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

Median Air Quality Index (US EPA) in Essex County

Median Air Quality Index (US EPA) in Essex County was 44 in 2022, according to the U.S. Environmental Protection Agency. That is down 2 from 2021.

2022, index44
Change on 2021-2
Series high661987
Series low342008

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 Essex County, 1980 to 2022

304050607019801987199420012008201520221980: 55 index1981: 56 index1982: 56 index1983: 57 index1984: 46 index1985: 51 index1986: 50 index1987: 66 index1988: 60 index1989: 50 index1990: 52 index1991: 53 index1992: 52 index1993: 51 index1994: 54 index1995: 49 index1996: 50 index1997: 48 index1998: 50 index1999: 54 index2000: 47 index2001: 46 index2002: 50 index2003: 46 index2004: 42 index2005: 42 index2006: 41 index2007: 37 index2008: 34 index2009: 38 index2010: 45 index2011: 49 index2012: 50 index2013: 43 index2014: 43 index2015: 39 index2016: 46 index2017: 44 index2018: 43 index2019: 47 index2020: 44 index2021: 46 index2022: 44 index304050607019801995201020221980: 55 index1981: 56 index1982: 56 index1983: 57 index1984: 46 index1985: 51 index1986: 50 index1987: 66 index1988: 60 index1989: 50 index1990: 52 index1991: 53 index1992: 52 index1993: 51 index1994: 54 index1995: 49 index1996: 50 index1997: 48 index1998: 50 index1999: 54 index2000: 47 index2001: 46 index2002: 50 index2003: 46 index2004: 42 index2005: 42 index2006: 41 index2007: 37 index2008: 34 index2009: 38 index2010: 45 index2011: 49 index2012: 50 index2013: 43 index2014: 43 index2015: 39 index2016: 46 index2017: 44 index2018: 43 index2019: 47 index2020: 44 index2021: 46 index2022: 44 index
index. Source: EPA, EPA AirData annual AQI by county: median daily AQI. Retrieved 2026-10-12, published 2026-07-13.
All 43 values
Periodindex
202244
202146
202044
201947
201843
201744
201646
201539
201443
201343
201250
201149
201045
200938
200834
200737
200641
200542
200442
200346
200250
200146
200047
199954
199850
199748
199650
199549
199454
199351
199252
199153
199052
198950
198860
198766
198650
198551
198446
198357
198256
198156
198055

Essex County compared with nearby places

Atlantic County: 36 indexBergen County: 42 indexCamden County: 48 indexCumberland County: 38 indexEssex County: 44 indexGloucester County: 42 indexHudson County: 44 indexHunterdon County: 42 indexMercer County: 46 indexMiddlesex County: 42 indexMonmouth County: 38 indexMorris County: 36 indexOcean County: 40 indexPassaic County: 38 indexUnion County: 49 indexWarren County: 43 index
  • Under 38
  • 38 to 42
  • 42 to 44
  • 44 and over
  • No data
Median Air Quality Index (US EPA), 2022, index. Essex 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), Essex County, 1980 to 2022) [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), Essex County, 1980 to 2022. 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/essex-county-new-jersey. 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), Essex County, 1980 to 2022. 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/essex-county-new-jersey.

Harvard

U.S. Environmental Protection Agency (2026) EPA AirData annual AQI by county: median daily AQI, Median Air Quality Index (US EPA), Essex County, 1980 to 2022 [Dataset]. Available at: https://aqs.epa.gov/aqsweb/airdata/download_files.html#Annual, via Invokely: https://invokely.ai/en/median-air-quality-index/essex-county-new-jersey (Accessed: 12 October 2026).

BibTeX
@misc{environmental_median_air_quality_index_2022,
  author = {{U.S. Environmental Protection Agency}},
  title = {{EPA AirData annual AQI by county: median daily AQI: Median Air Quality Index (US EPA), Essex County, 1980 to 2022}},
  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/essex-county-new-jersey. 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), Essex County, 1980 to 2022
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/essex-county-new-jersey
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/en/median-air-quality-index/essex-county-new-jersey.
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 Essex County?

Median Air Quality Index (US EPA) in Essex County was 44 in 2022, according to the U.S. Environmental Protection Agency. That is down 2 from 2021.

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 Essex County?

66 in 1987, the highest value since 1980 in this series.

Related statistics for Essex County

All statistics for Essex County | Essex County in figures