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

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

Garden County had the highest share of days with good air quality (US EPA AQI) of 14 counties in 2002, at 95.8%. Douglas County had the lowest, at 42.5%. The median was 80.8%. Source: EPA.

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Highest95.8Garden County
Lowest42.5Douglas County
Median80.814 counties

Map of counties, 2002

Cass County: 78.9 %Cedar County: 71.3 %Cherry County: 94.8 %Dawson County: 71.2 %Deuel County: 91.3 %Douglas County: 42.5 %Garden County: 95.8 %Hall County: 72.8 %Lancaster County: 85.2 %Lincoln County: 82.6 %Sarpy County: 52.2 %Scotts Bluff County: 89.6 %Thomas County: 94.1 %Washington County: 58.5 %
  • Under 66
  • 66 to 74
  • 74 to 85
  • 85 to 92
  • 92 and over
  • No data
%, 2002. 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, 2002

Garden County: 95.8 %Garden County95.8Cherry County: 94.8 %Cherry County94.8Thomas County: 94.1 %Thomas County94.1Deuel County: 91.3 %Deuel County91.3Scotts Bluff County: 89.6 %Scotts Bluff County89.6Lancaster County: 85.2 %Lancaster County85.2Lincoln County: 82.6 %Lincoln County82.6Cass County: 78.9 %Cass County78.9Hall County: 72.8 %Hall County72.8Cedar County: 71.3 %Cedar County71.3Dawson County: 71.2 %Dawson County71.2Washington County: 58.5 %Washington County58.5Sarpy County: 52.2 %Sarpy County52.2Douglas County: 42.5 %Douglas County42.5Garden County: 95.8 %Garden County95.8Cherry County: 94.8 %Cherry County94.8Thomas County: 94.1 %Thomas County94.1Deuel County: 91.3 %Deuel County91.3Scotts Bluff County: 89.6 %Scotts Bluff County89.6Lancaster County: 85.2 %Lancaster County85.2Lincoln County: 82.6 %Lincoln County82.6Cass County: 78.9 %Cass County78.9Hall County: 72.8 %Hall County72.8Cedar County: 71.3 %Cedar County71.3Dawson County: 71.2 %Dawson County71.2Washington County: 58.5 %Washington County58.5Sarpy County: 52.2 %Sarpy County52.2Douglas County: 42.5 %Douglas County42.5
%. Source: Invokely calculation with data from EPA. Retrieved 2026-10-12.

Full ranking

RankCounties2002 (%)Change on 2001
1Garden County95.8n/a
2Cherry County94.8+2.1 pts
3Thomas County94.1n/a
4Deuel County91.3+5.6 pts
5Scotts Bluff County89.6+5.9 pts
6Lancaster County85.2+1.1 pts
7Lincoln County82.6+4.9 pts
8Cass County78.9-3.2 pts
9Hall County72.8+8.6 pts
10Cedar County71.3+12.3 pts
11Dawson County71.2-4.2 pts
12Washington County58.5+6.3 pts
13Sarpy County52.2+3.7 pts
14Douglas County42.5+2.8 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. 10 counties with data in other periods have no value for 2002 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 Nebraska by share of days with good air quality (US EPA AQI), 2002) [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 Nebraska by share of days with good air quality (US EPA AQI), 2002. 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/nebraska-counties?period=2002. 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 Nebraska by share of days with good air quality (US EPA AQI), 2002. 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/nebraska-counties?period=2002.

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 Nebraska by share of days with good air quality (US EPA AQI), 2002 [Dataset]. Available at: https://aqs.epa.gov/aqsweb/airdata/download_files.html#Annual, via Invokely: https://invokely.ai/rankings/good-air-quality-days-share/nebraska-counties?period=2002 (Accessed: 12 October 2026).

BibTeX
@misc{environmental_counties_in_nebraska_by_2002,
  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 Nebraska by share of days with good air quality (US EPA AQI), 2002}},
  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/nebraska-counties?period=2002. 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 Nebraska by share of days with good air quality (US EPA AQI), 2002
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/nebraska-counties?period=2002
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/good-air-quality-days-share/nebraska-counties?period=2002.
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)?

Garden County, with 95.8% in 2002, according to EPA.

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

Douglas County, with 42.5% in 2002.

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. 10 counties have no value for 2002 and are not ranked.

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

Counties in Nebraska: more rankings