EnviroNearby

Sullivan County, Tennessee air quality history

Daily Air Quality Index summaries from EPA monitors in Sullivan, Tennessee, 1980–2025.

82%
Good days in 2025
40
Median daily AQI, 2025
0
Days above 100 in 2025
361
Days with an AQI in 2025 (of 365)

In 2025, EPA reported a daily Air Quality Index (AQI) for Sullivan, Tennessee on 361 days. 296 of those days (82%) were in the Good range, and the median daily AQI was 40. That median is about the same as the typical monitored county in Tennessee (median 39 across 23 counties), and about the same as the typical monitored U.S. county (40). The main pollutant was fine particles (PM2.5) on 186 days. Across the years with fuller monitoring, the share of Good days rose: an average of 57% in 1980–1982 versus 79% 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 192 of 366 days1980: Moderate 116 of 366 days1980: Unhealthy for Sensitive Groups 40 of 366 days1980: Unhealthy 13 of 366 days1980: Very Unhealthy 5 of 366 days19801981: Good 227 of 364 days1981: Moderate 106 of 364 days1981: Unhealthy for Sensitive Groups 28 of 364 days1981: Unhealthy 3 of 364 days1982: Good 208 of 365 days1982: Moderate 113 of 365 days1982: Unhealthy for Sensitive Groups 33 of 365 days1982: Unhealthy 10 of 365 days1982: Very Unhealthy 1 of 365 days1983: Good 206 of 365 days1983: Moderate 85 of 365 days1983: Unhealthy for Sensitive Groups 49 of 365 days1983: Unhealthy 23 of 365 days1983: Very Unhealthy 2 of 365 days1984: Good 238 of 366 days1984: Moderate 89 of 366 days1984: Unhealthy for Sensitive Groups 33 of 366 days1984: Unhealthy 6 of 366 days1985: Good 237 of 365 days1985: Moderate 100 of 365 days1985: Unhealthy for Sensitive Groups 23 of 365 days1985: Unhealthy 5 of 365 days19851986: Good 220 of 338 days1986: Moderate 92 of 338 days1986: Unhealthy for Sensitive Groups 24 of 338 days1986: Unhealthy 2 of 338 days1987: Good 233 of 363 days1987: Moderate 98 of 363 days1987: Unhealthy for Sensitive Groups 29 of 363 days1987: Unhealthy 3 of 363 days1988: Good 214 of 287 days1988: Moderate 54 of 287 days1988: Unhealthy for Sensitive Groups 16 of 287 days1988: Unhealthy 2 of 287 days1988: Very Unhealthy 1 of 287 days1989: Good 241 of 365 days1989: Moderate 92 of 365 days1989: Unhealthy for Sensitive Groups 29 of 365 days1989: Unhealthy 3 of 365 days1990: Good 189 of 317 days1990: Moderate 83 of 317 days1990: Unhealthy for Sensitive Groups 33 of 317 days1990: Unhealthy 12 of 317 days19901991: Good 257 of 365 days1991: Moderate 96 of 365 days1991: Unhealthy for Sensitive Groups 12 of 365 days1992: Good 261 of 341 days1992: Moderate 69 of 341 days1992: Unhealthy for Sensitive Groups 8 of 341 days1992: Unhealthy 3 of 341 days1993: Good 237 of 362 days1993: Moderate 91 of 362 days1993: Unhealthy for Sensitive Groups 30 of 362 days1993: Unhealthy 4 of 362 days1994: Good 265 of 365 days1994: Moderate 82 of 365 days1994: Unhealthy for Sensitive Groups 15 of 365 days1994: Unhealthy 3 of 365 days1995: Good 227 of 365 days1995: Moderate 98 of 365 days1995: Unhealthy for Sensitive Groups 30 of 365 days1995: Unhealthy 10 of 365 days19951996: Good 250 of 362 days1996: Moderate 81 of 362 days1996: Unhealthy for Sensitive Groups 28 of 362 days1996: Unhealthy 3 of 362 days1997: Good 234 of 365 days1997: Moderate 97 of 365 days1997: Unhealthy for Sensitive Groups 30 of 365 days1997: Unhealthy 4 of 365 days1998: Good 217 of 365 days1998: Moderate 92 of 365 days1998: Unhealthy for Sensitive Groups 36 of 365 days1998: Unhealthy 20 of 365 days1999: Good 181 of 365 days1999: Moderate 135 of 365 days1999: Unhealthy for Sensitive Groups 42 of 365 days1999: Unhealthy 7 of 365 days2000: Good 195 of 366 days2000: Moderate 130 of 366 days2000: Unhealthy for Sensitive Groups 31 of 366 days2000: Unhealthy 8 of 366 days2000: Very Unhealthy 2 of 366 days20002001: Good 193 of 365 days2001: Moderate 135 of 365 days2001: Unhealthy for Sensitive Groups 32 of 365 days2001: Unhealthy 5 of 365 days2002: Good 189 of 365 days2002: Moderate 133 of 365 days2002: Unhealthy for Sensitive Groups 30 of 365 days2002: Unhealthy 13 of 365 days2003: Good 218 of 365 days2003: Moderate 128 of 365 days2003: Unhealthy for Sensitive Groups 16 of 365 days2003: Unhealthy 3 of 365 days2004: Good 234 of 366 days2004: Moderate 123 of 366 days2004: Unhealthy for Sensitive