Data / Rankings / Share of days with good air quality (US EPA AQI) / Counties in New Mexico

Counties in New Mexico by share of days with good air quality (US EPA AQI)

Los Alamos County had the highest share of days with good air quality (US EPA AQI) of 18 counties in 2008, at 99.1%. Bernalillo County had the lowest, at 24.6%. The median was 89.2%. Source: EPA.

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Highest99.1Los Alamos County
Lowest24.6Bernalillo County
Median89.218 counties

Map of counties, 2008

Bernalillo County: 24.6 %Catron County: 98.1 %Chaves County: 86.5 %Doña Ana County: 25.7 %Eddy County: 64.8 %Grant County: 91.8 %Lea County: 70.4 %Lincoln County: 93.2 %Los Alamos County: 99.1 %Luna County: 81.7 %McKinley County: 97.1 %Rio Arriba County: 98.2 %Sandoval County: 48.1 %San Juan County: 56.3 %Santa Fe County: 80.6 %Socorro County: 99 %Taos County: 93.4 %Valencia County: 94.5 %
  • Under 60
  • 60 to 81
  • 81 to 93
  • 93 to 98
  • 98 and over
  • No data
%, 2008. Hatched areas have no value for this period. Source: Invokely calculation with data from EPA. Boundaries: U.S. Census Bureau cartographic boundary files.

All counties, 2008

Los Alamos County: 99.1 %Los Alamos County99.1Socorro County: 99 %Socorro County99Rio Arriba County: 98.2 %Rio Arriba County98.2Catron County: 98.1 %Catron County98.1McKinley County: 97.1 %McKinley County97.1Valencia County: 94.5 %Valencia County94.5Taos County: 93.4 %Taos County93.4Lincoln County: 93.2 %Lincoln County93.2Grant County: 91.8 %Grant County91.8Chaves County: 86.5 %Chaves County86.5Luna County: 81.7 %Luna County81.7Santa Fe County: 80.6 %Santa Fe County80.6Lea County: 70.4 %Lea County70.4Eddy County: 64.8 %Eddy County64.8San Juan County: 56.3 %San Juan County56.3Sandoval County: 48.1 %Sandoval County48.1Doña Ana County: 25.7 %Doña Ana County25.7Bernalillo County: 24.6 %Bernalillo County24.6Los Alamos County: 99.1 %Los Alamos County99.1Socorro County: 99 %Socorro County99Rio Arriba County: 98.2 %Rio Arriba County98.2Catron County: 98.1 %Catron County98.1McKinley County: 97.1 %McKinley County97.1Valencia County: 94.5 %Valencia County94.5Taos County: 93.4 %Taos County93.4Lincoln County: 93.2 %Lincoln County93.2Grant County: 91.8 %Grant County91.8Chaves County: 86.5 %Chaves County86.5Luna County: 81.7 %Luna County81.7Santa Fe County: 80.6 %Santa Fe County80.6Lea County: 70.4 %Lea County70.4Eddy County: 64.8 %Eddy County64.8San Juan County: 56.3 %San Juan County56.3Sandoval County: 48.1 %Sandoval County48.1Doña Ana County: 25.7 %Doña Ana County25.7Bernalillo County: 24.6 %Bernalillo County24.6
%. Source: Invokely calculation with data from EPA. Retrieved 2026-10-12.

Full ranking

RankCounties2008 (%)Change on 2007
1Los Alamos County99.1+1.6 pts
2Socorro County99+1.1 pts
3Rio Arriba County98.2-0.9 pts
4Catron County98.10 pts
5McKinley County97.1n/a
6Valencia County94.5-1.9 pts
7Taos County93.4+2.5 pts
8Lincoln County93.2-5.8 pts
9Grant County91.8+2.8 pts
10Chaves County86.5-0.7 pts
11Luna County81.7+2.5 pts
12Santa Fe County80.6-7.3 pts
13Lea County70.4-2.5 pts
14Eddy County64.8-13.8 pts
15San Juan County56.3+13.6 pts
16Sandoval County48.1+2.9 pts
17Doña Ana County25.7-9.9 pts
18Bernalillo County24.6+9.5 pts

Other periods

About this ranking

Days with a daily Air Quality Index of 0 to 50 (good) as a percentage of the days of the year with an AQI in a US county. Calculated by Invokely from the day counts in the EPA AirData annual summaries; both counts are stored with each value.

