Data / Share of days unhealthy for sensitive groups or worse (US EPA AQI) / Presque Isle County

Share of days unhealthy for sensitive groups or worse (US EPA AQI) in Presque Isle County

Share of days unhealthy for sensitive groups or worse (US EPA AQI) in Presque Isle County was 0% in 2007, according to EPA. That is the 28th highest of 30 counties in 2007.

20070%
Rank28th of 30Counties in Michigan ranked

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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Source: Invokely calculation with data from EPA. Retrieved 2026-10-12.

All 1 values
Period%
20070

Presque Isle County compared with nearby places

Allegan County: 11.2 %Bay County: 0 %Benzie County: 8.2 %Berrien County: 10.8 %Cass County: 7.7 %Chippewa County: 1.9 %Clinton County: 4.4 %Genesee County: 6.3 %Huron County: 10.4 %Ingham County: 5.6 %Kalamazoo County: 6.3 %Kent County: 7.1 %Keweenaw County: 0 %Leelanau County: 7.8 %Lenawee County: 8.5 %Macomb County: 7.9 %Manistee County: 7.1 %Mason County: 9.8 %Missaukee County: 4.6 %Monroe County: 2.5 %Muskegon County: 6.2 %Oakland County: 6.5 %Ottawa County: 4.7 %Presque Isle County: 0 %St. Clair County: 8.3 %Schoolcraft County: 7.6 %Tuscola County: 5.7 %Washtenaw County: 4.9 %Wayne County: 8.2 %Wexford County: 4.8 %
  • Under 4.1
  • 4.1 to 5.4
  • 5.4 to 6.4
  • 6.4 to 7.7
  • 7.7 to 8.3
  • 8.3 and over
  • No data
Share of days unhealthy for sensitive groups or worse (US EPA AQI), 2007, %. Presque Isle 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 above 100 (unhealthy for sensitive groups, unhealthy, very unhealthy or hazardous) 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; the counts are stored with each value.

Use the share rather than the number of days to compare counties, since the days with an AQI differ. 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: days with an AQI above 100 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: days with an AQI above 100 as a share of days with an AQI, calculated with stored counts (Share of days unhealthy for sensitive groups or worse (US EPA AQI), Presque Isle County, 2007) [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: days with an AQI above 100 as a share of days with an AQI, calculated with stored counts, Share of days unhealthy for sensitive groups or worse (US EPA AQI), Presque Isle County, 2007. U.S. Environmental Protection Agency, 13 July 2026, https://aqs.epa.gov/aqsweb/airdata/download_files.html#Annual. Invokely, https://invokely.ai/en/unhealthy-air-quality-days-share/presque-isle-county-michigan. Accessed 12 Oct. 2026.

Chicago (author-date)

U.S. Environmental Protection Agency. 2026. EPA AirData annual AQI by county: days with an AQI above 100 as a share of days with an AQI, calculated with stored counts. Share of days unhealthy for sensitive groups or worse (US EPA AQI), Presque Isle County, 2007. Dataset. Accessed October 12, 2026. https://aqs.epa.gov/aqsweb/airdata/download_files.html#Annual. Also distributed by Invokely, https://invokely.ai/en/unhealthy-air-quality-days-share/presque-isle-county-michigan.

Harvard

U.S. Environmental Protection Agency (2026) EPA AirData annual AQI by county: days with an AQI above 100 as a share of days with an AQI, calculated with stored counts, Share of days unhealthy for sensitive groups or worse (US EPA AQI), Presque Isle County, 2007 [Dataset]. Available at: https://aqs.epa.gov/aqsweb/airdata/download_files.html#Annual, via Invokely: https://invokely.ai/en/unhealthy-air-quality-days-share/presque-isle-county-michigan (Accessed: 12 October 2026).

BibTeX
@misc{environmental_share_of_days_unhealthy_2007,
  author = {{U.S. Environmental Protection Agency}},
  title = {{EPA AirData annual AQI by county: days with an AQI above 100 as a share of days with an AQI, calculated with stored counts: Share of days unhealthy for sensitive groups or worse (US EPA AQI), Presque Isle County, 2007}},
  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/unhealthy-air-quality-days-share/presque-isle-county-michigan. Publisher attribution: U.S. Environmental Protection Agency, Air Quality System, AirData. EPA AirData annual AQI by county: days with an AQI above 100 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: days with an AQI above 100 as a share of days with an AQI, calculated with stored counts: Share of days unhealthy for sensitive groups or worse (US EPA AQI), Presque Isle County, 2007
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/unhealthy-air-quality-days-share/presque-isle-county-michigan
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/en/unhealthy-air-quality-days-share/presque-isle-county-michigan.
N1  - Publisher attribution: U.S. Environmental Protection Agency, Air Quality System, AirData. EPA AirData annual AQI by county: days with an AQI above 100 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 unhealthy for sensitive groups or worse (US EPA AQI) in Presque Isle County?

Share of days unhealthy for sensitive groups or worse (US EPA AQI) in Presque Isle County was 0% in 2007, according to EPA. That is the 28th highest of 30 counties in 2007.

Where does this figure come from?

U.S. Environmental Protection Agency. EPA AirData annual AQI by county: days with an AQI above 100 as a share of days with an AQI, calculated with stored counts. Retrieved by Invokely on 2026-10-12.

Related statistics for Presque Isle County

All statistics for Presque Isle County | Presque Isle County in figures