EnviroNearby

Wayne County, Michigan air quality history

Daily Air Quality Index summaries from EPA monitors in Wayne, Michigan, 1980–2025.

36%
Good days in 2025
54
Median daily AQI, 2025
11
Days above 100 in 2025
365
Days with an AQI in 2025 (of 365)

In 2025, EPA reported a daily Air Quality Index (AQI) for Wayne, Michigan on 365 days. 132 of those days (36%) were in the Good range, and the median daily AQI was 54. That median is higher than the typical monitored county in Michigan (median 39 across 26 counties), and higher than the typical monitored U.S. county (40). The main pollutant was fine particles (PM2.5) on 299 days. Across the years with fuller monitoring, the share of Good days fell: an average of 46% in 1980–1982 versus 29% 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 138 of 366 days1980: Moderate 168 of 366 days1980: Unhealthy for Sensitive Groups 39 of 366 days1980: Unhealthy 20 of 366 days1980: Very Unhealthy 1 of 366 days19801981: Good 163 of 365 days1981: Moderate 156 of 365 days1981: Unhealthy for Sensitive Groups 31 of 365 days1981: Unhealthy 12 of 365 days1981: Very Unhealthy 3 of 365 days1982: Good 201 of 365 days1982: Moderate 133 of 365 days1982: Unhealthy for Sensitive Groups 23 of 365 days1982: Unhealthy 7 of 365 days1982: Very Unhealthy 1 of 365 days1983: Good 191 of 365 days1983: Moderate 133 of 365 days1983: Unhealthy for Sensitive Groups 27 of 365 days1983: Unhealthy 12 of 365 days1983: Very Unhealthy 2 of 365 days1984: Good 208 of 366 days1984: Moderate 130 of 366 days1984: Unhealthy for Sensitive Groups 23 of 366 days1984: Unhealthy 5 of 366 days1985: Good 251 of 365 days1985: Moderate 101 of 365 days1985: Unhealthy for Sensitive Groups 13 of 365 days19851986: Good 222 of 365 days1986: Moderate 132 of 365 days1986: Unhealthy for Sensitive Groups 8 of 365 days1986: Unhealthy 3 of 365 days1987: Good 213 of 365 days1987: Moderate 122 of 365 days1987: Unhealthy for Sensitive Groups 22 of 365 days1987: Unhealthy 7 of 365 days1987: Very Unhealthy 1 of 365 days1988: Good 171 of 366 days1988: Moderate 145 of 366 days1988: Unhealthy for Sensitive Groups 19 of 366 days1988: Unhealthy 24 of 366 days1988: Very Unhealthy 7 of 366 days1989: Good 182 of 365 days1989: Moderate 152 of 365 days1989: Unhealthy for Sensitive Groups 27 of 365 days1989: Unhealthy 3 of 365 days1989: Very Unhealthy 1 of 365 days1990: Good 212 of 365 days1990: Moderate 135 of 365 days1990: Unhealthy for Sensitive Groups 14 of 365 days1990: Unhealthy 4 of 365 days19901991: Good 238 of 365 days1991: Moderate 82 of 365 days1991: Unhealthy for Sensitive Groups 29 of 365 days1991: Unhealthy 15 of 365 days1991: Very Unhealthy 1 of 365 days1992: Good 273 of 366 days1992: Moderate 80 of 366 days1992: Unhealthy for Sensitive Groups 11 of 366 days1992: Unhealthy 2 of 366 days1993: Good 232 of 365 days1993: Moderate 121 of 365 days1993: Unhealthy for Sensitive Groups 8 of 365 days1993: Unhealthy 4 of 365 days1994: Good 196 of 365 days1994: Moderate 143 of 365 days1994: Unhealthy for Sensitive Groups 21 of 365 days1994: Unhealthy 3 of 365 days1994: Very Unhealthy 2 of 365 days1995: Good 232 of 365 days1995: Moderate 116 of 365 days1995: Unhealthy for Sensitive Groups 11 of 365 days1995: Unhealthy 6 of 365 days19951996: Good 216 of 366 days1996: Moderate 124 of 366 days1996: Unhealthy for Sensitive Groups 20 of 366 days1996: Unhealthy 6 of 366 days1997: Good 189 of 365 days1997: Moderate 153 of 365 days1997: Unhealthy for Sensitive Groups 16 of 365 days1997: Unhealthy 7 of 365 days1998: Good 222 of 365 days1998: Moderate 112 of 365 days1998: Unhealthy for Sensitive Groups 24 of 365 days1998: Unhealthy 7 of 365 days1999: Good 144 of 365 days1999: Moderate 176 of 365 