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

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

Share of days with good air quality (US EPA AQI) in Putnam County was 93.3% in 2005, according to EPA. That is down 6.7 pts from 2004.

200593.3%
Change on 2004-6.7 pts
Series high1002004
Series low93.32005

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Share of days with good air quality (US EPA AQI) in Putnam County, 2000 to 2005

929496981002000200120022003200420052000: 95.1 %2001: 98.3 %2002: 98.4 %2003: 96.6 %2004: 100 %2005: 93.3 %929496981002000200220052000: 95.1 %2001: 98.3 %2002: 98.4 %2003: 96.6 %2004: 100 %2005: 93.3 %
%. Source: Invokely calculation with data from EPA. Retrieved 2026-10-12, published 2026-07-13.
All 6 values
Period%
200593.3
2004100
200396.6
200298.4
200198.3
200095.1

Putnam County compared with nearby places

Allen County: 27.9 %Boone County: 53 %Carroll County: 56.5 %Clark County: 39 %Delaware County: 38 %Dubois County: 15.8 %Elkhart County: 37.3 %Floyd County: 41.6 %Greene County: 49.2 %Hamilton County: 52.5 %Hancock County: 56.6 %Hendricks County: 78.6 %Henry County: 21.6 %Howard County: 26.1 %Huntington County: 55.6 %Jackson County: 49.7 %Johnson County: 56.8 %Knox County: 61.5 %Lake County: 12.1 %LaPorte County: 39.4 %Madison County: 45.6 %Marion County: 13.7 %Morgan County: 51.9 %Perry County: 47.8 %Porter County: 57.1 %Posey County: 55.7 %Putnam County: 93.3 %St. Joseph County: 51.7 %Shelby County: 53 %Spencer County: 18.2 %Tippecanoe County: 26.2 %Vanderburgh County: 16.4 %Vigo County: 44.7 %Wabash County: 76.5 %Warrick County: 41 %Washington County: 31.1 %Whitley County: 79.3 %
  • Under 26
  • 26 to 39
  • 39 to 48
  • 48 to 53
  • 53 to 57
  • 57 and over
  • No data
Share of days with good air quality (US EPA AQI), 2005, %. Putnam 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), Putnam County, 2000 to 2005) [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), Putnam County, 2000 to 2005. 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/putnam-county-indiana. 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), Putnam County, 2000 to 2005. 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/putnam-county-indiana.

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), Putnam County, 2000 to 2005 [Dataset]. Available at: https://aqs.epa.gov/aqsweb/airdata/download_files.html#Annual, via Invokely: https://invokely.ai/en/good-air-quality-days-share/putnam-county-indiana (Accessed: 12 October 2026).

BibTeX
@misc{environmental_share_of_days_with_2005,
  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), Putnam County, 2000 to 2005}},
  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/putnam-county-indiana. 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), Putnam County, 2000 to 2005
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/putnam-county-indiana
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/en/good-air-quality-days-share/putnam-county-indiana.
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 Putnam County?

Share of days with good air quality (US EPA AQI) in Putnam County was 93.3% in 2005, according to EPA. That is down 6.7 pts from 2004.

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 Putnam County?

100% in 2004, the highest value since 2000 in this series.

Related statistics for Putnam County

All statistics for Putnam County | Putnam County in figures