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

Median Air Quality Index (US EPA) in Lawrence County

Median Air Quality Index (US EPA) in Lawrence County was 24 in 2024, according to the U.S. Environmental Protection Agency. That is down 10 from 2023.

2024, index24
Change on 2023-10
Series high501981
Series low242024

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 Lawrence County, 1980 to 2024

2030405019801987199420012008201520241980: 43 index1981: 50 index1982: 39 index1983: 37 index1984: 38 index1985: 40 index1986: 40 index1987: 40 index1988: 41 index1989: 36 index1990: 36 index1991: 37 index1992: 36 index1993: 38 index1994: 40 index1995: 38 index1996: 40 index1997: 39 index1998: 36 index1999: 39 index2000: 37 index2001: 35 index2002: 35 index2003: 35 index2004: 33 index2005: 39 index2006: 35 index2007: 35 index2008: 35 index2009: 29 index2010: 33 index2011: 33 index2012: 34 index2013: 34 index2014: 35 index2015: 33 index2016: 33 index2017: 34 index2018: 32 index2019: 31 index2020: 31 index2021: 31 index2022: 37 index2023: 34 index2024: 24 index2030405019801995201020241980: 43 index1981: 50 index1982: 39 index1983: 37 index1984: 38 index1985: 40 index1986: 40 index1987: 40 index1988: 41 index1989: 36 index1990: 36 index1991: 37 index1992: 36 index1993: 38 index1994: 40 index1995: 38 index1996: 40 index1997: 39 index1998: 36 index1999: 39 index2000: 37 index2001: 35 index2002: 35 index2003: 35 index2004: 33 index2005: 39 index2006: 35 index2007: 35 index2008: 35 index2009: 29 index2010: 33 index2011: 33 index2012: 34 index2013: 34 index2014: 35 index2015: 33 index2016: 33 index2017: 34 index2018: 32 index2019: 31 index2020: 31 index2021: 31 index2022: 37 index2023: 34 index2024: 24 index
index. Source: EPA, EPA AirData annual AQI by county: median daily AQI. Retrieved 2026-10-12, published 2026-07-13.
All 45 values
Periodindex
202424
202334
202237
202131
202031
201931
201832
201734
201633
201533
201435
201334
201234
201133
201033
200929
200835
200735
200635
200539
200433
200335
200235
200135
200037
199939
199836
199739
199640
199538
199440
199338
199236
199137
199036
198936
198841
198740
198640
198540
198438
198337
198239
198150
198043

Lawrence County compared with nearby places

Adams County: 44 indexAllegheny County: 52 indexArmstrong County: 41 indexBeaver County: 46 indexBerks County: 43 indexBlair County: 37 indexBradford County: 37 indexBucks County: 36 indexCambria County: 42 indexCentre County: 40 indexChester County: 41 indexCumberland County: 36 indexDauphin County: 48 indexDelaware County: 43 indexElk County: 34 indexErie County: 38 indexFayette County: 42 indexFranklin County: 35 indexGreene County: 38 indexIndiana County: 37 indexLackawanna County: 40 indexLancaster County: 50 indexLawrence County: 24 indexLebanon County: 43 indexLehigh County: 39 indexLycoming County: 39 indexMercer County: 40 indexMonroe County: 35 indexMontgomery County: 40 indexNorthampton County: 39 indexPhiladelphia County: 52 indexSomerset County: 37 indexSusquehanna County: 25 indexTioga County: 36 indexWashington County: 44 indexWestmoreland County: 39 indexWyoming County: 26 indexYork County: 44 index
  • Under 36
  • 36 to 37
  • 37 to 40
  • 40 to 42
  • 42 to 44
  • 44 and over
  • No data
Median Air Quality Index (US EPA), 2024, index. Lawrence 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), Lawrence County, 1980 to 2024) [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), Lawrence County, 1980 to 2024. 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/lawrence-county-pennsylvania. 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), Lawrence County, 1980 to 2024. 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/lawrence-county-pennsylvania.

Harvard

U.S. Environmental Protection Agency (2026) EPA AirData annual AQI by county: median daily AQI, Median Air Quality Index (US EPA), Lawrence County, 1980 to 2024 [Dataset]. Available at: https://aqs.epa.gov/aqsweb/airdata/download_files.html#Annual, via Invokely: https://invokely.ai/en/median-air-quality-index/lawrence-county-pennsylvania (Accessed: 12 October 2026).

BibTeX
@misc{environmental_median_air_quality_index_2024,
  author = {{U.S. Environmental Protection Agency}},
  title = {{EPA AirData annual AQI by county: median daily AQI: Median Air Quality Index (US EPA), Lawrence County, 1980 to 2024}},
  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/lawrence-county-pennsylvania. 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), Lawrence County, 1980 to 2024
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/lawrence-county-pennsylvania
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/en/median-air-quality-index/lawrence-county-pennsylvania.
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 Lawrence County?

Median Air Quality Index (US EPA) in Lawrence County was 24 in 2024, according to the U.S. Environmental Protection Agency. That is down 10 from 2023.

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 Lawrence County?

50 in 1981, the highest value since 1980 in this series.

Related statistics for Lawrence County

All statistics for Lawrence County | Lawrence County in figures