EnviroNearby

Adair County, Oklahoma air quality history

Daily Air Quality Index summaries from EPA monitors in Adair, Oklahoma, 2002–2025.

56%
Good days in 2025
48
Median daily AQI, 2025
2
Days above 100 in 2025
362
Days with an AQI in 2025 (of 365)

In 2025, EPA reported a daily Air Quality Index (AQI) for Adair, Oklahoma on 362 days. 202 of those days (56%) were in the Good range, and the median daily AQI was 48. That median is higher than the typical monitored county in Oklahoma (median 44 across 19 counties), and higher than the typical monitored U.S. county (40). The main pollutant was fine particles (PM2.5) on 227 days. Across the years with fuller monitoring, the share of Good days fell: an average of 73% in 2002–2004 versus 53% in 2023–2025.

How the days broke down each year

Each bar is one year. The colored segments show the share of monitored days that fell in each AQI category.

Share of monitored days in each AQI category, by year0%25%50%75%100%2002: Good 130 of 179 days2002: Moderate 36 of 179 days2002: Unhealthy for Sensitive Groups 12 of 179 days2002: Unhealthy 1 of 179 days20022003: Good 263 of 363 days2003: Moderate 89 of 363 days2003: Unhealthy for Sensitive Groups 10 of 363 days2003: Unhealthy 1 of 363 days2004: Good 261 of 356 days2004: Moderate 88 of 356 days2004: Unhealthy for Sensitive Groups 7 of 356 days20042005: Good 228 of 362 days2005: Moderate 118 of 362 days2005: Unhealthy for Sensitive Groups 16 of 362 days2006: Good 216 of 341 days2006: Moderate 101 of 341 days2006: Unhealthy for Sensitive Groups 23 of 341 days2006: Unhealthy 1 of 341 days20062007: Good 266 of 339 days2007: Moderate 67 of 339 days2007: Unhealthy for Sensitive Groups 6 of 339 days2008: Good 297 of 358 days2008: Moderate 61 of 358 days20082009: Good 202 of 358 days2009: Moderate 156 of 358 days2010: Good 90 of 365 days2010: Moderate 273 of 365 days2010: Unhealthy for Sensitive Groups 2 of 365 days20102011: Good 135 of 365 days2011: Moderate 216 of 365 days2011: Unhealthy for Sensitive Groups 14 of 365 days2012: Good 156 of 366 days2012: Moderate 195 of 366 days2012: Unhealthy for Sensitive Groups 14 of 366 days2012: Unhealthy 1 of 366 days20122013: Good 131 of 365 days2013: Moderate 231 of 365 days2013: Unhealthy for Sensitive Groups 3 of 365 days2014: Good 206 of 365 days2014: Moderate 157 of 365 days2014: Unhealthy for Sensitive Groups 1 of 365 days2014: Unhealthy 1 of 365 days20142015: Good 240 of 365 days2015: Moderate 125 of 365 days2016: Good 271 of 366 days2016: Moderate 95 of 366 days20162017: Good 238 of 362 days2017: Moderate 124 of 362 days2018: Good 263 of 365 days2018: Moderate 100 of 365 days2018: Unhealthy for Sensitive Groups 2 of 365 days20182019: Good 295 of 365 days2019: Moderate 70 of 365 days2020: Good 297 of 363 days2020: Moderate 65 of 363 days2020: Unhealthy 1 of 363 days20202021: Good 291 of 365 days2021: Moderate 73 of 365 days2021: Unhealthy for Sensitive Groups 1 of 365 days2022: Good 274 of 361 days2022: Moderate 83 of 361 days2022: Unhealthy for Sensitive Groups 4 of 361 days20222023: Good 172 of 365 days2023: Moderate 193 of 365 days2024: Good 209 of 366 days2024: Moderate 153 of 366 days2024: Unhealthy for Sensitive Groups 4 of 366 days20242025: Good 202 of 362 days2025: Moderate 158 of 362 days2025: Unhealthy 2 of 362 days2025
  • Good
  • Moderate
  • Unhealthy for Sensitive Groups
  • Unhealthy
  • Very Unhealthy
  • Hazardous

Typical and high-end AQI over time

The median is the middle day of the year. The 90th percentile is the level that only the highest 10% of days exceeded.

