Median AQI
36
Good
Michigan · County air quality · 2025
Missaukee County, Michigan
Median AQI 36 (Good). 90.8% of monitored days rated Good, direct from EPA Air Quality System stations.
- 36
- Median AQI
- 90.8%
- Good-air days
- 0
- Unhealthy days
- 77%
- Cleaner than US counties
The verdict
According to EPA Air Quality System monitoring data, Missaukee County's air is good on balance, cleaner than most US counties, a median AQI of 36 with 90.8% of 293 monitored days in the Good band, driven mainly by Ozone.
- 36
- median AQI · Good
- 90.8%
- days rated Good
- Ozone
- main pollutant
- 77%
- cleaner than US counties
Not one day crossed into the Unhealthy tier; the worst single reading was AQI 92.
Data updated July 2026
- Good · 266 d · 90.8%
- Moderate · 27 d · 9.2%
How did Missaukee County's air break down in 2025?
Across 293 monitored days, 266 fell in the Good band (AQI 0–50) and 0 reached Unhealthy or worse. The worst single day peaked at AQI 92 (Moderate).
EPA AQS →Air quality data from EPA Air Quality System (2025). 293 days monitored. Median AQI: 36 (Good).
Insights: Missaukee County, Michigan. EPA monitors recorded a median Air Quality Index of 36 across 293 measured days in 2025, earning a Good classification and a Excellent health grade. Of those days, 266 (91%) fell in the Good band (AQI 0–50), 27 (9%) registered Moderate readings, and 0 (0%) reached Unhealthy for Sensitive Groups. The 90th-percentile AQI settled at 49, while the worst single-day peak hit 92 (Moderate). Residents averaged about 27.2 clean-air days per 30-day window during the monitoring year.
The full pollutant mix ranks as Ozone (247 days), PM2.5 (45 days), NO2 (1 days). Across the 2020–2025 trend window, good days shifted by +18 and the median AQI moved -5 points, placing the multi-year trajectory at improving. The worst single reading over the 2020–2025 window was AQI 92, moderate but never Unhealthy. Nearby counties show comparable readings: Allegan (71.2% good, AQI 43); Bay (71.8% good, AQI 38); Benzie (91.1% good, AQI 35); Berrien (80.9% good, AQI 41); Cass (85.3% good, AQI 40); Clinton (90.2% good, AQI 39).
Air Quality Summary
Good Days
90.8%
266 of 293 monitored days
15.8pp vs 75% target
Max AQI Recorded
92
Moderate
Health Grade
Excellent
90th-pct AQI 49
Missaukee County, Good days share 90.8%
National avg
Share of monitored days at AQI 0-50 (Good band).
Missaukee 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 293 monitored days across EPA AQI categories.
Good
266
91%
Moderate
27
9%
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 Missaukee County.
- Ozone · 247 days · 84.3%
- PM2.5 · 45 days · 15.4%
- NO₂ · 1 days · 0.3%
Health Impact Assessment
Excellent
Missaukee County's air quality is rated Excellent based on 90.8% good air days. No unhealthy air days were recorded in 2025.
Air quality was acceptable on 90.8% of monitored days in 2025, with a median AQI of 36. Unusually sensitive people can check real-time conditions at AirNow.gov during high-pollution events.
The dominant pollutant is Ozone, driving AQI on 247 of 293 monitored days.
5-Year Air Quality Trend
Air quality is improving in Missaukee County. Best year: 2024 (337 good days).
| Year | Good | Moderate | USG | Unhealthy | Median AQI | Max AQI |
|---|---|---|---|---|---|---|
| 2020 | 248 | 116 | 1 | 0 | 41 | 105 |
| 2021 | 216 | 139 | 0 | 0 | 45 | 90 |
| 2022 | 228 | 134 | 1 | 0 | 46 | 108 |
| 2023 | 203 | 153 | 4 | 1 | 48 | 201 |
| 2024 | 337 | 28 | 0 | 0 | 35 | 84 |
| 2025 | 266 | 27 | 0 | 0 | 36 | 92 |
How does Missaukee County compare?
How Missaukee County compares
Good-day share better than US avg
Missaukee County 90.8%
Allegan County, Michigan 71.2%
US average 76.5%
Median AQI better than US avg
Missaukee County 36
Allegan County, Michigan 43
US average 38
Unhealthy days / yr about average
Missaukee County 0
Allegan County, Michigan 1
US average 0
Other Counties in Michigan
Air quality comparison for nearby counties in Michigan.
Counties with Similar Air Quality
Counties across the US with a similar median AQI to Missaukee County.
Aroostook County, Maine
AQI 36 · 84.1% good
Berkeley County, South Carolina
AQI 36 · 92.2% good
Carter County, Kentucky
AQI 36 · 89.8% good
Claiborne County, Tennessee
AQI 36 · 96.3% good
Clark County, Illinois
AQI 36 · 92.1% good
Cobb County, Georgia
AQI 36 · 92.5% good
What Missaukee 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 36 means for exposure. Health guidance
- See how Missaukee County ranks against every monitored U.S. county on Good-day share. County rankings
- Compare Missaukee County with its Michigan neighbours before drawing a conclusion about the region. All of Michigan
Based on 293 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 Missaukee County, Michigan? ▼
Missaukee County has a median Air Quality Index (AQI) of 36, rated "Good." 90.8% of monitored days (266 out of 293) had good air quality in 2025.
What is the main pollutant in Missaukee County? ▼
The primary pollutant in Missaukee County is Ozone (O3), which was the main AQI driver on 247 days (84% of monitored days). Can trigger asthma, reduce lung function, and cause chest pain.
How many unhealthy air days does Missaukee County have? ▼
In 2025, Missaukee County recorded 0 unhealthy air days (0 Unhealthy, 0 Very Unhealthy, 0 Hazardous). The maximum AQI reached 92.
Is the air quality in Missaukee County getting better or worse? ▼
Air quality in Missaukee County is improving based on 5-year trends (2020-2025). Best year: 2024 with 337 good days. Worst year: 2023 with 203 good days.
What does AQI 36 mean for health? ▼
Missaukee County's median AQI of 36 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 Missaukee County compare to other counties in Michigan? ▼
Missaukee County has 90.8% good air days. Nearby counties in Michigan: Allegan (71.2% good), Bay (71.8% good), Benzie (91.1% good), Berrien (80.9% good), Cass (85.3% good), Clinton (90.2% good).
What is the 90th percentile AQI in Missaukee County? ▼
The 90th percentile AQI for Missaukee County is 49, meaning 90% of monitored days had an AQI at or below this level. The maximum AQI recorded was 92 (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.