Data / Highest daily Air Quality Index (US EPA) / Saginaw County

Highest daily Air Quality Index (US EPA) in Saginaw County

Highest daily Air Quality Index (US EPA) in Saginaw County was 125 in 2005, according to the U.S. Environmental Protection Agency. That is up 31 from 2004.

2005, index125
Change on 2004+31
Series high1771980
Series low311995

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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Highest daily Air Quality Index (US EPA) in Saginaw County, 1980 to 2005

0501001502001980198419881992199920051980: 177 index1981: 119 index1982: 68 index1983: 68 index1984: 79 index1985: 135 index1986: 113 index1987: 104 index1988: 82 index1989: 94 index1990: 61 index1991: 72 index1992: 96 index1993: 51 index1994: 44 index1995: 31 index1999: 101 index2000: 94 index2001: 119 index2002: 94 index2003: 96 index2004: 94 index2005: 125 index05010015020019801988199920051980: 177 index1981: 119 index1982: 68 index1983: 68 index1984: 79 index1985: 135 index1986: 113 index1987: 104 index1988: 82 index1989: 94 index1990: 61 index1991: 72 index1992: 96 index1993: 51 index1994: 44 index1995: 31 index1999: 101 index2000: 94 index2001: 119 index2002: 94 index2003: 96 index2004: 94 index2005: 125 index
index. Source: EPA, EPA AirData annual AQI by county: highest daily AQI. Retrieved 2026-10-12, published 2026-07-13.
All 23 values
Periodindex
2005125
200494
200396
200294
2001119
200094
1999101
199531
199444
199351
199296
199172
199061
198994
198882
1987104
1986113
1985135
198479
198368
198268
1981119
1980177

Saginaw County compared with nearby places

Allegan County: 208 indexBay County: 124 indexBenzie County: 177 indexBerrien County: 177 indexCass County: 164 indexChippewa County: 126 indexClinton County: 143 indexDickinson County: 68 indexGenesee County: 150 indexHuron County: 151 indexIngham County: 174 indexIron County: 60 indexKalamazoo County: 156 indexKent County: 172 indexKeweenaw County: 73 indexLeelanau County: 172 indexLenawee County: 179 indexMacomb County: 195 indexMason County: 187 indexMissaukee County: 151 indexMonroe County: 163 indexMuskegon County: 208 indexOakland County: 151 indexOttawa County: 182 indexSaginaw County: 125 indexSt. Clair County: 202 indexSchoolcraft County: 182 indexTuscola County: 156 indexWashtenaw County: 200 indexWayne County: 169 indexWexford County: 129 index
  • Under 130
  • 130 to 150
  • 150 to 160
  • 160 to 180
  • 180 to 190
  • 190 and over
  • No data
Highest daily Air Quality Index (US EPA), 2005, index. Saginaw 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

Highest daily Air Quality Index (AQI) value recorded in a US county during the year, from the EPA AirData annual summaries. Values above 500 are beyond the AQI scale and are published as EPA computes them.

A single day decides the value, so one wildfire or dust event can set it. Dust from the dry Owens Lake bed puts Inyo and Mono counties in California in the thousands. 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: highest daily AQI. 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: highest daily AQI (Highest daily Air Quality Index (US EPA), Saginaw County, 1980 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: highest daily AQI, Highest daily Air Quality Index (US EPA), Saginaw County, 1980 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/highest-daily-air-quality-index/saginaw-county-michigan. Accessed 12 Oct. 2026.

Chicago (author-date)

U.S. Environmental Protection Agency. 2026. EPA AirData annual AQI by county: highest daily AQI. Highest daily Air Quality Index (US EPA), Saginaw County, 1980 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/highest-daily-air-quality-index/saginaw-county-michigan.

Harvard

U.S. Environmental Protection Agency (2026) EPA AirData annual AQI by county: highest daily AQI, Highest daily Air Quality Index (US EPA), Saginaw County, 1980 to 2005 [Dataset]. Available at: https://aqs.epa.gov/aqsweb/airdata/download_files.html#Annual, via Invokely: https://invokely.ai/en/highest-daily-air-quality-index/saginaw-county-michigan (Accessed: 12 October 2026).

BibTeX
@misc{environmental_highest_daily_air_quality_2005,
  author = {{U.S. Environmental Protection Agency}},
  title = {{EPA AirData annual AQI by county: highest daily AQI: Highest daily Air Quality Index (US EPA), Saginaw County, 1980 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/highest-daily-air-quality-index/saginaw-county-michigan. Publisher attribution: U.S. Environmental Protection Agency, Air Quality System, AirData. EPA AirData annual AQI by county: highest daily AQI. 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: highest daily AQI: Highest daily Air Quality Index (US EPA), Saginaw County, 1980 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/highest-daily-air-quality-index/saginaw-county-michigan
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/en/highest-daily-air-quality-index/saginaw-county-michigan.
N1  - Publisher attribution: U.S. Environmental Protection Agency, Air Quality System, AirData. EPA AirData annual AQI by county: highest daily AQI. https://aqs.epa.gov/aqsweb/airdata/download_files.html#Annual. Retrieved 2026-10-12.
ER  -
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Questions

What is the highest daily Air Quality Index (US EPA) in Saginaw County?

Highest daily Air Quality Index (US EPA) in Saginaw County was 125 in 2005, according to the U.S. Environmental Protection Agency. That is up 31 from 2004.

Where does this figure come from?

U.S. Environmental Protection Agency. EPA AirData annual AQI by county: highest daily AQI. Retrieved by Invokely on 2026-10-12.

What was the highest highest daily Air Quality Index (US EPA) in Saginaw County?

177 in 1980, the highest value since 1980 in this series.

Related statistics for Saginaw County

All statistics for Saginaw County | Saginaw County in figures