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Muskogee, OK Air Quality

EPA monitor data through 2020 · Updated September 02, 2026 · Methods

This area's record ends with 2020 (a partial year: 233 days of monitoring data): EPA's air quality files carry no 2021–2025 data for it, usually because local monitors stopped reporting. This page is current with the data that exists.

In 2020, Muskogee, OK recorded 0 days above an Air Quality Index of 100, the level at which EPA begins warning sensitive groups, out of 233 days with monitoring data. Under the AQI rules that applied before 2013, the same air would have scored 0 days.

Unhealthy days, 2020

AQI above 100

Same air, pre-2013 rules

for comparison with older reports

Good-air days

117

AQI 50 or below

Days monitored

233

partial coverage

Unhealthy days by year, scored two ways

EPA changed what an AQI of 100 means in 2013 and again in 2015, so a count published before those changes is not comparable to one published after. Each panel below applies a single fixed rulebook to every year, so each is internally consistent. Why this matters.

Scored by today's rules

Scored by the pre-2013 rules

Faded columns mark years with fewer than 300 monitored days, where the count is not comparable.

What 2019 looked like

Air quality category	Days	Share of days with an AQI
Good	117	87%
Moderate	15	11%
Unhealthy for sensitive groups	1	1%
Unhealthy or worse	1	1%

Median AQI None · 90th-percentile AQI None · worst day None. Scored under current rules, out of 134 days with an AQI.

Statewide context

Muskogee, OK sits in Oklahoma.

Days in each air quality category, by year

How many days fell in each AQI category, for every year with an AQI on record. Categories are scored under EPA's current breakpoints. A year with fewer than 300 days is marked, because a short year lowers every count for reasons that have nothing to do with the air.

Year	Good	Moderate	Unhealthy for sensitive groups	Unhealthy or worse	Days with an AQI
2000	297	65	0	0	362
2001	287	78	0	0	365
2002	268	94	3	0	365
2003	275	90	0	0	365
2004	278	81	0	0	359
2005	243	92	3	0	338
2006	278	78	0	0	356
2007	272	91	1	0	364
2008	283	83	0	0	366
2009	284	81	0	0	365
2010	265	98	0	0	363
2011	301	64	0	0	365
2012	300	22	0	0	322
2013	347	16	0	0	363
2014	267	42	0	0	309
2015	294	10	0	0	304
2016	350	5	0	0	355
2017 (partial)	263	5	0	0	268
2018	315	30	1	1	347
2019 (partial)	117	15	1	1	134

Good is AQI 0–50, Moderate 51–100, Unhealthy for sensitive groups 101–150. “Unhealthy or worse” combines the Unhealthy, Very Unhealthy and Hazardous categories, which are shown together because most areas record too few of each to report separately. The four columns sum to the last one by construction. 1 year with monitoring but no AQI is omitted. These counts exclude sulphur dioxide, following EPA, which drops SO₂ from county and metro summaries because it is too localized to describe a whole area.

The full series

The same years scored two ways, with the pollutant that drove the days above 100. EPA's files record which pollutant set each day's AQI; they do not attribute days to wildfire smoke, so no column here claims to.

Year	Unhealthy days, current rules	Of which ozone	Of which fine particles	Pre-2013 rules	Days monitored
2000	0	0	0	0	366
2001	0	0	0	0	365
2002	3	0	1	2	365
2003	0	0	0	0	365
2004	0	0	0	0	365
2005	3	0	2	1	365
2006	0	0	0	0	363
2007	1	0	1	0	365
2008	0	0	0	0	366
2009	0	0	0	0	365
2010	0	0	0	0	365
2011	0	0	0	0	365
2012	0	0	0	0	334
2013	0	0	0	0	365
2014	0	0	0	0	363
2015	0	0	0	0	365
2016	0	0	0	0	364
2017	0	0	0	0	363
2018	2	0	0	2	365
2019	2	0	0	2	291
2020	0	—	—	0	233

Sources

EPA AirData daily monitor files, recomputed under both breakpoint tables. Methods and validation.
Download the full dataset for every state and metro.