Median and 90th-percentile daily AQI, by year0501002002: 90th percentile AQI 972003: 90th percentile AQI 802004: 90th percentile AQI 742005: 90th percentile AQI 872006: 90th percentile AQI 932007: 90th percentile AQI 712008: 90th percentile AQI 582009: 90th percentile AQI 702010: 90th percentile AQI 802011: 90th percentile AQI 842012: 90th percentile AQI 842013: 90th percentile AQI 722014: 90th percentile AQI 642015: 90th percentile AQI 612016: 90th percentile AQI 572017: 90th percentile AQI 592018: 90th percentile AQI 612019: 90th percentile AQI 542020: 90th percentile AQI 552021: 90th percentile AQI 572022: 90th percentile AQI 582023: 90th percentile AQI 652024: 90th percentile AQI 642025: 90th percentile AQI 652002: Median AQI 402003: Median AQI 422004: Median AQI 412005: Median AQI 452006: Median AQI 442007: Median AQI 402008: Median AQI 382009: Median AQI 462010: Median AQI 602011: Median AQI 562012: Median AQI 532013: Median AQI 552014: Median AQI 462015: Median AQI 442016: Median AQI 432017: Median AQI 442018: Median AQI 422019: Median AQI 402020: Median AQI 362021: Median AQI 402022: Median AQI 432023: Median AQI 512024: Median AQI 472025: Median AQI 482002200420062008201020122014201620182020202220242025
  • Median daily AQI
  • 90th-percentile daily AQI

Main pollutant by day, 2025

On each monitored day, the AQI reflects whichever measured pollutant had the highest index. This counts how many days each pollutant set the AQI. A pollutant that was not measured here cannot appear.

PollutantDays as main pollutantShare of monitored days
Fine particles (PM2.5)22763%
Ozone13236%
Coarse particles (PM10)31%

Year-by-year data

Annual AQI summary by year
YearDays with AQIGoodModerateUnhealthy for Sensitive GroupsUnhealthyVery UnhealthyHazardousMedian AQI90th pct.Max AQIMain pollutant
202536220215802004865184PM2.5
202436620915340004764138PM2.5
202336517219300005165100PM2.5
20223612748340004358122Ozone
20213652917310004057117Ozone
20203632976501003655152PM2.5
2019365295700000405488Ozone
201836526310020004261145Ozone
20173622381240000445997PM2.5
2016366271950000435791Ozone
20153652401250000446193PM2.5
201436520615711004664198PM2.5
201336513123130005572105PM2.5
2012366156195141005384156Ozone
2011365135216140005684136Ozone
20103659027320006080105PM2.5
20093582021560000467096PM2.5
2008358297610000385893Ozone
20073392666760004071115Ozone
2006341216101231004493151Ozone
2005362228118160004587122Ozone
20043562618870004174133Ozone
200336326389101004280161Ozone
200217913036121004097151Ozone

What this data can and can’t tell you

It is a county-level summary. EPA reports one AQI per day for the county, based on the monitors operating there. Air at a particular street, school or home can differ, especially near roads, industry or wildfire smoke.

It is not a health assessment. The AQI is EPA’s scale for communicating daily air quality. A county’s history can’t tell you what the health risk is for any particular person. For daily conditions and health guidance, see AirNow.

Rules change over time. EPA has revised AQI breakpoints, most recently for fine particles in 2024, so some year-to-year change can reflect the scale rather than the air.

Counties in Oklahoma with a similar median AQI in 2025

All monitored counties in Oklahoma

Source: U.S. EPA AirData, “Annual AQI by County” files for 2002–2025 (EPA download page). EPA file dates: 2026-06-26. Imported into EnviroNearby November 5, 2026. How we use this data · Report a problem