EnviroNearby

Muskogee County, Oklahoma air quality history

Daily Air Quality Index summaries from EPA monitors in Muskogee, Oklahoma, 1986–2019.

87%
Good days in 2019
18
Median daily AQI, 2019
2
Days above 100 in 2019
134
Days with an AQI in 2019 (of 365)

In 2019, EPA reported a daily Air Quality Index (AQI) for Muskogee, Oklahoma on 134 days. 117 of those days (87%) were in the Good range, and the median daily AQI was 18. That median is lower than the typical monitored county in Oklahoma (median 42.5 across 20 counties), and lower than the typical monitored U.S. county (41). The main pollutant was coarse particles (PM10) on 134 days. Across the years with fuller monitoring, the share of Good days fell: an average of 96% in 1986–1988 versus 92% in 2017–2019.

EPA did not report an AQI for every day of 2019 here (134 of 365 days). Figures describe monitored days only; seasonal monitoring (for example, ozone measured only in warmer months) can make a county look cleaner or dirtier than a full-year record would.

The most recent year with data for this county is 2019; EPA's files for 2020–2025 contain no row for it, which usually means its monitors stopped reporting.

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%1986: Good 156 of 159 days1986: Moderate 3 of 159 days19861987: Good 297 of 301 days1987: Moderate 4 of 301 days1988: Good 275 of 299 days1988: Moderate 18 of 299 days1988: Unhealthy for Sensitive Groups 6 of 299 days1989: Good 347 of 349 days1989: Moderate 2 of 349 days1990: Good 267 of 268 days1990: Moderate 1 of 268 days1991: Good 278 of 283 days1991: Moderate 5 of 283 days19911992: Good 347 of 350 days1992: Moderate 3 of 350 days1993: Good 345 of 352 days1993: Moderate 7 of 352 days1994: Good 305 of 310 days1994: Moderate 5 of 310 days1995: Good 277 of 283 days1995: Moderate 5 of 283 days1995: Unhealthy for Sensitive Groups 1 of 283 days1996: Good 356 of 363 days1996: Moderate 7 of 363 days19961997: Good 347 of 357 days1997: Moderate 10 of 357 days1998: Good 272 of 359 days1998: Moderate 72 of 359 days1998: Unhealthy for Sensitive Groups 14 of 359 days1998: Unhealthy 1 of 359 days1999: Good 346 of 365 days1999: Moderate 19 of 365 days2000: Good 294 of 359 days2000: Moderate 65 of 359 days2001: Good 287 of 365 days2001: Moderate 78 of 365 days20012002: Good 268 of 365 days2002: Moderate 94 of 365 days2002: Unhealthy for Sensitive Groups 3 of 365 days2003: Good 275 of 365 days2003: Moderate 90 of 365 days2004: Good 278 of 359 days2004: Moderate 81 of 359 days2005: Good 243 of 338 days2005: Moderate 92 of 338 days2005: Unhealthy for Sensitive Groups 3 of 338 days2006: Good 278 of 356 days2006: Moderate 78 of 356 days20062007: Good 272 of 364 days2007: Moderate 91 of 364 days2007: Unhealthy for Sensitive Groups 1 of 364 days2008: Good 283 of 366 days2008: Moderate 83 of 366 days2009: Good 284 of 365 days2009: Moderate 81 of 365 days2010: Good 265 of 363 days2010: Moderate 98 of 363 days2011: Good 301 of 365 days2011: Moderate 64 of 365 days20112012: Good 300 of 322 days2012: Moderate 22 of 322 days2013: Good 347 of 363 days2013: Moderate 16 of 363 days2014: Good 267 of 309 days2014: Moderate 42 of 309 days2015: Good 294 of 304 days2015: Moderate 10 of 304 days2016: Good 350 of 355 days2016: Moderate 5 of 355 days20162017: Good 263 of 268 days2017: Moderate 5 of 268 days2018: Good 315 of 347 days2018: Moderate 30 of 347 days2018: Unhealthy for Sensitive Groups 1 of 347 days2018: Unhealthy 1 of 347 days2019: Good 117 of 134 days2019: Moderate 15 of 134 days2019: Unhealthy for Sensitive Groups 1 of 134 days2019: Unhealthy 1 of 134 days2019
  • 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 year0501001986: 90th percentile AQI 251987: 90th percentile AQI 301988: 90th percentile AQI 381989: 90th percentile AQI 331990: 90th percentile AQI 301991: 90th percentile AQI 321992: 90th percentile AQI 301993: 90th percentile AQI 331994: 90th percentile AQI 361995: 90th percentile AQI 321996: 90th percentile AQI 331997: 90th percentile AQI 331998: 90th percentile AQI 801999: 90th percentile AQI 332000: 90th percentile AQI 602001: 90th percentile AQI 642002: 90th percentile AQI 642003: 90th percentile AQI 612004: 90th percentile AQI 592005: 90th percentile AQI 652006: 90th percentile AQI 572007: 90th percentile AQI 602008: 90th percentile AQI 602009: 90th percentile AQI 622010: 90th percentile AQI 612011: 90th percentile AQI 582012: 90th percentile AQI 462013: 90th percentile AQI 402014: 90th percentile AQI 562015: 90th percentile AQI 382016: 90th percentile AQI 302017: 90th percentile AQI 372018: 90th percentile AQI 492019: 90th percentile AQI 571986: Median AQI 111987: Median AQI 121988: Median AQI 151989: Median AQI 181990: Median AQI 151991: Median AQI 151992: Median AQI 171993: Median AQI 191994: Median AQI 181995: Median AQI 171996: Median AQI 191997: Median AQI 181998: Median AQI 351999: Median AQI 192000: Median AQI 222001: Median AQI 222002: Median AQI 312003: Median AQI 262004: Median AQI 252005: Median AQI 352006: Median AQI 292007: Median AQI 312008: Median AQI 262009: Median AQI 362010: Median AQI 332011: Median AQI 292012: Median AQI 262013: Median AQI 192014: Median AQI 242015: Median AQI 192016: Median AQI 172017: Median AQI 202018: Median AQI 192019: Median AQI 1819861991199620012006201120162019
  • Median daily AQI
  • 90th-percentile daily AQI