Groups 9 of 366 days2005: Good 192 of 365 days2005: Moderate 143 of 365 days2005: Unhealthy for Sensitive Groups 29 of 365 days2005: Unhealthy 1 of 365 days20052006: Good 203 of 365 days2006: Moderate 140 of 365 days2006: Unhealthy for Sensitive Groups 19 of 365 days2006: Unhealthy 3 of 365 days2007: Good 192 of 365 days2007: Moderate 134 of 365 days2007: Unhealthy for Sensitive Groups 34 of 365 days2007: Unhealthy 5 of 365 days2008: Good 278 of 366 days2008: Moderate 78 of 366 days2008: Unhealthy for Sensitive Groups 9 of 366 days2008: Unhealthy 1 of 366 days2009: Good 314 of 365 days2009: Moderate 50 of 365 days2009: Unhealthy for Sensitive Groups 1 of 365 days2010: Good 275 of 365 days2010: Moderate 84 of 365 days2010: Unhealthy for Sensitive Groups 6 of 365 days20102011: Good 292 of 365 days2011: Moderate 67 of 365 days2011: Unhealthy for Sensitive Groups 6 of 365 days2012: Good 295 of 366 days2012: Moderate 61 of 366 days2012: Unhealthy for Sensitive Groups 9 of 366 days2012: Unhealthy 1 of 366 days2013: Good 271 of 365 days2013: Moderate 93 of 365 days2013: Unhealthy for Sensitive Groups 1 of 365 days2014: Good 283 of 365 days2014: Moderate 82 of 365 days2015: Good 291 of 365 days2015: Moderate 74 of 365 days20152016: Good 249 of 322 days2016: Moderate 70 of 322 days2016: Unhealthy for Sensitive Groups 3 of 322 days2017: Good 218 of 326 days2017: Moderate 108 of 326 days2018: Good 259 of 364 days2018: Moderate 104 of 364 days2018: Unhealthy for Sensitive Groups 1 of 364 days2019: Good 240 of 362 days2019: Moderate 121 of 362 days2019: Unhealthy for Sensitive Groups 1 of 362 days2020: Good 314 of 366 days2020: Moderate 52 of 366 days20202021: Good 273 of 365 days2021: Moderate 92 of 365 days2022: Good 299 of 364 days2022: Moderate 65 of 364 days2023: Good 277 of 363 days2023: Moderate 84 of 363 days2023: Unhealthy for Sensitive Groups 2 of 363 days2024: Good 285 of 361 days2024: Moderate 76 of 361 days2025: Good 296 of 361 days2025: Moderate 65 of 361 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 1221981: 90th percentile AQI 971982: 90th percentile AQI 1051983: 90th percentile AQI 1361984: 90th percentile AQI 1011985: 90th percentile AQI 931986: 90th percentile AQI 1001987: 90th percentile AQI 971988: 90th percentile AQI 871989: 90th percentile AQI 931990: 90th percentile AQI 1191991: 90th percentile AQI 771992: 90th percentile AQI 741993: 90th percentile AQI 1001994: 90th percentile AQI 801995: 90th percentile AQI 1011996: 90th percentile AQI 971997: 90th percentile AQI 1001998: 90th percentile AQI 1291999: 90th percentile AQI 1082000: 90th percentile AQI 1052001: 90th percentile AQI 1012002: 90th percentile AQI 1062003: 90th percentile AQI 852004: 90th percentile AQI 742005: 90th percentile AQI 932006: 90th percentile AQI 902007: 90th percentile AQI 1052008: 90th percentile AQI 772009: 90th percentile AQI 582010: 90th percentile AQI 802011: 90th percentile AQI 712012: 90th percentile AQI 642013: 90th percentile AQI 582014: 90th percentile AQI 592015: 90th percentile AQI 582016: 90th percentile AQI 612017: 90th percentile AQI 612018: 90th percentile AQI 612019: 90th percentile AQI 592020: 90th percentile AQI 522021: 90th percentile AQI 592022: 90th percentile AQI 542023: 90th percentile AQI 622024: 90th percentile AQI 572025: 90th percentile AQI 551980: Median AQI 481981: Median AQI 451982: Median AQI 481983: Median AQI 461984: Median AQI 441985: Median AQI 441986: Median AQI 441987: Median AQI 441988: Median AQI 361989: Median AQI 441990: Median AQI 451991: Median AQI 421992: Median AQI 401993: Median AQI 421994: Median AQI 411995: Median AQI 441996: Median AQI 421997: Median AQI 441998: Median AQI 441999: Median AQI 512000: Median AQI 482001: Median AQI 502002: Median AQI 492003: Median AQI 462004: Median AQI 442005: Median AQI 482006: Median AQI 462007: Median AQI 492008: Median AQI 392009: Median AQI 342010: Median AQI 402011: Median AQI 392012: Median AQI 382013: Median AQI 412014: Median AQI 392015: Median AQI 392016: Median AQI 422017: Median AQI 452018: Median AQI 432019: Median AQI 442020: Median AQI 362021: Median AQI 412022: Median AQI 402023: Median AQI 422024: Median AQI 412025: Median AQI 401980198519901995200020052010201520202025
  • 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)18652%
Ozone17548%

