Metro area air quality · 2025

Pocatello, ID

Median AQI 31 (Good). 91.5% of monitored days rated Good across this metro's EPA monitoring network.

31
Median AQI
91.5%
Good-air days
0
Unhealthy days
86%
Cleaner than US metros

Aggregated from EPA Air Quality System (2025), 304 monitored days. EPA AQS →

The verdict

The Pocatello, ID metro runs good on the EPA scale, cleaner than most US metros, a median AQI of 31 with 91.5% of 304 monitored days in the Good band.

31
median AQI · Good
91.5%
days rated Good
86%
cleaner than US metros
111
worst single reading

No day crossed into the Unhealthy tier across the metro's monitors in 2025.

Insights: Pocatello, ID metro. Aggregated EPA AQS monitors across this Core-Based Statistical Area logged a median Air Quality Index of 31 over 304 measured days in 2025, which corresponds to a Good band and a Excellent metro-wide health grade. The monitored-day split lands at 278 Good days (91%), 25 Moderate (8%), and 1 Unhealthy-for-Sensitive-Groups (0%). The 90th-percentile AQI finished at 47 while the highest single-day reading hit 111 (USG). Metro residents averaged roughly 27.4 clean-air days per 30-day window across the reporting year.

Across the 2020–2025 trend window, good days shifted by -6 and the median AQI moved -7 points, which classifies the multi-year trajectory as improving. The metro avoided any Unhealthy-tier days entirely, an outcome that typically reflects favorable wind patterns, lower industrial density, or effective regional emission controls. Metros with comparable AQI profiles include Erie, PA (81.4% good, AQI 31); Grants Pass, OR (76.2% good, AQI 31); Urban Honolulu, HI (95.0% good, AQI 31).

Air Quality Summary

Median AQI

31

Good

Good Days

91.5%

278 of 304 days

Max AQI

111

USG

Health Grade

Excellent

90th pct: 47

AQI Day Breakdown (2025)

Distribution of 304 monitored days across EPA AQI categories.

Good

278

91%

Moderate

25

8%

USG

1

0%

Unhealthy

0

0%

Very Unhealthy

0

0%

Hazardous

0

0%

Health Impact Assessment

Excellent

The Pocatello, ID metro area's air quality is rated Excellent based on 91.5% good air days. No unhealthy air days were recorded in 2025.

Air quality is generally acceptable. Unusually sensitive people should monitor real-time conditions at AirNow.gov during high-pollution events.

How does the Pocatello, ID metro compare?

How Pocatello, ID compares

Good-day share better than US avg
Pocatello, ID 91.5%
Erie, PA 81.4%
US average 71.3%
Median AQI better than US avg
Pocatello, ID 31
Erie, PA 31
US average 41
Unhealthy days / yr better than US avg
Pocatello, ID 0
Erie, PA 0
US average 1

5-Year Air Quality Trend

Air quality is improving in the Pocatello, ID metro. Best year: 2023 (293 good days).

Year Good Moderate Unhealthy Median AQI
2020 284 72 4 38
2021 245 112 1 44
2022 270 93 0 40
2023 293 39 0 41
2024 286 78 0 39
2025 278 25 0 31

Metros with Similar Air Quality

Metro areas across the US with a similar median AQI to Pocatello, ID.

Erie, PA

AQI 31 · 81.4% good

31

Grants Pass, OR

AQI 31 · 76.2% good

31

Urban Honolulu, HI

AQI 31 · 95.0% good

31

Victoria, TX

AQI 31 · 91.6% good

31

Bellingham, WA

AQI 30 · 96.6% good

30

Clarksburg, WV

AQI 32 · 73.3% good

32

More Air Quality Data

Explore EPA air quality rankings and guides across U.S. metros and counties.

Cleanest Metro Areas

U.S. metros ranked by their share of Good air-quality days.

Worst Air Quality

Counties and metros with the most unhealthy air days.

All Metro Areas

Annual AQI by CBSA for every monitored U.S. metro area.

Best and Worst City Air

What drives urban air quality and how metro areas compare.

Air Quality Guides

Frequently Asked Questions

What is the air quality in the Pocatello, ID metro area? ▼
The Pocatello, ID metro area has a median Air Quality Index (AQI) of 31, rated "Good." 91.5% of monitored days (278 out of 304) had good air quality in 2025.
How many unhealthy air days does Pocatello, ID have? ▼
In 2025, the Pocatello, ID metro area recorded 0 unhealthy air days (0 Unhealthy, 0 Very Unhealthy, 0 Hazardous). The maximum AQI reached 111.
Is air quality in Pocatello, ID getting better or worse? ▼
Air quality in the Pocatello, ID metro is improving based on 5-year trends (2020-2025). Best year: 2023 with 293 good days. Worst year: 2021 with 245 good days.
What does AQI 31 mean for health? ▼
An AQI of 31 is "Good", air quality is satisfactory and poses little or no health risk. This is the best category on the EPA's AQI scale.
What is the 90th percentile AQI for Pocatello, ID? ▼
The 90th percentile AQI for the Pocatello, ID metro area is 47, meaning 90% of monitored days had an AQI at or below this level. The maximum AQI recorded was 111 (USG).
How does Pocatello, ID compare to other metro areas? ▼
The Pocatello, ID metro has 91.5% good air days. Similar metros: Erie, PA (81.4% good), Grants Pass, OR (76.2% good), Urban Honolulu, HI (95.0% good).

Data Sources

Primary Source: U.S. Environmental Protection Agency (EPA), Air Quality System (AQS), Annual AQI by CBSA dataset, 2020–2025. See our methodology for how AQI, median, and coverage figures are computed.

Read our methodology , how this data is sourced, computed, and verified.

Source: U.S. EPA Air Quality System (AQS) Annual AQI by CBSA summary files (metro-level) · 2020–2025

Every figure on PlainAir is rendered directly from EPA AQS air-quality monitoring data, no number is typed in by an editor. This page draws directly on EPA AQS air-quality monitoring data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.