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

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

Highest daily Air Quality Index (US EPA) in Piscataquis County was 64 in 2011, according to the U.S. Environmental Protection Agency. That is down 10 from 2010.

2011, index64
Change on 2010-10
Series high1641999
Series low641993

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 Piscataquis County, 1993 to 2011

6080100120140160180199319951998200020111993: 64 index1994: 115 index1995: 147 index1996: 101 index1998: 115 index1999: 164 index2000: 93 index2001: 133 index2010: 74 index2011: 64 index50751001251501751993199820111993: 64 index1994: 115 index1995: 147 index1996: 101 index1998: 115 index1999: 164 index2000: 93 index2001: 133 index2010: 74 index2011: 64 index
index. Source: EPA, EPA AirData annual AQI by county: highest daily AQI. Retrieved 2026-10-12, published 2026-07-13.
All 10 values
Periodindex
201164
201074
2001133
200093
1999164
1998115
1996101
1995147
1994115
199364

Piscataquis County compared with nearby places

Androscoggin County: 93 indexAroostook County: 70 indexCumberland County: 161 indexHancock County: 166 indexKennebec County: 97 indexKnox County: 115 indexOxford County: 71 indexPenobscot County: 82 indexPiscataquis County: 64 indexSagadahoc County: 87 indexWashington County: 105 indexYork County: 151 index
  • Under 73
  • 73 to 89
  • 89 to 100
  • 100 to 140
  • 140 and over
  • No data
Highest daily Air Quality Index (US EPA), 2011, index. Piscataquis 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), Piscataquis County, 1993 to 2011) [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), Piscataquis County, 1993 to 2011. 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/piscataquis-county-maine. 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), Piscataquis County, 1993 to 2011. 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/piscataquis-county-maine.

Harvard

U.S. Environmental Protection Agency (2026) EPA AirData annual AQI by county: highest daily AQI, Highest daily Air Quality Index (US EPA), Piscataquis County, 1993 to 2011 [Dataset]. Available at: https://aqs.epa.gov/aqsweb/airdata/download_files.html#Annual, via Invokely: https://invokely.ai/en/highest-daily-air-quality-index/piscataquis-county-maine (Accessed: 12 October 2026).

BibTeX
@misc{environmental_highest_daily_air_quality_2011,
  author = {{U.S. Environmental Protection Agency}},
  title = {{EPA AirData annual AQI by county: highest daily AQI: Highest daily Air Quality Index (US EPA), Piscataquis County, 1993 to 2011}},
  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/piscataquis-county-maine. 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), Piscataquis County, 1993 to 2011
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/piscataquis-county-maine
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/en/highest-daily-air-quality-index/piscataquis-county-maine.
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 Piscataquis County?

Highest daily Air Quality Index (US EPA) in Piscataquis County was 64 in 2011, according to the U.S. Environmental Protection Agency. That is down 10 from 2010.

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 Piscataquis County?

164 in 1999, the highest value since 1993 in this series.

Related statistics for Piscataquis County

All statistics for Piscataquis County | Piscataquis County in figures