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.

Every value in the ranking comes from the same publisher and the same period, so the counties are compared on one definition. 3 counties with data in other periods have no value for 2008 and are left out rather than filled from another source. Equal values share a rank.

How to cite

U.S. Environmental Protection Agency, Air Quality System, AirData. EPA AirData annual AQI by county: good days as a share of days with an AQI, calculated with stored counts. 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: good days as a share of days with an AQI, calculated with stored counts (Counties in New Mexico by share of days with good air quality (US EPA AQI), 2008) [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: good days as a share of days with an AQI, calculated with stored counts, Counties in New Mexico by share of days with good air quality (US EPA AQI), 2008. U.S. Environmental Protection Agency, 13 July 2026, https://aqs.epa.gov/aqsweb/airdata/download_files.html#Annual. Invokely, https://invokely.ai/rankings/good-air-quality-days-share/new-mexico-counties?period=2008. Accessed 12 Oct. 2026.

Chicago (author-date)

U.S. Environmental Protection Agency. 2026. EPA AirData annual AQI by county: good days as a share of days with an AQI, calculated with stored counts. Counties in New Mexico by share of days with good air quality (US EPA AQI), 2008. Dataset. Accessed October 12, 2026. https://aqs.epa.gov/aqsweb/airdata/download_files.html#Annual. Also distributed by Invokely, https://invokely.ai/rankings/good-air-quality-days-share/new-mexico-counties?period=2008.

Harvard

U.S. Environmental Protection Agency (2026) EPA AirData annual AQI by county: good days as a share of days with an AQI, calculated with stored counts, Counties in New Mexico by share of days with good air quality (US EPA AQI), 2008 [Dataset]. Available at: https://aqs.epa.gov/aqsweb/airdata/download_files.html#Annual, via Invokely: https://invokely.ai/rankings/good-air-quality-days-share/new-mexico-counties?period=2008 (Accessed: 12 October 2026).

BibTeX
@misc{environmental_counties_in_new_mexico_2008,
  author = {{U.S. Environmental Protection Agency}},
  title = {{EPA AirData annual AQI by county: good days as a share of days with an AQI, calculated with stored counts: Counties in New Mexico by share of days with good air quality (US EPA AQI), 2008}},
  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/rankings/good-air-quality-days-share/new-mexico-counties?period=2008. Publisher attribution: U.S. Environmental Protection Agency, Air Quality System, AirData. EPA AirData annual AQI by county: good days as a share of days with an AQI, calculated with stored counts. 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: good days as a share of days with an AQI, calculated with stored counts: Counties in New Mexico by share of days with good air quality (US EPA AQI), 2008
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/rankings/good-air-quality-days-share/new-mexico-counties?period=2008
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/good-air-quality-days-share/new-mexico-counties?period=2008.
N1  - Publisher attribution: U.S. Environmental Protection Agency, Air Quality System, AirData. EPA AirData annual AQI by county: good days as a share of days with an AQI, calculated with stored counts. https://aqs.epa.gov/aqsweb/airdata/download_files.html#Annual. Retrieved 2026-10-12.
ER  -
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Questions

Which county has the highest share of days with good air quality (US EPA AQI)?

Los Alamos County, with 99.1% in 2008, according to EPA.

Which county has the lowest share of days with good air quality (US EPA AQI)?

Bernalillo County, with 24.6% in 2008.

Where does this ranking come from?

Every value comes from one source and one period, so the places are comparable: U.S. Environmental Protection Agency, EPA AirData annual AQI by county: good days as a share of days with an AQI, calculated with stored counts. Retrieved 2026-10-12. 3 counties have no value for 2008 and are not ranked.

Share of days with good air quality (US EPA AQI): other rankings

Counties in New Mexico: more rankings