Year-by-year data

Annual AQI summary by year
YearDays with AQIGoodModerateUnhealthy for Sensitive GroupsUnhealthyVery UnhealthyHazardousMedian AQI90th pct.Max AQIMain pollutant
2025361296650000405590PM2.5
2024361285760000415797Ozone
20233632778420004262118PM2.5
2022364299650000405487PM2.5
20213652739200004159100PM2.5
2020366314520000365280PM2.5
201936224012110004459119PM2.5
201836425910410004361105PM2.5
20173262181080000456193Ozone
20163222497030004261127Ozone
20153652917400003958100Ozone
2014365283820000395990Ozone
20133652719310004158101Ozone
20123662956191003864187Ozone
20113652926760003971126Ozone
20103652758460004080133Ozone
20093653145010003458108Ozone
20083662787891003977169Ozone
20073651921343450049105185Ozone
2006365203140193004690182Ozone
2005365192143291004893156Ozone
200436623412390004474133Ozone
2003365218128163004685182Ozone
200236518913330130049106190Ozone
20013651931353250050101190Ozone
20003661951303182048105210Ozone
19993651811354270051108172Ozone
19983652179236200044129197Ozone
1997365234973040044100169Ozone
199636225081283004297185Ozone
19953652279830100044101192Ozone
199436526582153004180166Ozone
1993362237913040042100182Ozone
19923412616983004074177NO2
199136525796120004277136Ozone
19903171898333120045119197Ozone
198936524192293004493177Ozone
198828721454162103687201Ozone
198736323398293004497164NO2
1986338220922420044100161Ozone
1985365237100235004493190Ozone
1984366238893360044101166Ozone
19833652068549232046136206Ozone
198236520811333101048105203Ozone
1981364227106283004597182Ozone
198036619211640135048122258Ozone

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 Tennessee with a similar median AQI in 2025

All monitored counties in Tennessee

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