EnviroNearby

Miami-Dade County, Florida air quality history

Daily Air Quality Index summaries from EPA monitors in Miami-Dade, Florida, 1980–2025.

56%
Good days in 2025
47
Median daily AQI, 2025
1
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 Miami-Dade, Florida on 365 days. 206 of those days (56%) were in the Good range, and the median daily AQI was 47. That median is higher than the typical monitored county in Florida (median 41 across 38 counties), and higher than the typical monitored U.S. county (40). The main pollutant was fine particles (PM2.5) on 272 days. Across the years with fuller monitoring, the share of Good days rose: an average of 41% in 1980–1982 versus 58% 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 205 of 343 days1980: Moderate 90 of 343 days1980: Unhealthy for Sensitive Groups 33 of 343 days1980: Unhealthy 14 of 343 days1980: Very Unhealthy 1 of 343 days19801981: Good 105 of 365 days1981: Moderate 181 of 365 days1981: Unhealthy for Sensitive Groups 64 of 365 days1981: Unhealthy 14 of 365 days1981: Very Unhealthy 1 of 365 days1982: Good 131 of 365 days1982: Moderate 198 of 365 days1982: Unhealthy for Sensitive Groups 29 of 365 days1982: Unhealthy 5 of 365 days1982: Very Unhealthy 2 of 365 days1983: Good 134 of 365 days1983: Moderate 207 of 365 days1983: Unhealthy for Sensitive Groups 23 of 365 days1983: Unhealthy 1 of 365 days1984: Good 212 of 366 days1984: Moderate 140 of 366 days1984: Unhealthy for Sensitive Groups 12 of 366 days1984: Unhealthy 2 of 366 days1985: Good 213 of 365 days1985: Moderate 133 of 365 days1985: Unhealthy for Sensitive Groups 14 of 365 days1985: Unhealthy 4 of 365 days1985: Very Unhealthy 1 of 365 days19851986: Good 183 of 365 days1986: Moderate 168 of 365 days1986: Unhealthy for Sensitive Groups 9 of 365 days1986: Unhealthy 4 of 365 days1986: Very Unhealthy 1 of 365 days1987: Good 223 of 365 days1987: Moderate 120 of 365 days1987: Unhealthy for Sensitive Groups 16 of 365 days1987: Unhealthy 5 of 365 days1987: Very Unhealthy 1 of 365 days1988: Good 219 of 366 days1988: Moderate 129 of 366 days1988: Unhealthy for Sensitive Groups 11 of 366 days1988: Unhealthy 7 of 366 days1989: Good 235 of 365 days1989: Moderate 113 of 365 days1989: Unhealthy for Sensitive Groups 13 of 365 days1989: Unhealthy 4 of 365 days1990: Good 269 of 365 days1990: Moderate 89 of 365 days1990: Unhealthy for Sensitive Groups 6 of 365 days1990: Unhealthy 1 of 365 days19901991: Good 313 of 365 days1991: Moderate 47 of 365 days1991: Unhealthy for Sensitive Groups 5 of 365 days1992: Good 284 of 363 days1992: Moderate 65 of 363 days1992: Unhealthy for Sensitive Groups 11 of 363 days1992: Unhealthy 3 of 363 days1993: Good 272 of 365 days1993: Moderate 76 of 365 days1993: Unhealthy for Sensitive Groups 12 of 365 days1993: Unhealthy 5 of 365 days1994: Good 289 of 365 days1994: Moderate 66 of 365 days1994: Unhealthy for Sensitive Groups 9 of 365 days1994: Unhealthy 1 of 365 days1995: Good 285 of 365 days1995: Moderate 66 of 365 days1995: Unhealthy for Sensitive Groups 12 of 365 days1995: Unhealthy 2 of 365 days19951996: Good 270 of 366 days1996: Moderate 88 of 366 days1996: Unhealthy for Sensitive Groups 7 of 366 days1996: Unhealthy 1 of 366 days1997: Good 263 of 365 days1997: Moderate 92 of 365 days1997: Unhealthy for Sensitive Groups 8 of 365 days1997: Unhealthy 2 of 365 days1998: Good 247 of 365 days1998: Moderate 90 of 365 days1998: Unhealthy for Sensitive Groups 20 of 365 days1998: Unhealthy 8 of 365 days1999: Good 153 of 365 days1999: Moderate 192 of 365 days1999: Unhealthy for Sensitive Groups 13 of 365 days1999: Unhealthy 7 of 365 days2000: Good 144 of 366 days2000: Moderate 207 of 366 days2000: Unhealthy for Sensitive Groups 15 of 366 days20002001: Good 164 of 365 days2001: Moderate 194 of 365 days2001: Unhealthy for Sensitive Groups 6 of 365 days2001: Unhealthy 1 of 365 days2002: Good 182 of 365 days2002: Moderate 181 of 365 days2002: Unhealthy for Sensitive Groups 2 of 365 days2003: Good 89 of 365 days2003: Moderate 272 of 365 days2003: Unhealthy for Sensitive Groups 3 of 365 days2003: Unhealthy 1 of 365 days2004: Good 72 of 366 days2004: Moderate 286 of 366 days2004: Unhealthy for Sensitive Groups 5 of 366 days2004: Unhealthy 3 of 366 days2005: Good 58 of 365 days2005: Moderate 300 of 365 days2005: Unhealthy for Sensitive Groups 6 of 365 days2005: Unhealthy 1 of 365 days20052006: