Median AQI
44
Good
Mississippi · County air quality · 2025
Bolivar County, Mississippi
Median AQI 44 (Good). 70.3% of monitored days rated Good, direct from EPA Air Quality System stations.
- 44
- Median AQI
- 70.3%
- Good-air days
- 0
- Unhealthy days
- 32%
- Cleaner than US counties
The verdict
According to EPA Air Quality System monitoring data, Bolivar County's air is good on balance, more polluted than the median US county, a median AQI of 44 with 70.3% of 269 monitored days in the Good band, driven mainly by PM2.5.
- 44
- median AQI · Good
- 70.3%
- days rated Good
- PM2.5
- main pollutant
- 32%
- cleaner than US counties
Not one day crossed into the Unhealthy tier; the worst single reading was AQI 88.
Data updated July 2026
- Good · 189 d · 70.3%
- Moderate · 80 d · 29.7%
How did Bolivar County's air break down in 2025?
Across 269 monitored days, 189 fell in the Good band (AQI 0–50) and 0 reached Unhealthy or worse. The worst single day peaked at AQI 88 (Moderate).
EPA AQS →Air quality data from EPA Air Quality System (2025). 269 days monitored. Median AQI: 44 (Good).
Insights: Bolivar County, Mississippi. EPA monitors recorded a median Air Quality Index of 44 across 269 measured days in 2025, earning a Good classification and a Moderate health grade. Of those days, 189 (70%) fell in the Good band (AQI 0–50), 80 (30%) registered Moderate readings, and 0 (0%) reached Unhealthy for Sensitive Groups. The 90th-percentile AQI settled at 59, while the worst single-day peak hit 88 (Moderate). Residents averaged about 21.1 clean-air days per 30-day window during the monitoring year.
The full pollutant mix ranks as PM2.5 (173 days), Ozone (96 days). Across the 2020–2025 trend window, good days shifted by -44 and the median AQI moved -2 points, placing the multi-year trajectory at improving. The worst single reading over the 2020–2025 window was AQI 88, moderate but never Unhealthy. Nearby counties show comparable readings: 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); Jackson (65.2% good, AQI 46).
Air Quality Summary
Good Days
70.3%
189 of 269 monitored days
-4.7pp vs 75% target
Max AQI Recorded
88
Moderate
Health Grade
Moderate
90th-pct AQI 59
Bolivar County, Good days share 70.3%
National avg
Share of monitored days at AQI 0-50 (Good band).
Bolivar 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 269 monitored days across EPA AQI categories.
Good
189
70%
Moderate
80
30%
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 Bolivar County.
- PM2.5 · 173 days · 64.3%
- Ozone · 96 days · 35.7%
Health Impact Assessment
Moderate
Bolivar County's air quality is rated Moderate based on 70.3% good air days. No unhealthy air days were recorded in 2025.
Air quality was acceptable on 70.3% of monitored days in 2025, with a median AQI of 44. Unusually sensitive people can check real-time conditions at AirNow.gov during high-pollution events.
The dominant pollutant is PM2.5, driving AQI on 173 of 269 monitored days.
5-Year Air Quality Trend
Air quality is improving in Bolivar County. Best year: 2024 (243 good days).
| Year | Good | Moderate | USG | Unhealthy | Median AQI | Max AQI |
|---|---|---|---|---|---|---|
| 2020 | 233 | 130 | 0 | 0 | 46 | 87 |
| 2021 | 236 | 124 | 0 | 0 | 44 | 90 |
| 2022 | 234 | 131 | 0 | 0 | 44 | 93 |
| 2023 | 162 | 198 | 4 | 0 | 52 | 126 |
| 2024 | 243 | 123 | 0 | 0 | 44 | 98 |
| 2025 | 189 | 80 | 0 | 0 | 44 | 88 |
How does Bolivar County compare?
How Bolivar County compares
Good-day share worse than US avg
Bolivar County 70.3%
DeSoto County, Mississippi 67.0%
US average 76.5%
Median AQI worse than US avg
Bolivar County 44
DeSoto County, Mississippi 44
US average 38
Unhealthy days / yr about average
Bolivar County 0
DeSoto 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 Bolivar County.
Baltimore County, Maryland
AQI 44 · 70.4% good
Baltimore (City) County, Maryland
AQI 44 · 68.7% good
Bartholomew County, Indiana
AQI 44 · 69.2% good
Berks County, Pennsylvania
AQI 44 · 65.6% good
Brewster County, Texas
AQI 44 · 69.0% good
Butte County, Idaho
AQI 44 · 87.4% good
What Bolivar 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 44 means for exposure. Health guidance
- See how Bolivar County ranks against every monitored U.S. county on Good-day share. County rankings
- Compare Bolivar County with its Mississippi neighbours before drawing a conclusion about the region. All of Mississippi
Based on 269 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 Bolivar County, Mississippi? ▼
Bolivar County has a median Air Quality Index (AQI) of 44, rated "Good." 70.3% of monitored days (189 out of 269) had good air quality in 2025.
What is the main pollutant in Bolivar County? ▼
The primary pollutant in Bolivar County is Fine Particles (PM2.5), which was the main AQI driver on 173 days (64% of monitored days). Penetrates deep into lungs and bloodstream. Linked to heart disease and premature death.
How many unhealthy air days does Bolivar County have? ▼
In 2025, Bolivar County recorded 0 unhealthy air days (0 Unhealthy, 0 Very Unhealthy, 0 Hazardous). The maximum AQI reached 88.
Is the air quality in Bolivar County getting better or worse? ▼
Air quality in Bolivar County is improving based on 5-year trends (2020-2025). Best year: 2024 with 243 good days. Worst year: 2023 with 162 good days.
What does AQI 44 mean for health? ▼
Bolivar County's median AQI of 44 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 Bolivar County compare to other counties in Mississippi? ▼
Bolivar County has 70.3% good air days. Nearby counties in Mississippi: DeSoto (67.0% good), Forrest (62.4% good), Hancock (67.8% good), Harrison (64.5% good), Hinds (43.4% good), Jackson (65.2% good).
What is the 90th percentile AQI in Bolivar County? ▼
The 90th percentile AQI for Bolivar County is 59, meaning 90% of monitored days had an AQI at or below this level. The maximum AQI recorded was 88 (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.