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

Median Air Quality Index (US EPA) in Kent County

Median Air Quality Index (US EPA) in Kent County was 31 in 2025, according to the U.S. Environmental Protection Agency. That is unchanged from 2024.

2025, index31
Change on 20240
Series high481985
Series low312022

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 Kent County, 1980 to 2025

303540455019801987199420012008201520251980: 44 index1981: 38 index1982: 36 index1983: 33 index1984: 42 index1985: 48 index1986: 45 index1987: 46 index1988: 45 index1989: 47 index1990: 43 index1991: 44 index1992: 38 index1993: 40 index1994: 39 index1995: 39 index1996: 38 index1997: 40 index1998: 40 index1999: 39 index2000: 42 index2001: 46 index2002: 42 index2003: 40 index2004: 39 index2005: 43 index2006: 38 index2007: 40 index2008: 39 index2009: 35 index2010: 38 index2011: 43 index2012: 39 index2013: 40 index2014: 37 index2015: 40 index2016: 35 index2017: 32 index2018: 36 index2019: 34 index2020: 34 index2021: 34 index2022: 31 index2023: 40 index2024: 31 index2025: 31 index303540455019801996201220251980: 44 index1981: 38 index1982: 36 index1983: 33 index1984: 42 index1985: 48 index1986: 45 index1987: 46 index1988: 45 index1989: 47 index1990: 43 index1991: 44 index1992: 38 index1993: 40 index1994: 39 index1995: 39 index1996: 38 index1997: 40 index1998: 40 index1999: 39 index2000: 42 index2001: 46 index2002: 42 index2003: 40 index2004: 39 index2005: 43 index2006: 38 index2007: 40 index2008: 39 index2009: 35 index2010: 38 index2011: 43 index2012: 39 index2013: 40 index2014: 37 index2015: 40 index2016: 35 index2017: 32 index2018: 36 index2019: 34 index2020: 34 index2021: 34 index2022: 31 index2023: 40 index2024: 31 index2025: 31 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
202531
202431
202340
202231
202134
202034
201934
201836
201732
201635
201540
201437
201340
201239
201143
201038
200935
200839
200740
200638
200543
200439
200340
200242
200146
200042
199939
199840
199740
199638
199539
199439
199340
199238
199144
199043
198947
198845
198746
198645
198548
198442
198333
198236
198138
198044

Kent County compared with nearby places

Kent County: 31 indexProvidence County: 39 indexWashington County: 37 index
  • Under 35
  • 35 to 38
  • 38 and over
  • No data
Median Air Quality Index (US EPA), 2025, index. Kent 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.

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), Kent 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), Kent 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/kent-county-rhode-island. 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), Kent 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/kent-county-rhode-island.

Harvard

U.S. Environmental Protection Agency (2026) EPA AirData annual AQI by county: median daily AQI, Median Air Quality Index (US EPA), Kent 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/kent-county-rhode-island (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), Kent 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/kent-county-rhode-island. 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), Kent 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/kent-county-rhode-island
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/en/median-air-quality-index/kent-county-rhode-island.
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 Kent County?

Median Air Quality Index (US EPA) in Kent County was 31 in 2025, according to the U.S. Environmental Protection Agency. That is unchanged 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 Kent County?

48 in 1985, the highest value since 1980 in this series.

Related statistics for Kent County

All statistics for Kent County | Kent County in figures