Good 54 of 365 days2006: Moderate 302 of 365 days2006: Unhealthy for Sensitive Groups 8 of 365 days2006: Unhealthy 1 of 365 days2007: Good 98 of 365 days2007: Moderate 258 of 365 days2007: Unhealthy for Sensitive Groups 9 of 365 days2008: Good 123 of 366 days2008: Moderate 236 of 366 days2008: Unhealthy for Sensitive Groups 6 of 366 days2008: Unhealthy 1 of 366 days2009: Good 149 of 365 days2009: Moderate 213 of 365 days2009: Unhealthy for Sensitive Groups 3 of 365 days2010: Good 126 of 365 days2010: Moderate 235 of 365 days2010: Unhealthy for Sensitive Groups 4 of 365 days20102011: Good 154 of 365 days2011: Moderate 207 of 365 days2011: Unhealthy for Sensitive Groups 4 of 365 days2012: Good 144 of 366 days2012: Moderate 220 of 366 days2012: Unhealthy for Sensitive Groups 2 of 366 days2013: Good 189 of 365 days2013: Moderate 174 of 365 days2013: Unhealthy for Sensitive Groups 2 of 365 days2014: Good 161 of 365 days2014: Moderate 203 of 365 days2014: Unhealthy for Sensitive Groups 1 of 365 days2015: Good 201 of 365 days2015: Moderate 164 of 365 days20152016: Good 153 of 360 days2016: Moderate 204 of 360 days2016: Unhealthy for Sensitive Groups 3 of 360 days2017: Good 177 of 354 days2017: Moderate 173 of 354 days2017: Unhealthy for Sensitive Groups 4 of 354 days2018: Good 194 of 365 days2018: Moderate 167 of 365 days2018: Unhealthy for Sensitive Groups 4 of 365 days2019: Good 245 of 363 days2019: Moderate 116 of 363 days2019: Unhealthy for Sensitive Groups 2 of 363 days2020: Good 226 of 366 days2020: Moderate 140 of 366 days20202021: Good 230 of 365 days2021: Moderate 133 of 365 days2021: Unhealthy for Sensitive Groups 2 of 365 days2022: Good 259 of 365 days2022: Moderate 104 of 365 days2022: Unhealthy for Sensitive Groups 2 of 365 days2023: Good 207 of 365 days2023: Moderate 155 of 365 days2023: Unhealthy 3 of 365 days2024: Good 219 of 366 days2024: Moderate 143 of 366 days2024: Unhealthy for Sensitive Groups 1 of 366 days2024: Unhealthy 3 of 366 days2025: Good 206 of 365 days2025: Moderate 158 of 365 days2025: Unhealthy for Sensitive Groups 1 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 1251982: 90th percentile AQI 1001983: 90th percentile AQI 971984: 90th percentile AQI 841985: 90th percentile AQI 801986: 90th percentile AQI 801987: 90th percentile AQI 801988: 90th percentile AQI 801989: 90th percentile AQI 801990: 90th percentile AQI 641991: 90th percentile AQI 541992: 90th percentile AQI 691993: 90th percentile AQI 671994: 90th percentile AQI 671995: 90th percentile AQI 671996: 90th percentile AQI 641997: 90th percentile AQI 671998: 90th percentile AQI 841999: 90th percentile AQI 842000: 90th percentile AQI 742001: 90th percentile AQI 672002: 90th percentile AQI 632003: 90th percentile AQI 692004: 90th percentile AQI 742005: 90th percentile AQI 772006: 90th percentile AQI 762007: 90th percentile AQI 762008: 90th percentile AQI 672009: 90th percentile AQI 642010: 90th percentile AQI 642011: 90th percentile AQI 632012: 90th percentile AQI 662013: 90th percentile AQI 612014: 90th percentile AQI 632015: 90th percentile AQI 632016: 90th percentile AQI 672017: 90th percentile AQI 642018: 90th percentile AQI 612019: 90th percentile AQI 572020: 90th percentile AQI 622021: 90th percentile AQI 612022: 90th percentile AQI 592023: 90th percentile AQI 632024: 90th percentile AQI 612025: 90th percentile AQI 611980: Median AQI 431981: Median AQI 691982: Median AQI 581983: Median AQI 591984: Median AQI 461985: Median AQI 461986: Median AQI 501987: Median AQI 441988: Median AQI 451989: Median AQI 441990: Median AQI 421991: Median AQI 371992: Median AQI 391993: Median AQI 401994: Median AQI 391995: Median AQI 411996: Median AQI 421997: Median AQI 421998: Median AQI 431999: Median AQI 532000: Median AQI 532001: Median AQI 522002: Median AQI 512003: Median AQI 552004: Median AQI 562005: Median AQI 572006: Median AQI 572007: Median AQI 542008: Median AQI 532009: Median AQI 522010: Median AQI 532011: Median AQI 522012: Median AQI 522013: Median AQI 492014: Median AQI 522015: Median AQI 492016: Median AQI 522017: Median AQI 512018: Median AQI 492019: Median AQI 442020: Median AQI 452021: Median AQI 462022: Median AQI 442023: Median AQI 482024: Median AQI 482025: Median AQI 471980198519901995200020052010201520202025
  • 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)27275%
Ozone7922%
Nitrogen dioxide (NO₂)144%

