Oklahoma · County air quality · 2025

Kiowa County, Oklahoma

Median AQI 43 (Good). 79.7% of monitored days rated Good, direct from EPA Air Quality System stations.

43
Median AQI
79.7%
Good-air days
0
Unhealthy days
55%
Cleaner than US counties

Kiowa County's 2025 annual median AQI is 43 (Good), with 79.7% Good days

According to the U.S. EPA Air Quality System, Kiowa County, Oklahoma posted a 2025 median AQI of 43 (Good) across 271 monitored days, with 79.7% 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
Kiowa County's 79.7% Good-day share places it cleaner than 55% of US counties in 2025.
Closest median-AQI peer
Ashtabula County (81.2% Good, median AQI 43) is the closest nationwide median-AQI peer to Kiowa County.
2021–2025 trend
Kiowa County's floor-qualifying Good-day share is stable from 2021 to 2025 (78.1% → 79.7%).
Median AQI
Median AQI: 43

According to the 2025 EPA AQS county release on PlainAirData, Kiowa County, Oklahoma ranks #631 of 951 by median AQI (43) and #424 by good-day share (79.7%). Ponce County, Puerto Rico is #1 of 951 by median AQI (3, 91.4% Good days) at good-day-share #159 ≠ largest of 7 at 100.0% Good days #1 by good-day share (100.0%, median AQI 9) at median-AQI #7.

Annual release change

What changed in the 2025 EPA annual release

2022 → 2025
  • Kiowa County's Good-day share rose from 72.0% to 79.7% between the 2022 and 2025 EPA annual releases, a change of +7.7 percentage points.
  • Kiowa County's peak single-day AQI fell from 115 to 97 between the 2022 and 2025 EPA annual releases, a change of -18 points.

Compared against 257 monitored days in 2022 and 271 in 2025. These are arithmetic differences between two stored EPA annual summaries, not a cause claim or a live advisory.

National release changes Two-year CSV

Data updated August 2026

Kiowa County AQI category distribution Stacked-segment bar showing the share of monitored days that fell in each EPA AQI category, Good, Moderate, USG, Unhealthy, Very Unhealthy, Hazardous, with median AQI marker. AQI category distribution 271 monitored days G M Median AQI 43 0 50 100 150 200 300 500 Kiowa County
  • Good · 216 d · 79.7%
  • Moderate · 55 d · 20.3%

How did Kiowa County's air break down in 2025?

Across 271 monitored days, 216 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 →
Kiowa County, Good days share 79.7%
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).

Where Kiowa County sits nationally

COUNT-derived placement among 951 US counties with at least 100 monitored days in 2025. Kiowa County's Good-day share is 79.7% - cleaner than 55% of that comparison set.

Kiowa County Good-day share vs. every US county

Share of monitored days in the Good band (AQI 0–50) - EPA AQS annual release

79.7% Cleaner than 55% higher than 55% of 951 US counties

0.0%–5.0%: 0 US counties (0%). Below this entry. 5.0%–10.0%: 1 US counties (0%). Below this entry. 10.0%–15.0%: 4 US counties (0%). Below this entry. 15.0%–20.0%: 4 US counties (0%). Below this entry. 20.0%–25.0%: 1 US counties (0%). Below this entry. 25.0%–30.0%: 5 US counties (1%). Below this entry. 30.0%–35.0%: 9 US counties (1%). Below this entry. 35.0%–40.0%: 4 US counties (0%). Below this entry. 40.0%–45.0%: 16 US counties (2%). Below this entry. 45.0%–50.0%: 16 US counties (2%). Below this entry. 50.0%–55.0%: 32 US counties (3%). Below this entry. 55.0%–60.0%: 50 US counties (5%). Below this entry. 60.0%–65.0%: 77 US counties (8%). Below this entry. 65.0%–70.0%: 93 US counties (10%). Below this entry. 70.0%–75.0%: 109 US counties (11%). Below this entry. 75.0%–80.0%: 114 US counties (12%). This entry sits in this band. 80.0%–85.0%: 123 US counties (13%). Above this entry. 85.0%–90.0%: 99 US counties (10%). Above this entry. 90.0%–95.0%: 117 US counties (12%). Above this entry. 95.0%–100.0%: 70 US counties (7%). Above this entry. 100.0%–105.0%: 7 US counties (1%). Above this entry. This county 0.0% 100% every floor-qualified US county, bucketed by value

Each bar is a band; taller bars hold more US counties. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.

Source U.S. Environmental Protection Agency, Air Quality System (AQS) · 2025

Pollutant Breakdown

Days where each pollutant was the primary driver of AQI readings in Kiowa County.

Kiowa County, Oklahoma criteria pollutant distribution Stratified-band visualization showing the share of monitored days each criteria pollutant (PM2.5, PM10, O3, NO2, CO) was the primary AQI driver. Ozone · 100.0% 0% 25% 50% 75% 100% Kiowa County, Oklahoma · 271 monitored days Criteria pollutant column
  • Ozone · 271 days · 100.0%

Health Impact Assessment

Good

Kiowa County's air quality is rated Good based on 79.7% good air days. No unhealthy air days were recorded in 2025.

Air quality was acceptable on 79.7% of monitored days in 2025, with a median AQI of 43. Unusually sensitive people can check real-time conditions at AirNow.gov during high-pollution events.

The dominant pollutant is Ozone, driving AQI on 271 of 271 monitored days.

5-Year Air Quality Trend

Air quality is stable in Kiowa County. Highest Good-day share: 2025 (79.7%, 216 of 271 monitored days).

Year Good Moderate USG Unhealthy Median AQI
2021 221 62 0 0 43
2022 185 70 2 0 44
2025 216 55 0 0 43

How does Kiowa County compare?

How Kiowa County compares

Good-day share better than typical
Kiowa County 79.7%
Ashtabula County, Ohio 81.2%
Typical US county 76.0%
Median AQI worse than typical
Kiowa County 43
Ashtabula County, Ohio 43
Typical US county 39
Unhealthy days / yr better than typical
Kiowa County 0
Ashtabula County, Ohio 0
Typical US county 1

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 Kiowa County, Oklahoma · 2020–2025

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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.