Data / Median Air Quality Index (US EPA) / Davidson County

Median Air Quality Index (US EPA) in Davidson County

Median Air Quality Index (US EPA) in Davidson County was 49 in 2025, according to the U.S. Environmental Protection Agency. That is down 1 from 2024.

2025, index49
Change on 2024-1
Series high681983
Series low381992

Next release: Tuesday, 13 July 2027, estimated by Invokely from past publication dates (low confidence), not announced by the publisher. Release calendar

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Median Air Quality Index (US EPA) in Davidson County, 1980 to 2025

304050607019801987199420012008201520251980: 54 index1981: 62 index1982: 62 index1983: 68 index1984: 63 index1985: 51 index1986: 54 index1987: 53 index1988: 50 index1989: 46 index1990: 43 index1991: 39 index1992: 38 index1993: 39 index1994: 46 index1995: 44 index1996: 42 index1997: 42 index1998: 42 index1999: 64 index2000: 65 index2001: 63 index2002: 60 index2003: 61 index2004: 58 index2005: 62 index2006: 61 index2007: 61 index2008: 57 index2009: 54 index2010: 56 index2011: 54 index2012: 54 index2013: 53 index2014: 54 index2015: 53 index2016: 53 index2017: 53 index2018: 52 index2019: 52 index2020: 50 index2021: 52 index2022: 51 index2023: 53 index2024: 50 index2025: 49 index304050607019801996201220251980: 54 index1981: 62 index1982: 62 index1983: 68 index1984: 63 index1985: 51 index1986: 54 index1987: 53 index1988: 50 index1989: 46 index1990: 43 index1991: 39 index1992: 38 index1993: 39 index1994: 46 index1995: 44 index1996: 42 index1997: 42 index1998: 42 index1999: 64 index2000: 65 index2001: 63 index2002: 60 index2003: 61 index2004: 58 index2005: 62 index2006: 61 index2007: 61 index2008: 57 index2009: 54 index2010: 56 index2011: 54 index2012: 54 index2013: 53 index2014: 54 index2015: 53 index2016: 53 index2017: 53 index2018: 52 index2019: 52 index2020: 50 index2021: 52 index2022: 51 index2023: 53 index2024: 50 index2025: 49 index
index. Source: EPA, EPA AirData annual AQI by county: median daily AQI. Retrieved 2026-10-12, published 2026-07-13.
All 46 values
Periodindex
202549
202450
202353
202251
202152
202050
201952
201852
201753
201653
201553
201454
201353
201254
201154
201056
200954
200857
200761
200661
200562
200458
200361
200260
200163
200065
199964
199842
199742
199642
199544
199446
199339
199238
199139
199043
198946
198850
198753
198654
198551
198463
198368
198262
198162
198054

Davidson County compared with nearby places

Anderson County: 39 indexBlount County: 44 indexClaiborne County: 35 indexDavidson County: 49 indexDeKalb County: 34 indexDyer County: 34 indexHamilton County: 44 indexJefferson County: 41 indexKnox County: 46 indexLawrence County: 33 indexLoudon County: 39 indexMcMinn County: 37 indexMadison County: 36 indexMaury County: 33 indexMontgomery County: 32 indexPutnam County: 30 indexRoane County: 29 indexSevier County: 40 indexShelby County: 47 indexSullivan County: 40 indexSumner County: 44 indexWilliamson County: 40 indexWilson County: 38 index
  • Under 33
  • 33 to 37
  • 37 to 40
  • 40 to 44
  • 44 and over
  • No data
Median Air Quality Index (US EPA), 2025, index. Davidson County is outlined. Same source and period for every area shown. Source: U.S. Environmental Protection Agency. Boundaries: U.S. Census Bureau cartographic boundary files.

Rankings

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.

More on how it is measured
  • 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.

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.

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How to cite

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.

Citation styles

The publisher is the author. Invokely is named only as the place the figures were read, where a style asks for it.

APA 7

U.S. Environmental Protection Agency. (2026). EPA AirData annual AQI by county: median daily AQI (Median Air Quality Index (US EPA), Davidson County, 1980 to 2025) [Data set]. Retrieved October 12, 2026, from https://aqs.epa.gov/aqsweb/airdata/download_files.html#Annual

MLA 9

EPA AirData annual AQI by county: median daily AQI, Median Air Quality Index (US EPA), Davidson County, 1980 to 2025. U.S. Environmental Protection Agency, 13 July 2026, https://aqs.epa.gov/aqsweb/airdata/download_files.html#Annual. Invokely, https://invokely.ai/en/median-air-quality-index/davidson-county-tennessee. Accessed 12 Oct. 2026.

Chicago (author-date)

U.S. Environmental Protection Agency. 2026. EPA AirData annual AQI by county: median daily AQI. Median Air Quality Index (US EPA), Davidson County, 1980 to 2025. Dataset. Accessed October 12, 2026. https://aqs.epa.gov/aqsweb/airdata/download_files.html#Annual. Also distributed by Invokely, https://invokely.ai/en/median-air-quality-index/davidson-county-tennessee.

Harvard

U.S. Environmental Protection Agency (2026) EPA AirData annual AQI by county: median daily AQI, Median Air Quality Index (US EPA), Davidson County, 1980 to 2025 [Dataset]. Available at: https://aqs.epa.gov/aqsweb/airdata/download_files.html#Annual, via Invokely: https://invokely.ai/en/median-air-quality-index/davidson-county-tennessee (Accessed: 12 October 2026).

BibTeX
@misc{environmental_median_air_quality_index_2025,
  author = {{U.S. Environmental Protection Agency}},
  title = {{EPA AirData annual AQI by county: median daily AQI: Median Air Quality Index (US EPA), Davidson County, 1980 to 2025}},
  year = {2026},
  howpublished = {Data set},
  url = {https://aqs.epa.gov/aqsweb/airdata/download_files.html#Annual},
  urldate = {2026-10-12},
  note = {Accessed via Invokely, https://invokely.ai/en/median-air-quality-index/davidson-county-tennessee. Publisher attribution: 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.},
}
RIS
TY  - DATA
AU  - U.S. Environmental Protection Agency
TI  - EPA AirData annual AQI by county: median daily AQI: Median Air Quality Index (US EPA), Davidson County, 1980 to 2025
PY  - 2026
DA  - 2026/07/13
PB  - U.S. Environmental Protection Agency
DB  - Invokely
UR  - https://aqs.epa.gov/aqsweb/airdata/download_files.html#Annual
L2  - https://invokely.ai/en/median-air-quality-index/davidson-county-tennessee
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/en/median-air-quality-index/davidson-county-tennessee.
N1  - Publisher attribution: 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.
ER  -
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Questions

What is the median Air Quality Index (US EPA) in Davidson County?

Median Air Quality Index (US EPA) in Davidson County was 49 in 2025, according to the U.S. Environmental Protection Agency. That is down 1 from 2024.

Where does this figure come from?

U.S. Environmental Protection Agency. EPA AirData annual AQI by county: median daily AQI. Retrieved by Invokely on 2026-10-12.

What was the highest median Air Quality Index (US EPA) in Davidson County?

68 in 1983, the highest value since 1980 in this series.

Related statistics for Davidson County

All statistics for Davidson County | Davidson County in figures