EnviroNearby

Greene County, Indiana air quality history

Daily Air Quality Index summaries from EPA monitors in Greene, Indiana, 2000–2025.

72%
Good days in 2025
42
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 Greene, Indiana on 365 days. 263 of those days (72%) were in the Good range, and the median daily AQI was 42. That median is about the same as the typical monitored county in Indiana (median 41 across 33 counties), and about the same as the typical monitored U.S. county (40). The main pollutant was ozone on 208 days. Across the years with fuller monitoring, the share of Good days rose: an average of 50% in 2000–2002 versus 70% 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%2000: Good 101 of 174 days2000: Moderate 59 of 174 days2000: Unhealthy for Sensitive Groups 10 of 174 days2000: Unhealthy 4 of 174 days20002001: Good 83 of 178 days2001: Moderate 62 of 178 days2001: Unhealthy for Sensitive Groups 30 of 178 days2001: Unhealthy 3 of 178 days2002: Good 81 of 183 days2002: Moderate 65 of 183 days2002: Unhealthy for Sensitive Groups 24 of 183 days2002: Unhealthy 13 of 183 days20022003: Good 93 of 183 days2003: Moderate 63 of 183 days2003: Unhealthy for Sensitive Groups 23 of 183 days2003: Unhealthy 4 of 183 days2004: Good 122 of 183 days2004: Moderate 56 of 183 days2004: Unhealthy for Sensitive Groups 5 of 183 days20042005: Good 90 of 183 days2005: Moderate 70 of 183 days2005: Unhealthy for Sensitive Groups 23 of 183 days2006: Good 103 of 183 days2006: Moderate 70 of 183 days2006: Unhealthy for Sensitive Groups 10 of 183 days20062007: Good 80 of 183 days2007: Moderate 74 of 183 days2007: Unhealthy for Sensitive Groups 27 of 183 days2007: Unhealthy 2 of 183 days2008: Good 113 of 181 days2008: Moderate 62 of 181 days2008: Unhealthy for Sensitive Groups 6 of 181 days20082009: Good 123 of 165 days2009: Moderate 41 of 165 days2009: Unhealthy for Sensitive Groups 1 of 165 days2010: Good 104 of 166 days2010: Moderate 56 of 166 days2010: Unhealthy for Sensitive Groups 6 of 166 days20102011: Good 96 of 153 days2011: Moderate 48 of 153 days2011: Unhealthy for Sensitive Groups 8 of 153 days2011: Unhealthy 1 of 153 days2012: Good 109 of 241 days2012: Moderate 113 of 241 days2012: Unhealthy for Sensitive Groups 18 of 241 days2012: Unhealthy 1 of 241 days20122013: Good 152 of 242 days2013: Moderate 89 of 242 days2013: Unhealthy for Sensitive Groups 1 of 242 days2014: Good 166 of 244 days2014: Moderate 78 of 244 days20142015: Good 168 of 243 days2015: Moderate 73 of 243 days2015: Unhealthy for Sensitive Groups 2 of 243 days2016: Good 161 of 244 days2016: Moderate 80 of 244 days2016: Unhealthy for Sensitive Groups 3 of 244 days20162017: Good 213 of 282 days2017: Moderate 68 of 282 days2017: Unhealthy for Sensitive Groups 1 of 282 days2018: Good 294 of 361 days2018: Moderate 64 of 361 days2018: Unhealthy for Sensitive Groups 3 of 361 days20182019: Good 291 of 355 days2019: Moderate 64 of 355 days2020: Good 312 of 361 days2020: Moderate 49 of 361 days20202021: Good 288 of 356 days2021: Moderate 68 of 356 days2022: Good 298 of 351 days2022: Moderate 51 of 351 days2022: Unhealthy for Sensitive Groups 2 of 351 days20222023: Good 234 of 365 days2023: Moderate 120 of 365 days2023: Unhealthy for Sensitive Groups 9 of 365 days2023: Unhealthy 1 of 365 days2023: Very Unhealthy 1 of 365 days2024: Good 266 of 362 days2024: Moderate 96 of 362 days20242025: Good 263 of 365 days2025: Moderate 102 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 year0501001502000: 90th percentile AQI 932001: 90th percentile AQI 1222002: 90th percentile AQI 1292003: 90th percentile AQI 1082004: 90th percentile AQI 842005: 90th percentile AQI 1082006: 90th percentile AQI 872007: 90th percentile AQI 1152008: 90th percentile AQI 842009: 90th percentile AQI 712010: 90th percentile AQI 842011: 90th percentile AQI 842012: 90th percentile AQI 1002013: 90th percentile AQI 672014: 90th percentile AQI 642015: 90th percentile AQI 642016: 90th percentile AQI 642017: 90th percentile AQI 592018: 90th percentile AQI 592019: 90th percentile AQI 552020: 90th percentile AQI 542021: 90th percentile AQI 572022: 90th percentile AQI 552023: 90th percentile AQI 652024: 90th percentile AQI 572025: 90th percentile AQI 592000: Median AQI 482001: Median AQI 542002: Median AQI 542003: Median AQI 492004: Median AQI 462005: Median AQI 512006: Median AQI 492007: Median AQI 542008: Median AQI 472009: Median AQI 442010: Median AQI 472011: Median AQI 482012: Median AQI 522013: Median AQI 462014: Median AQI 452015: Median AQI 442016: Median AQI 422017: Median AQI 432018: Median AQI 382019: Median AQI 402020: Median AQI 362021: Median AQI 382022: Median AQI 382023: Median AQI 442024: Median AQI 422025: Median AQI 4220002002200420062008201020122014201620182020202220242025
  • 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
Ozone20857%
Fine particles (PM2.5)15743%

Year-by-year data

Annual AQI summary by year
YearDays with AQIGoodModerateUnhealthy for Sensitive GroupsUnhealthyVery UnhealthyHazardousMedian AQI90th pct.Max AQIMain pollutant
20253652631020000425990Ozone
2024362266960000425797Ozone
202336523412091104465217Ozone
20223512985120003855101Ozone
20213562886800003857100Ozone
2020361312490000365490Ozone
2019355291640000405587Ozone
20183612946430003859129Ozone
20172822136810004359101Ozone
20162441618030004264140Ozone
20152431687320004464115Ozone
2014244166780000456488Ozone
20132421528910004667122Ozone
20122411091131810052100151Ozone
2011153964881004884159Ozone
20101661045660004784119Ozone
20091651234110004471101Ozone
20081811136260004784115Ozone
200718380742720054115161Ozone
200618310370100004987136Ozone
200518390702300051108147Ozone
20041831225650004684119Ozone
200318393632340049108179Ozone
2002183816524130054129179Ozone
200117883623030054122166Ozone
200017410159104004893174Ozone

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 2000–2025 (EPA download page). EPA file dates: 2026-06-26. Imported into EnviroNearby November 5, 2026. How we use this data · Report a problem