Data / Share of days with good air quality (US EPA AQI) / Thomas County

Share of days with good air quality (US EPA AQI) in Thomas County

Share of days with good air quality (US EPA AQI) in Thomas County was 92.4% in 2025, according to EPA. That is down 7.6 pts from 2024.

202592.4%
Change on 2024-7.6 pts
Series high1002024
Series low85.22003

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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Share of days with good air quality (US EPA AQI) in Thomas County, 2002 to 2025

8590951002002200620102014201820252002: 94.1 %2003: 85.2 %2004: 92 %2005: 90.5 %2006: 95.5 %2007: 93.3 %2008: 95.5 %2009: 94.8 %2010: 94.5 %2011: 93 %2012: 88.5 %2013: 90.3 %2014: 97.9 %2015: 94.9 %2016: 99.1 %2017: 94.8 %2018: 91.2 %2019: 96.3 %2020: 94.8 %2021: 94.9 %2022: 95.5 %2024: 100 %2025: 92.4 %85909510020022010201820252002: 94.1 %2003: 85.2 %2004: 92 %2005: 90.5 %2006: 95.5 %2007: 93.3 %2008: 95.5 %2009: 94.8 %2010: 94.5 %2011: 93 %2012: 88.5 %2013: 90.3 %2014: 97.9 %2015: 94.9 %2016: 99.1 %2017: 94.8 %2018: 91.2 %2019: 96.3 %2020: 94.8 %2021: 94.9 %2022: 95.5 %2024: 100 %2025: 92.4 %
%. Source: Invokely calculation with data from EPA. Retrieved 2026-10-12, published 2026-07-13.
All 23 values
Period%
202592.4
2024100
202295.5
202194.9
202094.8
201996.3
201891.2
201794.8
201699.1
201594.9
201497.9
201390.3
201288.5
201193
201094.5
200994.8
200895.5
200793.3
200695.5
200590.5
200492
200385.2
200294.1

Thomas County compared with nearby places

Cass County: 95.9 %Douglas County: 71 %Gage County: 75.8 %Hall County: 82.5 %Knox County: 92 %Lancaster County: 85.4 %Sarpy County: 78.8 %Scotts Bluff County: 95.8 %Sioux County: 87.4 %Thomas County: 92.4 %Washington County: 86.6 %
  • Under 79
  • 79 to 85
  • 85 to 87
  • 87 to 92
  • 92 and over
  • No data
Share of days with good air quality (US EPA AQI), 2025, %. Thomas 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

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.

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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 (Share of days with good air quality (US EPA AQI), Thomas County, 2002 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: good days as a share of days with an AQI, calculated with stored counts, Share of days with good air quality (US EPA AQI), Thomas County, 2002 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/good-air-quality-days-share/thomas-county-nebraska. 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. Share of days with good air quality (US EPA AQI), Thomas County, 2002 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/good-air-quality-days-share/thomas-county-nebraska.

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, Share of days with good air quality (US EPA AQI), Thomas County, 2002 to 2025 [Dataset]. Available at: https://aqs.epa.gov/aqsweb/airdata/download_files.html#Annual, via Invokely: https://invokely.ai/en/good-air-quality-days-share/thomas-county-nebraska (Accessed: 12 October 2026).

BibTeX
@misc{environmental_share_of_days_with_2025,
  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: Share of days with good air quality (US EPA AQI), Thomas County, 2002 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/good-air-quality-days-share/thomas-county-nebraska. 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: Share of days with good air quality (US EPA AQI), Thomas County, 2002 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/good-air-quality-days-share/thomas-county-nebraska
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/en/good-air-quality-days-share/thomas-county-nebraska.
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

What is the share of days with good air quality (US EPA AQI) in Thomas County?

Share of days with good air quality (US EPA AQI) in Thomas County was 92.4% in 2025, according to EPA. That is down 7.6 pts from 2024.

Where does this figure come from?

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 by Invokely on 2026-10-12.

What was the highest share of days with good air quality (US EPA AQI) in Thomas County?

100% in 2024, the highest value since 2002 in this series.

Related statistics for Thomas County

All statistics for Thomas County | Thomas County in figures