EnviroNearby

Vanderburgh County, Indiana air quality history

Daily Air Quality Index summaries from EPA monitors in Vanderburgh, Indiana, 1980–2025.

59%
Good days in 2025
47
Median daily AQI, 2025
0
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 Vanderburgh, Indiana on 365 days. 217 of those days (59%) were in the Good range, and the median daily AQI was 47. That median is higher than the typical monitored county in Indiana (median 41 across 33 counties), and higher than the typical monitored U.S. county (40). The main pollutant was fine particles (PM2.5) on 229 days. Across the years with fuller monitoring, the share of Good days fell: an average of 75% in 1980–1982 versus 54% 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 270 of 273 days1980: Moderate 3 of 273 days19801981: Good 232 of 360 days1981: Moderate 97 of 360 days1981: Unhealthy for Sensitive Groups 26 of 360 days1981: Unhealthy 5 of 360 days1982: Good 221 of 350 days1982: Moderate 79 of 350 days1982: Unhealthy for Sensitive Groups 34 of 350 days1982: Unhealthy 16 of 350 days1983: Good 239 of 365 days1983: Moderate 63 of 365 days1983: Unhealthy for Sensitive Groups 45 of 365 days1983: Unhealthy 13 of 365 days1983: Very Unhealthy 5 of 365 days1984: Good 268 of 366 days1984: Moderate 72 of 366 days1984: Unhealthy for Sensitive Groups 23 of 366 days1984: Unhealthy 3 of 366 days1985: Good 259 of 365 days1985: Moderate 68 of 365 days1985: Unhealthy for Sensitive Groups 33 of 365 days1985: Unhealthy 5 of 365 days19851986: Good 268 of 365 days1986: Moderate 70 of 365 days1986: Unhealthy for Sensitive Groups 20 of 365 days1986: Unhealthy 3 of 365 days1986: Very Unhealthy 4 of 365 days1987: Good 226 of 365 days1987: Moderate 68 of 365 days1987: Unhealthy for Sensitive Groups 49 of 365 days1987: Unhealthy 22 of 365 days1988: Good 233 of 351 days1988: Moderate 57 of 351 days1988: Unhealthy for Sensitive Groups 30 of 351 days1988: Unhealthy 28 of 351 days1988: Very Unhealthy 3 of 351 days1989: Good 250 of 363 days1989: Moderate 77 of 363 days1989: Unhealthy for Sensitive Groups 28 of 363 days1989: Unhealthy 6 of 363 days1989: Very Unhealthy 2 of 363 days1990: Good 254 of 342 days1990: Moderate 62 of 342 days1990: Unhealthy for Sensitive Groups 19 of 342 days1990: Unhealthy 6 of 342 days1990: Very Unhealthy 1 of 342 days19901991: Good 251 of 347 days1991: Moderate 62 of 347 days1991: Unhealthy for Sensitive Groups 23 of 347 days1991: Unhealthy 11 of 347 days1992: Good 286 of 364 days1992: Moderate 60 of 364 days1992: Unhealthy for Sensitive Groups 17 of 364 days1992: Unhealthy 1 of 364 days1993: Good 247 of 348 days1993: Moderate 71 of 348 days1993: Unhealthy for Sensitive Groups 23 of 348 days1993: Unhealthy 7 of 348 days1994: Good 232 of 364 days1994: Moderate 74 of 364 days1994: Unhealthy for Sensitive Groups 43 of 364 days1994: Unhealthy 15 of 364 days1995: Good 210 of 340 days1995: Moderate 74 of 340 days1995: Unhealthy for Sensitive Groups 36 of 340 days1995: Unhealthy 20 of 340 days19951996: Good 246 of 365 days1996: Moderate 67 of 365 days1996: Unhealthy for Sensitive Groups 40 of 365 days1996: Unhealthy 12 of 365 days1997: Good 257 of 364 days1997: Moderate 72 of 364 days1997: Unhealthy for Sensitive Groups 27 of 364 days1997: Unhealthy 8 of 364 days1998: Good 240 of 361 days1998: Moderate 76 of 361 days1998: Unhealthy for Sensitive Groups 35 of 361 days1998: Unhealthy 9 of 361 days1998: Very Unhealthy 1 of 361 days1999: Good 220 of 365 days1999: Moderate 97 of 365 days1999: Unhealthy for Sensitive Groups 33 of 365 days1999: Unhealthy 15 of 365 days2000: Good 203 of 366 days2000: Moderate 139 of 366 days2000: Unhealthy for Sensitive Groups 24 of 366 days20002001: Good 222 of 365 days2001: Moderate 132 of 365 days2001: Unhealthy for Sensitive Groups 11 of 365 days2002: Good 149 of 365 days2002: Moderate 172 of 365 days2002: Unhealthy for Sensitive Groups 28 of 365 days2002: Unhealthy 16 of 365 days2003: Good 143 of 365 days2003: Moderate 197 of 365 days2003: Unhealthy for Sensitive Groups 22 of 365 days2003: Unhealthy 3 of 365 days2004: Good 155 of 366 days2004: Moderate 206 of 366 days2004: Unhealthy for Sensitive Groups 5 of 366 days2005: Good 60 of 365 days2005: Moderate 265 of 365 days2005: Unhealthy for Sensitive Groups 39 of 365 days2005: Unhealthy 1 of 365 days20052006: Good 86 of 365 days2006: