Median AQI
52
Moderate
Mississippi · County air quality · 2025
Hinds County, Mississippi
Median AQI 52 (Moderate). 45.8% of monitored days rated Good, direct from EPA Air Quality System stations.
- 52
- Median AQI
- 45.8%
- Good-air days
- 0
- Unhealthy days
- 5%
- Cleaner than US counties
Hinds County's 2025 annual median AQI is 52 (Moderate), with 45.8% Good days
According to the U.S. EPA Air Quality System, Hinds County, Mississippi posted a 2025 median AQI of 52 (Moderate) across 365 monitored days, with 45.8% 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
- Hinds County's 45.8% Good-day share places it cleaner than 5% of US counties in 2025.
- Closest median-AQI peer
- Allegheny County (46.0% Good, median AQI 52) is the closest nationwide median-AQI peer to Hinds County.
- 2020–2025 trend
- Hinds County's floor-qualifying Good-day share is improving from 2020 to 2025 (41.5% → 45.8%).
- Median AQI
- Median AQI: 52
The verdict
According to EPA Air Quality System monitoring data, Hinds County's air is moderate on balance, among the most polluted counties nationally, a median AQI of 52 with 45.8% of 365 monitored days in the Good band, driven mainly by PM2.5.
- 52
- median AQI · Moderate
- 45.8%
- days rated Good
- PM2.5
- main pollutant
- 5%
- cleaner than US counties
Not one day crossed into the Unhealthy tier; the worst single reading was AQI 84.
Annual release change
What changed in the 2025 EPA annual release
- Hinds County's Good-day share fell from 55.5% to 45.8% between the 2024 and 2025 EPA annual releases, a change of -9.7 percentage points.
- Hinds County's median AQI rose from 48 to 52 between the 2024 and 2025 EPA annual releases, a change of +4 points.
- Hinds County's peak single-day AQI fell from 96 to 84 between the 2024 and 2025 EPA annual releases, a change of -12 points.
Data updated August 2026
- Good · 167 d · 45.8%
- Moderate · 198 d · 54.2%
How did Hinds County's air break down in 2025?
Across 365 monitored days, 167 fell in the Good band (AQI 0–50) and 0 reached Unhealthy or worse. The worst single day peaked at AQI 84 (Moderate).
EPA AQS →Air quality data from EPA Air Quality System (2025). 365 days monitored. Median AQI: 52 (Moderate).
Insights: Hinds County, Mississippi. EPA monitors recorded a median Air Quality Index of 52 across 365 measured days in 2025, earning a Moderate classification and a Poor health grade. Of those days, 167 (46%) fell in the Good band (AQI 0–50), 198 (54%) registered Moderate readings, and 0 (0%) reached Unhealthy for Sensitive Groups. The 90th-percentile AQI settled at 63, while the worst single-day peak hit 84 (Moderate). Residents averaged about 13.7 clean-air days per 30-day window during the monitoring year.
The full pollutant mix ranks as PM2.5 (291 days), Ozone (74 days). Across the 2020–2025 trend window, the share of monitored days rated Good shifted by +4.2 points and the median AQI moved -1 points, placing the multi-year trajectory at improving. The worst single reading over the 2020–2025 window was AQI 84, moderate but never Unhealthy. Nearby counties show comparable readings: Bolivar (71.9% good, AQI 43); DeSoto (69.0% good, AQI 43); Forrest (62.3% good, AQI 45); Hancock (70.1% good, AQI 43); Harrison (69.0% good, AQI 43); Jackson (69.9% good, AQI 44).
Air Quality Summary
Good Days
45.8%
167 of 365 monitored days
-29.3pp vs 75% target
Max AQI Recorded
84
Moderate
Health Grade
Poor
90th-pct AQI 63
Hinds County, Good days share 45.8%
National avg
Share of monitored days at AQI 0-50 (Good band).
Hinds 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
167
46%
Moderate
198
54%
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 Hinds County.
- PM2.5 · 291 days · 79.7%
- Ozone · 74 days · 20.3%
Health Impact Assessment
Poor
Hinds County's air quality is rated Poor based on 45.8% good air days. No unhealthy air days were recorded in 2025.
Air quality was acceptable on 45.8% of monitored days in 2025, with a median AQI of 52. Unusually sensitive people can check real-time conditions at AirNow.gov during high-pollution events.