days1999: Unhealthy for Sensitive Groups 31 of 365 days1999: Unhealthy 14 of 365 days2000: Good 78 of 366 days2000: Moderate 258 of 366 days2000: Unhealthy for Sensitive Groups 28 of 366 days2000: Unhealthy 2 of 366 days20002001: Good 68 of 365 days2001: Moderate 245 of 365 days2001: Unhealthy for Sensitive Groups 41 of 365 days2001: Unhealthy 11 of 365 days2002: Good 71 of 365 days2002: Moderate 253 of 365 days2002: Unhealthy for Sensitive Groups 30 of 365 days2002: Unhealthy 11 of 365 days2003: Good 61 of 365 days2003: Moderate 271 of 365 days2003: Unhealthy for Sensitive Groups 26 of 365 days2003: Unhealthy 7 of 365 days2004: Good 83 of 366 days2004: Moderate 260 of 366 days2004: Unhealthy for Sensitive Groups 22 of 366 days2004: Unhealthy 1 of 366 days2005: Good 82 of 365 days2005: Moderate 245 of 365 days2005: Unhealthy for Sensitive Groups 31 of 365 days2005: Unhealthy 7 of 365 days20052006: Good 107 of 365 days2006: Moderate 238 of 365 days2006: Unhealthy for Sensitive Groups 18 of 365 days2006: Unhealthy 1 of 365 days2006: Very Unhealthy 1 of 365 days2007: Good 92 of 365 days2007: Moderate 243 of 365 days2007: Unhealthy for Sensitive Groups 22 of 365 days2007: Unhealthy 8 of 365 days2008: Good 136 of 366 days2008: Moderate 218 of 366 days2008: Unhealthy for Sensitive Groups 11 of 366 days2008: Unhealthy 1 of 366 days2009: Good 147 of 365 days2009: Moderate 207 of 365 days2009: Unhealthy for Sensitive Groups 10 of 365 days2009: Unhealthy 1 of 365 days2010: Good 131 of 365 days2010: Moderate 219 of 365 days2010: Unhealthy for Sensitive Groups 15 of 365 days20102011: Good 113 of 365 days2011: Moderate 234 of 365 days2011: Unhealthy for Sensitive Groups 16 of 365 days2011: Unhealthy 2 of 365 days2012: Good 107 of 366 days2012: Moderate 225 of 366 days2012: Unhealthy for Sensitive Groups 31 of 366 days2012: Unhealthy 2 of 366 days2012: Very Unhealthy 1 of 366 days2013: Good 116 of 365 days2013: Moderate 246 of 365 days2013: Unhealthy for Sensitive Groups 3 of 365 days2014: Good 77 of 365 days2014: Moderate 280 of 365 days2014: Unhealthy for Sensitive Groups 8 of 365 days2015: Good 88 of 365 days2015: Moderate 270 of 365 days2015: Unhealthy for Sensitive Groups 7 of 365 days20152016: Good 99 of 366 days2016: Moderate 250 of 366 days2016: Unhealthy for Sensitive Groups 17 of 366 days2017: Good 103 of 365 days2017: Moderate 251 of 365 days2017: Unhealthy for Sensitive Groups 11 of 365 days2018: Good 105 of 365 days2018: Moderate 253 of 365 days2018: Unhealthy for Sensitive Groups 7 of 365 days2019: Good 81 of 365 days2019: Moderate 275 of 365 days2019: Unhealthy for Sensitive Groups 9 of 365 days2020: Good 118 of 366 days2020: Moderate 238 of 366 days2020: Unhealthy for Sensitive Groups 8 of 366 days2020: Unhealthy 2 of 366 days20202021: Good 86 of 365 days2021: Moderate 275 of 365 days2021: Unhealthy for Sensitive Groups 4 of 365 days2022: Good 63 of 365 days2022: Moderate 287 of 365 days2022: Unhealthy for Sensitive Groups 15 of 365 days2023: Good 70 of 365 days2023: Moderate 272 of 365 days2023: Unhealthy for Sensitive Groups 19 of 365 days2023: Unhealthy 3 of 365 days2023: Very Unhealthy 1 of 365 days2024: Good 120 of 366 days2024: Moderate 238 of 366 days2024: Unhealthy for Sensitive Groups 7 of 366 days2024: Unhealthy 1 of 366 days2025: Good 132 of 365 days2025: Moderate 222 of 365 days2025: Unhealthy for Sensitive Groups 8 of 365 days2025: Unhealthy 3 of 365 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 year0501001501980: 90th percentile AQI 1151981: 90th percentile AQI 1081982: 90th percentile AQI 971983: 90th percentile AQI 1081984: 90th percentile AQI 931985: 90th percentile AQI 771986: 90th percentile AQI 781987: 90th percentile AQI 