Year-by-year data

Annual AQI summary by year
YearDays with AQIGoodModerateUnhealthy for Sensitive GroupsUnhealthyVery UnhealthyHazardousMedian AQI90th pct.Max AQIMain pollutant
202536520615810004761113PM2.5
202436621914313004861197PM2.5
202336520715503004863170PM2.5
202236525910420004459136PM2.5
202136523013320004661135PM2.5
20203662261400000456290PM2.5
201936324511620004457146PM2.5
201836519416740004961126PM2.5
201735417717340005164136PM2.5
201636015320430005267144PM2.5
20153652011640000496387PM2.5
201436516120310005263123PM2.5
201336518917420004961119PM2.5
201236614422020005266136PM2.5
201136515420740005263129PM2.5
201036512623540005364150PM2.5
200936514921330005264119PM2.5
200836612323661005367157PM2.5
20073659825890005476126PM2.5
20063655430281005776187PM2.5
20053655830061005777164PM2.5
20043667228653005674162PM2.5
20033658927231005569164PM2.5
200236518218120005163135PM2.5
200136516419461005267179PM2.5
2000366144207150005374147PM2.5
1999365153192137005384172PM2.5
199836524790208004384185Ozone
19973652639282004267156Ozone
19963662708871004264182Ozone
199536528566122004167156Ozone
19943652896691003967154Ozone
199336527276125004067192Ozone
199236328465113003969179Ozone
19913653134750003754150Ozone
19903652698961004264164Ozone
1989365235113134004480166Ozone
1988366219129117004580190Ozone
1987365223120165104480214CO
198636518316894105080228CO
1985365213133144104680205CO
1984366212140122004684195CO
1983365134207231005997182CO
19823651311982952058100216CO
198136510518164141069125224CO
19803432059033141043115205Ozone

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 Florida with a similar median AQI in 2025

All monitored counties in Florida

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