
Air Quality Summary
Good Days
94.8%
199 of 210 monitored days
19.8pp vs 75% target
Max AQI Recorded
93
Moderate
Health Grade
Excellent
90th-pct AQI 48
Lauderdale County, Good days share 94.8%
National avg
Share of monitored days at AQI 0-50 (Good band).
Lauderdale 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 210 monitored days across EPA AQI categories.
Good
199
95%
Moderate
11
5%
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 Lauderdale County.
- Ozone · 210 days · 100.0%
Health Impact Assessment
Excellent
Lauderdale County's air quality is rated Excellent based on 94.8% good air days. No unhealthy air days were recorded in 2025.
Air quality was acceptable on 94.8% of monitored days in 2025, with a median AQI of 35. Unusually sensitive people can check real-time conditions at AirNow.gov during high-pollution events.
The dominant pollutant is Ozone, driving AQI on 210 of 210 monitored days.
5-Year Air Quality Trend
Air quality is worsening in Lauderdale County. Best year: 2020 (252 good days).
| Year | Good | Moderate | USG | Unhealthy | Median AQI | Max AQI |
|---|---|---|---|---|---|---|
| 2020 | 252 | 0 | 0 | 0 | 31 | 50 |
| 2021 | 244 | 1 | 0 | 0 | 31 | 54 |
| 2022 | 230 | 10 | 0 | 0 | 36 | 77 |
| 2023 | 227 | 15 | 0 | 0 | 38 | 87 |
| 2024 | 242 | 1 | 0 | 0 | 36 | 51 |
| 2025 | 199 | 11 | 0 | 0 | 35 | 93 |
How does Lauderdale County compare?
How Lauderdale County compares
Good-day share better than US avg
Lauderdale County 94.8%
Bolivar County, Mississippi 70.3%
US average 76.5%
Median AQI better than US avg
Lauderdale County 35
Bolivar County, Mississippi 44
US average 38
Unhealthy days / yr about average
Lauderdale County 0
Bolivar County, Mississippi 0
US average 0
Other Counties in Mississippi
Air quality comparison for nearby counties in Mississippi.
Counties with Similar Air Quality
Counties across the US with a similar median AQI to Lauderdale County.
Androscoggin County, Maine
AQI 35 · 85.5% good
Asotin County, Washington
AQI 35 · 73.8% good
Benton County, Washington
AQI 35 · 88.9% good
Benzie County, Michigan
AQI 35 · 91.1% good
Brooke County, West Virginia
AQI 35 · 79.3% good
Bucks County, Pennsylvania
AQI 35 · 87.5% good
What Lauderdale 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 35 means for exposure. Health guidance
- See how Lauderdale County ranks against every monitored U.S. county on Good-day share. County rankings
- Compare Lauderdale County with its Mississippi neighbours before drawing a conclusion about the region. All of Mississippi
Based on 210 EPA-monitored days in 2025; figures reflect only days the monitors reported. Source: EPA Air Quality System annual summaries.
More Air Quality Data
Air Quality Guides
Frequently Asked Questions
What is the air quality in Lauderdale County, Mississippi? ▼
Lauderdale County has a median Air Quality Index (AQI) of 35, rated "Good." 94.8% of monitored days (199 out of 210) had good air quality in 2025.
What is the main pollutant in Lauderdale County? ▼
The primary pollutant in Lauderdale County is Ozone (O3), which was the main AQI driver on 210 days (100% of monitored days). Can trigger asthma, reduce lung function, and cause chest pain.
How many unhealthy air days does Lauderdale County have? ▼
In 2025, Lauderdale County recorded 0 unhealthy air days (0 Unhealthy, 0 Very Unhealthy, 0 Hazardous). The maximum AQI reached 93.
Is the air quality in Lauderdale County getting better or worse? ▼
Air quality in Lauderdale County is worsening based on 5-year trends (2020-2025). Best year: 2020 with 252 good days. Worst year: 2025 with 199 good days.
What does AQI 35 mean for health? ▼
Lauderdale County's median AQI of 35 falls in the "Good" category. See the <a href="/guides/understanding-aqi" class="underline">AQI category guide</a> for what each range means for health.
How does Lauderdale County compare to other counties in Mississippi? ▼
Lauderdale County has 94.8% good air days. Nearby counties in Mississippi: Bolivar (70.3% good), DeSoto (67.0% good), Forrest (62.4% good), Hancock (67.8% good), Harrison (64.5% good), Hinds (43.4% good).
What is the 90th percentile AQI in Lauderdale County? ▼
The 90th percentile AQI for Lauderdale County is 48, meaning 90% of monitored days had an AQI at or below this level. The maximum AQI recorded was 93 (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.
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.