# Median Air Quality Index (US EPA) in Lee County

Median Air Quality Index (US EPA) in Lee County was 40 in 2025. Source: U.S. Environmental Protection Agency.

- Indicator id: `aqi_median`
- Place id: `us-county-12071`
- Unit: index
- Definition: Median of the daily Air Quality Index (AQI) values of a US county over the days of the year with an AQI, from the EPA AirData annual summaries. The daily county AQI is the highest AQI among the monitors and pollutants reported that day (ozone, PM2.5, PM10, carbon monoxide and nitrogen dioxide). Lower is cleaner: 0 to 50 is good, 51 to 100 moderate and above 100 unhealthy for sensitive groups.
- Note: United States counties with air quality monitors only, about 1,000 of some 3,100 in recent years; a county without monitors has no value. The number of days with an AQI differs between counties because some monitors run only in the ozone season.
- Source: U.S. Environmental Protection Agency, EPA AirData annual AQI by county: median daily AQI (https://aqs.epa.gov/aqsweb/airdata/download_files.html#Annual)
- Publisher page: https://invokely.ai/en/publishers/environmental-protection-agency
- Retrieved: 2026-10-12
- License: Public domain (US government work, 17 U.S.C. 105); citation requested
- Citation: U.S. Environmental Protection Agency, Air Quality System, AirData. EPA AirData annual AQI by county: median daily AQI. https://aqs.epa.gov/aqsweb/airdata/download_files.html#Annual. Retrieved 2026-10-12.
- Web page: https://invokely.ai/en/median-air-quality-index/lee-county-florida
- API: https://invokely.ai/api/v1/series?indicator=aqi_median&place=us-county-12071

| Period | index |
|---|---:|
| 2025 | 40 |
| 2024 | 37 |
| 2023 | 35 |
| 2022 | 42 |
| 2021 | 41 |
| 2020 | 39 |
| 2019 | 40 |
| 2018 | 38 |
| 2017 | 40 |
| 2016 | 42 |
| 2015 | 40 |
| 2014 | 42 |
| 2013 | 40 |
| 2012 | 43 |
| 2011 | 44 |
| 2010 | 46 |
| 2009 | 43 |
| 2008 | 36 |
| 2007 | 39 |
| 2006 | 40 |
| 2005 | 39 |
| 2004 | 40 |
| 2003 | 37 |
| 2002 | 38 |
| 2001 | 37 |
| 2000 | 42 |
| 1999 | 42 |
| 1998 | 37 |
| 1997 | 38 |
| 1996 | 36 |
| 1995 | 36 |
| 1994 | 33 |
| 1993 | 34 |
| 1992 | 33 |
| 1991 | 34 |
| 1990 | 37 |
| 1989 | 33 |
| 1988 | 33 |
| 1983 | 29 |
| 1982 | 28 |
| 1981 | 27 |
| 1980 | 28 |