Median AQI
29
Good
Wisconsin · County air quality · 2025
Jackson County, Wisconsin
Median AQI 29 (Good). 76.0% of monitored days rated Good, direct from EPA Air Quality System stations.
- 29
- Median AQI
- 76.0%
- Good-air days
- 0
- Unhealthy days
- 42%
- Cleaner than US counties
The verdict
According to EPA Air Quality System monitoring data, Jackson County's air is good on balance, more polluted than the median US county, a median AQI of 29 with 76.0% of 150 monitored days in the Good band, driven mainly by PM2.5.
- 29
- median AQI · Good
- 76.0%
- days rated Good
- PM2.5
- main pollutant
- 42%
- cleaner than US counties
Not one day crossed into the Unhealthy tier; the worst single reading was AQI 110.
Data updated July 2026
- Good · 114 d · 76.0%
- Moderate · 34 d · 22.7%
- USG · 2 d · 1.3%
How did Jackson County's air break down in 2025?
Across 150 monitored days, 114 fell in the Good band (AQI 0–50) and 0 reached Unhealthy or worse. The worst single day peaked at AQI 110 (USG).
EPA AQS →Air quality data from EPA Air Quality System (2025). 150 days monitored. Median AQI: 29 (Good).
Insights: Jackson County, Wisconsin. EPA monitors recorded a median Air Quality Index of 29 across 150 measured days in 2025, earning a Good classification and a Good health grade. Of those days, 114 (76%) fell in the Good band (AQI 0–50), 34 (23%) registered Moderate readings, and 2 (1%) reached Unhealthy for Sensitive Groups. The 90th-percentile AQI settled at 62, while the worst single-day peak hit 110 (USG). Residents averaged about 22.8 clean-air days per 30-day window during the monitoring year.
The full pollutant mix ranks as PM2.5 (150 days). Across the 2021–2025 trend window, good days shifted by -73 and the median AQI moved -2 points, placing the multi-year trajectory at stable. The worst single reading over the 2021–2025 window was AQI 110, usg but never Unhealthy. Nearby counties show comparable readings: Ashland (85.6% good, AQI 39); Brown (79.0% good, AQI 37); Columbia (84.6% good, AQI 42); Dane (71.8% good, AQI 40); Dodge (76.4% good, AQI 39); Door (85.7% good, AQI 40).
Air Quality Summary
Good Days
76.0%
114 of 150 monitored days
1.0pp vs 75% target
Max AQI Recorded
110
USG
Health Grade
Good
90th-pct AQI 62
Jackson County, Good days share 76.0%
National avg
Share of monitored days at AQI 0-50 (Good band).
Jackson 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 150 monitored days across EPA AQI categories.
Good
114
76%
Moderate
34
23%
USG
2
1%
Unhealthy
0
0%
Very Unhealthy
0
0%
Hazardous
0
0%
Pollutant Breakdown
Days where each pollutant was the primary driver of AQI readings in Jackson County.
- PM2.5 · 150 days · 100.0%
Health Impact Assessment
Good
Jackson County's air quality is rated Good based on 76.0% good air days. No unhealthy air days were recorded in 2025.
Air quality was acceptable on 76.0% of monitored days in 2025, with a median AQI of 29. Unusually sensitive people can check real-time conditions at AirNow.gov during high-pollution events.
The dominant pollutant is PM2.5, driving AQI on 150 of 150 monitored days.
5-Year Air Quality Trend
Air quality is stable in Jackson County. Best year: 2022 (298 good days).
| Year | Good | Moderate | USG | Unhealthy | Median AQI | Max AQI |
|---|---|---|---|---|---|---|
| 2021 | 187 | 50 | 0 | 0 | 31 | 97 |
| 2022 | 298 | 60 | 1 | 0 | 30 | 118 |
| 2023 | 253 | 103 | 4 | 2 | 33 | 157 |
| 2024 | 238 | 39 | 0 | 0 | 27 | 95 |
| 2025 | 114 | 34 | 2 | 0 | 29 | 110 |
How does Jackson County compare?
How Jackson County compares
Good-day share worse than US avg
Jackson County 76.0%
Ashland County, Wisconsin 85.6%
US average 76.5%
Median AQI better than US avg
Jackson County 29
Ashland County, Wisconsin 39
US average 38
Unhealthy days / yr about average
Jackson County 0
Ashland County, Wisconsin 1
US average 0
Other Counties in Wisconsin
Air quality comparison for nearby counties in Wisconsin.
Counties with Similar Air Quality
Counties across the US with a similar median AQI to Jackson County.
Bayamon County, Puerto Rico
AQI 29 · 88.5% good
Fajardo County, Puerto Rico
AQI 29 · 85.7% good
Grant County, Oklahoma
AQI 29 · 90.0% good
Nez Perce County, Idaho
AQI 29 · 84.0% good
Roane County, Tennessee
AQI 29 · 84.1% good
Washington County, Nebraska
AQI 29 · 84.3% good
What Jackson 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 29 means for exposure. Health guidance
- See how Jackson County ranks against every monitored U.S. county on Good-day share. County rankings
- Compare Jackson County with its Wisconsin neighbours before drawing a conclusion about the region. All of Wisconsin
Based on 150 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 Jackson County, Wisconsin? ▼
Jackson County has a median Air Quality Index (AQI) of 29, rated "Good." 76.0% of monitored days (114 out of 150) had good air quality in 2025.
What is the main pollutant in Jackson County? ▼
The primary pollutant in Jackson County is Fine Particles (PM2.5), which was the main AQI driver on 150 days (100% of monitored days). Penetrates deep into lungs and bloodstream. Linked to heart disease and premature death.
How many unhealthy air days does Jackson County have? ▼
In 2025, Jackson County recorded 0 unhealthy air days (0 Unhealthy, 0 Very Unhealthy, 0 Hazardous). The maximum AQI reached 110.
Is the air quality in Jackson County getting better or worse? ▼
Air quality in Jackson County is stable based on 5-year trends (2021-2025). Best year: 2022 with 298 good days. Worst year: 2025 with 114 good days.
What does AQI 29 mean for health? ▼
Jackson County's median AQI of 29 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 Jackson County compare to other counties in Wisconsin? ▼
Jackson County has 76.0% good air days. Nearby counties in Wisconsin: Ashland (85.6% good), Brown (79.0% good), Columbia (84.6% good), Dane (71.8% good), Dodge (76.4% good), Door (85.7% good).
What is the 90th percentile AQI in Jackson County? ▼
The 90th percentile AQI for Jackson County is 62, meaning 90% of monitored days had an AQI at or below this level. The maximum AQI recorded was 110 (USG).
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.