Metro area air quality · 2025

Logan, UT-ID

Median AQI 44 (Good). 66.0% of monitored days rated Good across this metro's EPA monitoring network.

44
Median AQI
66.0%
Good-air days
0
Unhealthy days
36%
Cleaner than US metros

Logan, UT-ID posted a 2025 median AQI of 44 (Good) with 66.0% Good days

According to the U.S. EPA Air Quality System, the Logan, UT-ID CBSA recorded a median AQI of 44 across 365 monitored days in 2025, with 66.0% rated Good and 0 unhealthy or worse. This is an annual metro comparison, not a live advisory.

Data source EPA Air Quality System (AQS)

Cleaner than US metros
The Logan, UT-ID CBSA's 66.0% Good-day share places it cleaner than 36% of US metros in 2025.
Closest median-AQI peer
Bartlesville, OK (68.0% Good, median AQI 44) is the closest nationwide median-AQI peer to Logan, UT-ID.
2020–2025 Good-day shift
Logan, UT-ID's Good-day share moved +9.2 points from 2020 to 2025 (median AQI -4).
Median AQI
Median AQI: 44

Aggregated from EPA Air Quality System (2025), 365 monitored days. EPA AQS →

The verdict

Logan, UT-ID's peak reading 87 stays in the lower max-AQI tercile on this extract. On the EPA scale the metro runs good, more polluted than the median US metro, with a median AQI of 44 and 66.0% of 365 monitored days in the Good band.

44
median AQI · Good
66.0%
days rated Good
36%
cleaner than US metros
87
worst single reading

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

Annual release change

What changed in the 2025 EPA annual release

2024 → 2025
  • Logan, UT-ID metro's peak single-day AQI fell from 101 to 87 between the 2024 and 2025 EPA annual releases, a change of -14 points.

Compared against 365 monitored days in 2024 and 365 in 2025. These are arithmetic differences between two stored EPA annual summaries, not a cause claim or a live advisory.

National release changes Two-year CSV

Logan, UT-ID's peak reading 87 stays in the lower max-AQI tercile on this extract. Signature read: peak AQI 87 (low tercile vs CBSA corpus). Aggregated EPA AQS monitors across this Core-Based Statistical Area logged a median Air Quality Index of 44 over 365 measured days in 2025 (Good / Moderate). The monitored-day split lands at 241 Good (66%), 124 Moderate (34%), and 0 Unhealthy-for-Sensitive-Groups (0%). The 90th-percentile AQI finished at 64; the highest single-day reading hit 87 (Moderate).

Across 2020–2025, Good-day share shifted +9.2 points and median AQI moved -4 (improving). No Unhealthy-tier days appear in this annual dataset. Metros with comparable AQI profiles include Bartlesville, OK (68.0% good, AQI 44); Berlin, NH-VT (81.5% good, AQI 44); Bloomington, IL (66.0% good, AQI 44).

Understanding AQI →

Air Quality Summary

Median AQI

44

Good

Good Days

66.0%

241 of 365 days

Max AQI

87

Moderate

Health Grade

Moderate

90th pct: 64

AQI Day Breakdown (2025)

Distribution of 365 monitored days across EPA AQI categories.

Good

241

66%

Moderate

124

34%

USG

0

0%

Unhealthy

0

0%

Very Unhealthy

0

0%

Hazardous

0

0%

Health Impact Assessment

Moderate

The Logan, UT-ID metro area's air quality is rated Moderate based on 66.0% 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 Logan, UT-ID metro compare?

How Logan, UT-ID compares

Good-day share worse than typical
Logan, UT-ID 66.0%
Bartlesville, OK 68.0%
Typical US metro 70.6%
Median AQI worse than typical
Logan, UT-ID 44
Bartlesville, OK 44
Typical US metro 41
Unhealthy days / yr better than typical
Logan, UT-ID 0
Bartlesville, OK 1
Typical US metro 1

5-Year Air Quality Trend

Air quality is improving in the Logan, UT-ID metro. Highest Good-day share: 2025 (66.0%, 241 of 365 monitored days).

Year Good Moderate Unhealthy Median AQI
2020 205 152 4 48
2021 210 144 0 46
2022 222 136 1 46
2023 218 139 4 48
2024 238 127 0 44
2025 241 124 0 44

Metros with a similar median AQI

CBSA peers nationwide whose annual median AQI sits near Logan, UT-ID (44).

Bartlesville, OK

Median AQI 44 · 68.0% Good-day share

44

Berlin, NH-VT

Median AQI 44 · 81.5% Good-day share

44

Bloomington, IL

Median AQI 44 · 66.0% Good-day share

44

Boston-Cambridge-Newton, MA-NH

Median AQI 44 · 71.0% Good-day share

44

Bridgeport-Stamford-Norwalk, CT

Median AQI 44 · 64.7% Good-day share

44

Buffalo-Cheektowaga-Niagara Falls, NY

Median AQI 44 · 63.8% Good-day share

44

Metros with similar unhealthy-day exposure

A second relationship type: metros whose unhealthy-or-worse day count is closest to Logan, UT-ID's 0 (independent of median AQI).

Aberdeen, SD

0 unhealthy-or-worse days · median AQI 27

27

Aberdeen, WA

0 unhealthy-or-worse days · median AQI 22

22

Adrian, MI

0 unhealthy-or-worse days · median AQI 41

41

Akron, OH

0 unhealthy-or-worse days · median AQI 45

45

Albany, GA

0 unhealthy-or-worse days · median AQI 46

46

Albany, OR

0 unhealthy-or-worse days · median AQI 27

27

Frequently Asked Questions

What is the 90th percentile AQI for Logan, UT-ID? ▼
The 90th percentile AQI for the Logan, UT-ID metro area is 64, meaning 90% of monitored days had an AQI at or below this level. The maximum AQI recorded was 87 (Moderate).
How many unhealthy air days does Logan, UT-ID have? ▼
In 2025, the Logan, UT-ID metro area recorded 0 unhealthy air days (0 Unhealthy, 0 Very Unhealthy, 0 Hazardous). The maximum AQI reached 87.
What is the air quality in the Logan, UT-ID metro area? ▼
The Logan, UT-ID metro area has a median Air Quality Index (AQI) of 44, rated "Good." 66.0% of monitored days (241 out of 365) had good air quality in 2025.
Is air quality in Logan, UT-ID getting better or worse? ▼
Air quality in the Logan, UT-ID metro is improving across floor-qualifying years (2020-2025); years with fewer than 100 monitored days are excluded from that direction. Highest qualifying Good-day share: 2025 at 66.0% (241 of 365 days). Lowest qualifying Good-day share: 2020 at 56.8% (205 of 361 days).
What does AQI 44 mean for health? ▼
An AQI of 44 is "Good", air quality is satisfactory and poses little or no health risk. This is the best category on the EPA's AQI scale.
How does Logan, UT-ID compare to other metro areas? ▼
The Logan, UT-ID metro has 66.0% good air days. Similar metros: Bartlesville, OK (68.0% good), Berlin, NH-VT (81.5% good), Bloomington, IL (66.0% good).

Data Sources

Primary Source: U.S. Environmental Protection Agency (EPA), Air Quality System (AQS), Annual AQI by CBSA dataset for Logan, UT-ID, 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, Logan, UT-ID · 2020–2025