Moderate 255 of 365 days2006: Unhealthy for Sensitive Groups 21 of 365 days2006: Unhealthy 3 of 365 days2007: Good 80 of 365 days2007: Moderate 240 of 365 days2007: Unhealthy for Sensitive Groups 37 of 365 days2007: Unhealthy 8 of 365 days2008: Good 89 of 363 days2008: Moderate 264 of 363 days2008: Unhealthy for Sensitive Groups 10 of 363 days2009: Good 149 of 356 days2009: Moderate 206 of 356 days2009: Unhealthy for Sensitive Groups 1 of 356 days2010: Good 76 of 365 days2010: Moderate 281 of 365 days2010: Unhealthy for Sensitive Groups 8 of 365 days20102011: Good 162 of 365 days2011: Moderate 192 of 365 days2011: Unhealthy for Sensitive Groups 11 of 365 days2012: Good 102 of 366 days2012: Moderate 242 of 366 days2012: Unhealthy for Sensitive Groups 20 of 366 days2012: Unhealthy 2 of 366 days2013: Good 126 of 365 days2013: Moderate 236 of 365 days2013: Unhealthy for Sensitive Groups 3 of 365 days2014: Good 116 of 365 days2014: Moderate 245 of 365 days2014: Unhealthy for Sensitive Groups 4 of 365 days2015: Good 142 of 365 days2015: Moderate 217 of 365 days2015: Unhealthy for Sensitive Groups 6 of 365 days20152016: Good 202 of 364 days2016: Moderate 158 of 364 days2016: Unhealthy for Sensitive Groups 4 of 364 days2017: Good 205 of 365 days2017: Moderate 158 of 365 days2017: Unhealthy for Sensitive Groups 2 of 365 days2018: Good 200 of 365 days2018: Moderate 162 of 365 days2018: Unhealthy for Sensitive Groups 3 of 365 days2019: Good 229 of 365 days2019: Moderate 136 of 365 days2020: Good 248 of 366 days2020: Moderate 116 of 366 days2020: Unhealthy for Sensitive Groups 2 of 366 days20202021: Good 176 of 365 days2021: Moderate 188 of 365 days2021: Unhealthy for Sensitive Groups 1 of 365 days2022: Good 172 of 365 days2022: Moderate 193 of 365 days2023: Good 152 of 365 days2023: Moderate 205 of 365 days2023: Unhealthy for Sensitive Groups 7 of 365 days2023: Unhealthy 1 of 365 days2024: Good 227 of 366 days2024: Moderate 137 of 366 days2024: Unhealthy for Sensitive Groups 2 of 366 days2025: Good 217 of 365 days2025: Moderate 148 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 391981: 90th percentile AQI 931982: 90th percentile AQI 1121983: 90th percentile AQI 1291984: 90th percentile AQI 901985: 90th percentile AQI 1011986: 90th percentile AQI 931987: 90th percentile AQI 1331988: 90th percentile AQI 1431989: 90th percentile AQI 1001990: 90th percentile AQI 931991: 90th percentile AQI 1001992: 90th percentile AQI 741993: 90th percentile AQI 931994: 90th percentile AQI 1191995: 90th percentile AQI 1221996: 90th percentile AQI 1081997: 90th percentile AQI 1001998: 90th percentile AQI 1121999: 90th percentile AQI 1122000: 90th percentile AQI 872001: 90th percentile AQI 832002: 90th percentile AQI 1082003: 90th percentile AQI 932004: 90th percentile AQI 802005: 90th percentile AQI 1012006: 90th percentile AQI 902007: 90th percentile AQI 1082008: 90th percentile AQI 772009: 90th percentile AQI 712010: 90th percentile AQI 802011: 90th percentile AQI 792012: 90th percentile AQI 872013: 90th percentile AQI 712014: 90th percentile AQI 772015: 90th percentile AQI 712016: 90th percentile AQI 672017: 90th percentile AQI 622018: 90th percentile AQI 642019: 90th percentile AQI 592020: 90th percentile AQI 612021: 90th percentile AQI 682022: 90th percentile AQI 662023: 90th percentile AQI 702024: 90th percentile AQI 612025: 90th percentile AQI 631980: Median AQI 251981: Median AQI 431982: Median AQI 431983: Median AQI 411984: Median AQI 401985: Median AQI 381986: Median AQI 341987: Median AQI 371988: Median AQI 351989: Median AQI 371990: Median AQI 361991: Median AQI 351992: Median AQI 351993: Median AQI 391994: Median AQI 411995: Median AQI 411996: Median AQI 341997: Median AQI 361998: Median AQI 351999: Median AQI 422000: Median AQI 462001: Median AQI 422002: Median AQI 542003: Median AQI 552004: Median AQI 552005: Median AQI 612006: Median AQI 592007: Median AQI 602008: Median AQI 562009: Median AQI 532010: Median AQI 612011: Median AQI 532012: Median AQI 572013: Median AQI 552014: Median AQI 562015: Median AQI 532016: Median AQI 472017: Median AQI 472018: Median AQI 482019: Median AQI 462020: Median AQI 432021: Median AQI 512022: Median AQI 512023: Median AQI 522024: Median AQI 462025: 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)22963%
Ozone13537%
Coarse particles (PM10)1<1%

