Median Air Quality Index (US EPA) in Cameron County

Median Air Quality Index (US EPA) in Cameron County was 57 in 2025, according to the U.S. Environmental Protection Agency. That is down 4 from 2024. That is the 3rd highest of 45 counties in 2025.

2025, index57
Change on 2024-4
Series high612024
Series low141993

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 Cameron County, 1980 to 2025

1020304050607019801994200020062012201820251980: 28 index1989: 26 index1990: 22 index1991: 24 index1992: 26 index1993: 14 index1994: 25 index1995: 30 index1996: 23 index1997: 31 index1998: 29 index1999: 26 index2000: 31 index2001: 38 index2002: 42 index2003: 40 index2004: 39 index2005: 53 index2006: 52 index2007: 52 index2008: 53 index2009: 52 index2010: 48 index2011: 52 index2012: 51 index2013: 49 index2014: 51 index2015: 48 index2016: 45 index2017: 42 index2018: 51 index2019: 52 index2020: 52 index2021: 52 index2022: 48 index2023: 54 index2024: 61 index2025: 57 index02040608019802001201420251980: 28 index1989: 26 index1990: 22 index1991: 24 index1992: 26 index1993: 14 index1994: 25 index1995: 30 index1996: 23 index1997: 31 index1998: 29 index1999: 26 index2000: 31 index2001: 38 index2002: 42 index2003: 40 index2004: 39 index2005: 53 index2006: 52 index2007: 52 index2008: 53 index2009: 52 index2010: 48 index2011: 52 index2012: 51 index2013: 49 index2014: 51 index2015: 48 index2016: 45 index2017: 42 index2018: 51 index2019: 52 index2020: 52 index2021: 52 index2022: 48 index2023: 54 index2024: 61 index2025: 57 index
index. Source: EPA, EPA AirData annual AQI by county: median daily AQI. Retrieved 2026-10-12, published 2026-07-13.
All 38 values
Periodindex
202557
202461
202354
202248
202152
202052
201952
201851
201742
201645
201548
201451
201349
201251
201152
201048
200952
200853
200752
200652
200553
200439
200340
200242
200138
200031
199926
199829
199731
199623
199530
199425
199314
199226
199124
199022
198926
198028

Cameron County compared with nearby places

Atascosa County: 35 indexBell County: 45 indexBexar County: 52 indexBowie County: 48 indexBrazoria County: 35 indexBrazos County: 40 indexBrewster County: 43 indexCameron County: 57 indexCollin County: 40 indexCulberson County: 32 indexDallas County: 53 indexDenton County: 47 indexEctor County: 39 indexEllis County: 35 indexEl Paso County: 70 indexGalveston County: 45 indexGregg County: 36 indexHarris County: 62 indexHarrison County: 44 indexHidalgo County: 52 indexHood County: 38 indexHunt County: 34 indexJefferson County: 51 indexJohnson County: 37 indexKarnes County: 6 indexKaufman County: 44 indexKleberg County: 49 indexLubbock County: 24 indexMcLennan County: 51 indexMaverick County: 42 indexMontgomery County: 53 indexNavarro County: 47 indexNueces County: 53 indexOrange County: 45 indexParker County: 38 indexPolk County: 33 indexPotter County: 16 indexRandall County: 41 indexRockwall County: 31 indexSmith County: 35 indexTarrant County: 56 indexTravis County: 53 indexVictoria County: 34 indexWebb County: 51 indexWilson County: 8 index
  • Under 34
  • 34 to 38
  • 38 to 43
  • 43 to 47
  • 47 to 53
  • 53 and over
  • No data
Median Air Quality Index (US EPA), 2025, index. Cameron 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), Cameron 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), Cameron 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/cameron-county-texas. 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), Cameron 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/cameron-county-texas.

Harvard

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

Median Air Quality Index (US EPA) in Cameron County was 57 in 2025, according to the U.S. Environmental Protection Agency. That is down 4 from 2024. That is the 3rd highest of 45 counties in 2025.

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 Cameron County?

61 in 2024, the highest value since 1980 in this series.

Related statistics for Cameron County

All statistics for Cameron County | Cameron County in figures