931988: 90th percentile AQI 1331989: 90th percentile AQI 931990: 90th percentile AQI 811991: 90th percentile AQI 1121992: 90th percentile AQI 661993: 90th percentile AQI 731994: 90th percentile AQI 871995: 90th percentile AQI 761996: 90th percentile AQI 831997: 90th percentile AQI 911998: 90th percentile AQI 971999: 90th percentile AQI 1082000: 90th percentile AQI 962001: 90th percentile AQI 1122002: 90th percentile AQI 1022003: 90th percentile AQI 992004: 90th percentile AQI 902005: 90th percentile AQI 1012006: 90th percentile AQI 922007: 90th percentile AQI 972008: 90th percentile AQI 802009: 90th percentile AQI 772010: 90th percentile AQI 872011: 90th percentile AQI 842012: 90th percentile AQI 972013: 90th percentile AQI 732014: 90th percentile AQI 802015: 90th percentile AQI 802016: 90th percentile AQI 852017: 90th percentile AQI 822018: 90th percentile AQI 782019: 90th percentile AQI 772020: 90th percentile AQI 752021: 90th percentile AQI 842022: 90th percentile AQI 792023: 90th percentile AQI 892024: 90th percentile AQI 742025: 90th percentile AQI 751980: Median AQI 581981: Median AQI 521982: Median AQI 481983: Median AQI 491984: Median AQI 471985: Median AQI 421986: Median AQI 441987: Median AQI 451988: Median AQI 521989: Median AQI 511990: Median AQI 471991: Median AQI 441992: Median AQI 401993: Median AQI 441994: Median AQI 481995: Median AQI 431996: Median AQI 461997: Median AQI 491998: Median AQI 451999: Median AQI 562000: Median AQI 662001: Median AQI 682002: Median AQI 652003: Median AQI 652004: Median AQI 622005: Median AQI 632006: Median AQI 592007: Median AQI 602008: Median AQI 552009: Median AQI 542010: Median AQI 562011: Median AQI 562012: Median AQI 582013: Median AQI 552014: Median AQI 582015: Median AQI 572016: Median AQI 572017: Median AQI 572018: Median AQI 572019: Median AQI 582020: Median AQI 552021: Median AQI 582022: Median AQI 582023: Median AQI 612024: Median AQI 552025: Median AQI 541980198519901995200020052010201520202025
  • 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)29982%
Ozone6016%
Nitrogen dioxide (NO₂)31%
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
202536513222283005475156PM2.5
202436612023871005574181PM2.5
202336570272193106189226PM2.5
202236563287150005879131PM2.5
20213658627540005884118PM2.5
202036611823882005575188PM2.5
20193658127590005877142PM2.5
201836510525370005778133PM2.5
2017365103251110005782147PM2.5
201636699250170005785133PM2.5
20153658827070005780133PM2.5
20143657728080005880147PM2.5
201336511624630005573129PM2.5
2012366107225312105897208PM2.5
2011365113234162005684154PM2.5
2010365131219150005687140PM2.5
2009365147207101005477151PM2.5
2008366136218111005580184PM2.5
200736592243228006097179PM2.5
2006365107238181105992206PM2.5
2005365822453170063101169PM2.5
200436683260221006290151PM2.5
200336561271267006599195PM2.5
20023657125330110065102182PM2.5
20013656824541110068112179PM2.5
200036678258282006696156PM2.5
199936514417631140056108192PM2.5
1998365222112247004597195NO2
1997365189153167004991187NO2
1996366216124206004683169NO2
1995365232116116004376185NO2
1994365196143213204887203PM10
199336523212184004473197NO2
199236627380112004066154NO2
19913652388229151044112208Ozone
1990365212135144004781182NO2
1989365182152273105193201PM10
198836617114519247052133242Ozone
1987365213122227104593203Ozone
198636522213283004478179PM10
1985365251101130004277150Ozone
1984366208130235004793161NO2
198336519113327122049108219NO2
1982365201133237104897206Ozone
198136516315631123052108216NO2
198036613816839201058115204NO2

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 Michigan with a similar median AQI in 2025

All monitored counties in Michigan

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