EnviroNearby

Greene County, Missouri air quality history

Daily Air Quality Index summaries from EPA monitors in Greene, Missouri, 1980–2025.

63%
Good days in 2025
45
Median daily AQI, 2025
4
Days above 100 in 2025
364
Days with an AQI in 2025 (of 365)

In 2025, EPA reported a daily Air Quality Index (AQI) for Greene, Missouri on 364 days. 228 of those days (63%) were in the Good range, and the median daily AQI was 45. That median is higher than the typical monitored county in Missouri (median 41 across 19 counties), and higher than the typical monitored U.S. county (40). The main pollutant was fine particles (PM2.5) on 232 days. Across the years with fuller monitoring, the share of Good days fell: an average of 87% in 1980–1982 versus 59% 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%1980: Good 130 of 179 days1980: Moderate 38 of 179 days1980: Unhealthy for Sensitive Groups 10 of 179 days1980: Unhealthy 1 of 179 days19801981: Good 269 of 293 days1981: Moderate 24 of 293 days1982: Good 173 of 180 days1982: Moderate 7 of 180 days1983: Good 301 of 353 days1983: Moderate 42 of 353 days1983: Unhealthy for Sensitive Groups 9 of 353 days1983: Unhealthy 1 of 353 days1984: Good 285 of 365 days1984: Moderate 70 of 365 days1984: Unhealthy for Sensitive Groups 9 of 365 days1984: Unhealthy 1 of 365 days1985: Good 305 of 365 days1985: Moderate 56 of 365 days1985: Unhealthy for Sensitive Groups 4 of 365 days19851986: Good 278 of 365 days1986: Moderate 70 of 365 days1986: Unhealthy for Sensitive Groups 14 of 365 days1986: Unhealthy 3 of 365 days1987: Good 286 of 365 days1987: Moderate 67 of 365 days1987: Unhealthy for Sensitive Groups 12 of 365 days1988: Good 257 of 366 days1988: Moderate 85 of 366 days1988: Unhealthy for Sensitive Groups 21 of 366 days1988: Unhealthy 3 of 366 days1989: Good 290 of 365 days1989: Moderate 64 of 365 days1989: Unhealthy for Sensitive Groups 11 of 365 days1990: Good 333 of 365 days1990: Moderate 31 of 365 days1990: Unhealthy for Sensitive Groups 1 of 365 days19901991: Good 331 of 365 days1991: Moderate 33 of 365 days1991: Unhealthy for Sensitive Groups 1 of 365 days1992: Good 331 of 366 days1992: Moderate 33 of 366 days1992: Unhealthy for Sensitive Groups 1 of 366 days1992: Unhealthy 1 of 366 days1993: Good 307 of 365 days1993: Moderate 54 of 365 days1993: Unhealthy for Sensitive Groups 4 of 365 days1994: Good 248 of 365 days1994: Moderate 105 of 365 days1994: Unhealthy for Sensitive Groups 12 of 365 days1995: Good 259 of 365 days1995: Moderate 79 of 365 days1995: Unhealthy for Sensitive Groups 24 of 365 days1995: Unhealthy 3 of 365 days19951996: Good 247 of 366 days1996: Moderate 87 of 366 days1996: Unhealthy for Sensitive Groups 32 of 366 days1997: Good 298 of 365 days1997: Moderate 66 of 365 days1997: Unhealthy for Sensitive Groups 1 of 365 days1998: Good 288 of 365 days1998: Moderate 71 of 365 days1998: Unhealthy for Sensitive Groups 5 of 365 days1998: Unhealthy 1 of 365 days1999: Good 217 of 365 days1999: Moderate 134 of 365 days1999: Unhealthy for Sensitive Groups 12 of 365 days1999: Unhealthy 1 of 365 days1999: Very Unhealthy 1 of 365 days2000: Good 219 of 366 days2000: Moderate 132 of 366 days2000: Unhealthy for Sensitive Groups 15 of 366 days20002001: Good 229 of 365 days2001: Moderate 126 of 365 days2001: Unhealthy for Sensitive Groups 9 of 365 days2001: Unhealthy 1 of 365 days2002: Good 233 of 365 days2002: Moderate 117 of 365 days2002: Unhealthy for Sensitive Groups 15 of 365 days2003: Good 231 of 365 days2003: Moderate 128 of 365 days2003: Unhealthy for Sensitive Groups 6 of 365 days2004: Good 275 of 366 days2004: Moderate 90 of 366 days2004: Unhealthy for Sensitive Groups 1 of 366 days2005: Good 231 of 365 days2005: Moderate 121 of 365 days2005: Unhealthy for Sensitive Groups 13 of 365 days20052006: Good 229 of 365 days2006: Moderate 126 of 365 days2006: Unhealthy for Sensitive Groups 9 of 365 days2006: Unhealthy 1 of 365 days2007: Good 245 of 365 days2007: Moderate 111 of 365 days2007: Unhealthy for Sensitive Groups 7 of 365 days2007: Unhealthy 2 of 365 days2008: Good 255 of 366 days2008: Moderate 109 of 366 days2008: Unhealthy for Sensitive Groups 2 of 366 days2009: Good 282 of 365 days2009: Moderate 82 of 365 days2009: Unhealthy for Sensitive Groups 1 of 365 days2010: Good 213 of 325 days2010: Moderate 111 of 325 days2010: Unhealthy for Sensitive Groups 1 of 325 days20102011: Good 147 of 322 days2011: Moderate 167 of 322 days2011: Unhealthy for Sensitive Groups 8 of 322 days2012: Good 138 of 366 days2012: Moderate 208 of 366 days2012: Unhealthy for Sensitive Groups 20 of 366 days2013: Good 218 of 360 days2013: Moderate 142 of 360 days2014: Good 208 of 365 days2014: Moderate 157 of 365 days2015: Good 234 of 358 days2015: Moderate 124 of 358 days20152016: Good 262 of 366 