Median AQI
44
Good
Oklahoma · County air quality · 2025
Kiowa County, Oklahoma
Median AQI 44 (Good). 77.1% of monitored days rated Good, direct from EPA Air Quality System stations.
- 44
- Median AQI
- 77.1%
- Good-air days
- 0
- Unhealthy days
- 44%
- Cleaner than US counties
The verdict
According to EPA Air Quality System monitoring data, Kiowa County's air is good on balance, more polluted than the median US county, a median AQI of 44 with 77.1% of 210 monitored days in the Good band, driven mainly by Ozone.
- 44
- median AQI · Good
- 77.1%
- days rated Good
- Ozone
- main pollutant
- 44%
- cleaner than US counties
Not one day crossed into the Unhealthy tier; the worst single reading was AQI 97.
Data updated July 2026
- Good · 162 d · 77.1%
- Moderate · 48 d · 22.9%
How did Kiowa County's air break down in 2025?
Across 210 monitored days, 162 fell in the Good band (AQI 0–50) and 0 reached Unhealthy or worse. The worst single day peaked at AQI 97 (Moderate).
EPA AQS →Air quality data from EPA Air Quality System (2025). 210 days monitored. Median AQI: 44 (Good).
Insights: Kiowa County, Oklahoma. EPA monitors recorded a median Air Quality Index of 44 across 210 measured days in 2025, earning a Good classification and a Good health grade. Of those days, 162 (77%) fell in the Good band (AQI 0–50), 48 (23%) registered Moderate readings, and 0 (0%) reached Unhealthy for Sensitive Groups. The 90th-percentile AQI settled at 64, while the worst single-day peak hit 97 (Moderate). Residents averaged about 23.1 clean-air days per 30-day window during the monitoring year.
The full pollutant mix ranks as Ozone (210 days). Across the 2021–2025 trend window, good days shifted by -59 and the median AQI moved +1 points, placing the multi-year trajectory at stable. The worst single reading over the 2021–2025 window was AQI 97, moderate but never Unhealthy. Nearby counties show comparable readings: Adair (59.2% good, AQI 45); Canadian (78.0% good, AQI 44); Carter (80.9% good, AQI 33); Cleveland (53.7% good, AQI 49); Comanche (63.8% good, AQI 45); Creek (80.1% good, AQI 43).
Air Quality Summary
Good Days
77.1%
162 of 210 monitored days
2.1pp vs 75% target
Max AQI Recorded
97
Moderate
Health Grade
Good
90th-pct AQI 64
Kiowa County, Good days share 77.1%
National avg
Share of monitored days at AQI 0-50 (Good band).
Kiowa 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
162
77%
Moderate
48
23%
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 Kiowa County.
- Ozone · 210 days · 100.0%
Health Impact Assessment
Good
Kiowa County's air quality is rated Good based on 77.1% good air days. No unhealthy air days were recorded in 2025.
Air quality was acceptable on 77.1% 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 Ozone, driving AQI on 210 of 210 monitored days.
5-Year Air Quality Trend
Air quality is stable in Kiowa County. Best year: 2021 (221 good days).
| Year | Good | Moderate | USG | Unhealthy | Median AQI | Max AQI |
|---|---|---|---|---|---|---|
| 2021 | 221 | 62 | 0 | 0 | 43 | 100 |
| 2022 | 185 | 70 | 2 | 0 | 44 | 115 |
| 2025 | 162 | 48 | 0 | 0 | 44 | 97 |
How does Kiowa County compare?
How Kiowa County compares
Good-day share better than US avg
Kiowa County 77.1%
Adair County, Oklahoma 59.2%
US average 76.5%
Median AQI worse than US avg
Kiowa County 44
Adair County, Oklahoma 45
US average 38
Unhealthy days / yr about average
Kiowa County 0
Adair County, Oklahoma 2
US average 0
Other Counties in Oklahoma
Air quality comparison for nearby counties in Oklahoma.
Counties with Similar Air Quality
Counties across the US with a similar median AQI to Kiowa 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
Bolivar County, Mississippi
AQI 44 · 70.3% good
Brewster County, Texas
AQI 44 · 69.0% good
What Kiowa 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 44 means for exposure. Health guidance
- See how Kiowa County ranks against every monitored U.S. county on Good-day share. County rankings
- Compare Kiowa County with its Oklahoma neighbours before drawing a conclusion about the region. All of Oklahoma
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 Kiowa County, Oklahoma? ▼
Kiowa County has a median Air Quality Index (AQI) of 44, rated "Good." 77.1% of monitored days (162 out of 210) had good air quality in 2025.
What is the main pollutant in Kiowa County? ▼
The primary pollutant in Kiowa 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 Kiowa County have? ▼
In 2025, Kiowa County recorded 0 unhealthy air days (0 Unhealthy, 0 Very Unhealthy, 0 Hazardous). The maximum AQI reached 97.
Is the air quality in Kiowa County getting better or worse? ▼
Air quality in Kiowa County is stable based on 5-year trends (2021-2025). Best year: 2021 with 221 good days. Worst year: 2025 with 162 good days.
What does AQI 44 mean for health? ▼
Kiowa 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 Kiowa County compare to other counties in Oklahoma? ▼
Kiowa County has 77.1% good air days. Nearby counties in Oklahoma: Adair (59.2% good), Canadian (78.0% good), Carter (80.9% good), Cleveland (53.7% good), Comanche (63.8% good), Creek (80.1% good).
What is the 90th percentile AQI in Kiowa County? ▼
The 90th percentile AQI for Kiowa County is 64, meaning 90% of monitored days had an AQI at or below this level. The maximum AQI recorded was 97 (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.