Main pollutant by day, 2019

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
Coarse particles (PM10)134100%

Year-by-year data

Annual AQI summary by year
YearDays with AQIGoodModerateUnhealthy for Sensitive GroupsUnhealthyVery UnhealthyHazardousMedian AQI90th pct.Max AQIMain pollutant
20191341171511001857169PM10
20183473153011001949196PM10
201726826350000203763PM10
201635535050000173076PM10
2015304294100000193887PM10
2014309267420000245686PM10
2013363347160000194069PM10
2012322300220000264690PM10
2011365301640000295896PM10
2010363265980000336199PM10
2009365284810000366293Ozone
2008366283830000266098PM10
20073642729110003160104PM10
2006356278780000295799PM10
20053382439230003565106PM10
2004359278810000255997PM10
2003365275900000266196PM10
20023652689430003164111PM10
2001365287780000226493NO2
2000359294650000226097NO2
1999365346190000193376NO2
199835927272141003580151Ozone
1997357347100000183376NO2
199636335670000193373NO2
1995283277510001732125NO2
199431030550000183669NO2
199335234570000193382NO2
199235034730000173057NO2
199128327850000153260NO2
199026826710000153077NO2
198934934720000183354NO2
19882992751860001538142NO2
198730129740000123073NO2
198615915630000112568NO2

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 2019

All monitored counties in Oklahoma

Source: U.S. EPA AirData, “Annual AQI by County” files for 1986–2019 (EPA download page). EPA file dates: 2026-06-26. Imported into EnviroNearby November 5, 2026. How we use this data · Report a problem