days2016: Moderate 104 of 366 days2017: Good 243 of 365 days2017: Moderate 122 of 365 days2018: Good 242 of 365 days2018: Moderate 123 of 365 days2019: Good 262 of 365 days2019: Moderate 103 of 365 days2020: Good 268 of 364 days2020: Moderate 95 of 364 days2020: Unhealthy for Sensitive Groups 1 of 364 days20202021: Good 300 of 365 days2021: Moderate 65 of 365 days2022: Good 202 of 365 days2022: Moderate 163 of 365 days2023: Good 188 of 365 days2023: Moderate 171 of 365 days2023: Unhealthy for Sensitive Groups 6 of 365 days2024: Good 232 of 366 days2024: Moderate 134 of 366 days2025: Good 228 of 364 days2025: Moderate 132 of 364 days2025: Unhealthy for Sensitive Groups 3 of 364 days2025: Unhealthy 1 of 364 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 year0501001980: 90th percentile AQI 871981: 90th percentile AQI 481982: 90th percentile AQI 441983: 90th percentile AQI 641984: 90th percentile AQI 711985: 90th percentile AQI 671986: 90th percentile AQI 801987: 90th percentile AQI 771988: 90th percentile AQI 901989: 90th percentile AQI 641990: 90th percentile AQI 491991: 90th percentile AQI 501992: 90th percentile AQI 501993: 90th percentile AQI 581994: 90th percentile AQI 871995: 90th percentile AQI 931996: 90th percentile AQI 931997: 90th percentile AQI 611998: 90th percentile AQI 771999: 90th percentile AQI 852000: 90th percentile AQI 772001: 90th percentile AQI 772002: 90th percentile AQI 772003: 90th percentile AQI 712004: 90th percentile AQI 602005: 90th percentile AQI 812006: 90th percentile AQI 742007: 90th percentile AQI 772008: 90th percentile AQI 672009: 90th percentile AQI 612010: 90th percentile AQI 772011: 90th percentile AQI 792012: 90th percentile AQI 842013: 90th percentile AQI 622014: 90th percentile AQI 642015: 90th percentile AQI 612016: 90th percentile AQI 572017: 90th percentile AQI 582018: 90th percentile AQI 592019: 90th percentile AQI 572020: 90th percentile AQI 572021: 90th percentile AQI 552022: 90th percentile AQI 642023: 90th percentile AQI 682024: 90th percentile AQI 602025: 90th percentile AQI 621980: Median AQI 391981: Median AQI 311982: Median AQI 281983: Median AQI 321984: Median AQI 361985: Median AQI 381986: Median AQI 381987: Median AQI 381988: Median AQI 401989: Median AQI 391990: Median AQI 361991: Median AQI 351992: Median AQI 321993: Median AQI 381994: Median AQI 451995: Median AQI 421996: Median AQI 431997: Median AQI 381998: Median AQI 381999: Median AQI 462000: Median AQI 462001: Median AQI 452002: Median AQI 432003: Median AQI 412004: Median AQI 392005: Median AQI 432006: Median AQI 442007: Median AQI 432008: Median AQI 422009: Median AQI 392010: Median AQI 442011: Median AQI 532012: Median AQI 552013: Median AQI 462014: Median AQI 462015: Median AQI 432016: Median AQI 422017: Median AQI 442018: Median AQI 442019: Median AQI 432020: Median AQI 402021: Median AQI 382022: Median AQI 492023: Median AQI 492024: Median AQI 452025: Median AQI 451980198519901995200020052010201520202025
  • 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)23264%
Ozone12935%
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
202536422813231004562160PM2.5
20243662321340000456090PM2.5
202336518817160004968122PM2.5
202236520216300004964100PM2.5
2021365300650000385584Ozone
20203642689510004057116PM2.5
20193652621030000435777PM2.5
20183652421230000445993PM2.5
20173652431220000445880PM2.5
20163662621040000425771PM2.5
20153582341240000436180PM2.5
20143652081570000466487PM2.5
20133602181420000466297PM2.5
2012366138208200005584150PM2.5
201132214716780005379143PM2.5
201032521311110004477101Ozone
20093652828210003961115Ozone
200836625510920004267129Ozone
200736524511172004377161Ozone
200636522912691004474151Ozone
2005365231121130004381143Ozone
20043662759010003960119Ozone
200336523112860004171150Ozone
2002365233117150004377150Ozone
200136522912691004577151Ozone
2000366219132150004677150Ozone
1999365217134121104685204Ozone
19983652887151003877166Ozone
19973652986610003861129Ozone
199636624787320004393150Ozone
199536525979243004293174Ozone
1994365248105120004587150Ozone
19933653075440003858119Ozone
19923663313311003250159Ozone
19913653313310003550115Ozone
19903653333110003649108Ozone
198936529064110003964126Ozone
198836625785213004090182Ozone
198736528667120003877140Ozone
198636527870143003880156Ozone
19853653055640003867140Ozone
19843652857091003671166Ozone
19833533014291003264151Ozone
198218017370000284490Ozone
19812932692400003148100Ozone
198017913038101003987156Ozone

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 Missouri with a similar median AQI in 2025

All monitored counties in Missouri

Source: U.S. EPA AirData, “Annual AQI by County” files for 1980–2025 (EPA download page). EPA file dates: 2026-06-26. Imported into EnviroNearby November 5, 2026. How we use this data · Report a problem