The dominant pollutant is PM2.5, driving AQI on 291 of 365 monitored days.
5-Year Air Quality Trend
Air quality is improving in Hinds County. Highest Good-day share: 2024 (55.5%, 203 of 366 monitored days).
| Year | Good | Moderate | USG | Unhealthy | Median AQI | Max AQI |
|---|---|---|---|---|---|---|
| 2020 | 152 | 213 | 1 | 0 | 53 | 114 |
| 2021 | 144 | 221 | 0 | 0 | 52 | 88 |
| 2022 | 168 | 195 | 2 | 0 | 52 | 105 |
| 2023 | 131 | 231 | 3 | 0 | 54 | 115 |
| 2024 | 203 | 163 | 0 | 0 | 48 | 96 |
| 2025 | 167 | 198 | 0 | 0 | 52 | 84 |
How does Hinds County compare?
How Hinds County compares
Good-day share worse than typical
Hinds County 45.8%
Allegheny County, Pennsylvania 46.0%
Typical US county 76.0%
Median AQI worse than typical
Hinds County 52
Allegheny County, Pennsylvania 52
Typical US county 39
Unhealthy days / yr better than typical
Hinds County 0
Allegheny County, Pennsylvania 0
Typical US county 1
Counties with a similar median AQI
Nationwide peers within about the same annual median AQI as Hinds County (52), not geographic neighbors.
Allegheny County, Pennsylvania
Median AQI 52 · 46.0% Good-day share
Bexar County, Texas
Median AQI 52 · 43.3% Good-day share
Bibb County, Georgia
Median AQI 52 · 42.7% Good-day share
Hidalgo County, Texas
Median AQI 52 · 44.4% Good-day share
Jefferson County, Alabama
Median AQI 52 · 43.6% Good-day share
Kent County, Michigan
Median AQI 52 · 41.9% 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).
Davidson County, North Carolina
45.8% Good-day share · median AQI 51
Santa Barbara County, California
44.9% Good-day share · median AQI 52
McLennan County, Texas
46.6% Good-day share · median AQI 51
Richmond County, Georgia
46.9% Good-day share · median AQI 52
Lucas County, Ohio
47.4% Good-day share · median AQI 52
Travis County, Texas
43.6% Good-day share · median AQI 53
Mississippi counties on the map
Geographic containment only, other monitored counties in Mississippi, independent of AQI or pollutant match.
What Hinds 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 52 means for exposure. Health guidance
- See how Hinds County ranks against every monitored U.S. county on Good-day share. County rankings
- Compare Hinds County with its Mississippi neighbours before drawing a conclusion about the region. All of Mississippi
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 Hinds County, Mississippi? ▼
Hinds County has a median Air Quality Index (AQI) of 52, rated "Moderate." 45.8% of monitored days (167 out of 365) had good air quality in 2025.
What is the main pollutant in Hinds County? ▼
The primary pollutant in Hinds County is Fine Particles (PM2.5), which was the main AQI driver on 291 days (80% of monitored days). Penetrates deep into lungs and bloodstream. Linked to heart disease and premature death.
How many unhealthy air days does Hinds County have? ▼
In 2025, Hinds County recorded 0 unhealthy air days (0 Unhealthy, 0 Very Unhealthy, 0 Hazardous). The maximum AQI reached 84.
Is the air quality in Hinds County getting better or worse? ▼
Air quality in Hinds 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: 2024 at 55.5% (203 of 366 days). Lowest qualifying Good-day share: 2023 at 35.9% (131 of 365 days).
What does AQI 52 mean for health? ▼
Hinds County's median AQI of 52 falls in the "Moderate" category. See the AQI category guide for what each range means for health.
How does Hinds County compare to other counties in Mississippi? ▼
Hinds County has 45.8% good air days. Nearby counties in Mississippi: Bolivar (71.9% good), DeSoto (69.0% good), Forrest (62.3% good), Hancock (70.1% good), Harrison (69.0% good), Jackson (69.9% good).
What is the 90th percentile AQI in Hinds County? ▼
The 90th percentile AQI for Hinds County is 63, meaning 90% of monitored days had an AQI at or below this level. The maximum AQI recorded was 84 (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 Hinds County, Mississippi · 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.