Year-by-year data

Annual AQI summary by year
YearDays with AQIGoodModerateUnhealthy for Sensitive GroupsUnhealthyVery UnhealthyHazardousMedian AQI90th pct.Max AQIMain pollutant
202536521714800004763100PM2.5
202436622713720004661119PM2.5
202336515220571005270179PM2.5
202236517219300005166100PM2.5
202136517618810005168109PM2.5
202036624811620004361101PM2.5
20193652291360000465990PM2.5
201836520016230004864143PM2.5
201736520515820004762115PM2.5
201636420215840004767140PM2.5
201536514221760005371133PM2.5
201436511624540005677108PM2.5
201336512623630005571108PM2.5
2012366102242202005787161PM2.5
2011365162192110005379150PM2.5
20103657628180006180122PM2.5
200935614920610005371119PM2.5
200836389264100005677143PM2.5
2007365802403780060108164PM2.5
200636586255213005990174PM2.5
2005365602653910061101161PM2.5
200436615520650005580126PM2.5
2003365143197223005593159PM2.5
200236514917228160054108200PM2.5
2001365222132110004283135Ozone
2000366203139240004687150Ozone
19993652209733150042112190Ozone
1998361240763591035112206Ozone
1997364257722780036100200Ozone
19963652466740120034108195Ozone
19953402107436200041122190Ozone
19943642327443150041119195Ozone
199334824771237003993195Ozone
199236428660171003574182Ozone
19913472516223110035100200Ozone
199034225462196103693201Ozone
1989363250772862037100221Ozone
19883512335730283035143205Ozone
19873652266849220037133200Ozone
198636526870203403493212Ozone
1985365259683350038101200Ozone
198436626872233004090187Ozone
19833652396345135041129215Ozone
19823502217934160043112187Ozone
198136023297265004393182NO2
198027327030000253957NO2

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 Indiana with a similar median AQI in 2025

All monitored counties in Indiana

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