Metro area air quality · 2025

Juneau, AK

Median AQI 23 (Good). 84.3% of monitored days rated Good across this metro's EPA monitoring network.

Compiled by PlainAirData · August 23, 2026

23
Median AQI: 84.3%
Good-air days: 0
Unhealthy days: 76%
Cleaner than US metros

Juneau, AK posted a 2025 median AQI of 23 (Good) with 84.3% Good days

According to the U.S. EPA Air Quality System, the Juneau, AK CBSA recorded a median AQI of 23 across 363 monitored days in 2025, with 84.3% 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 Juneau, AK CBSA's 84.3% Good-day share places it cleaner than 76% of US metros in 2025.
Closest median-AQI peer: Bend-Redmond, OR (89.3% Good, median AQI 23) is the closest nationwide median-AQI peer to Juneau, AK.
2020–2025 Good-day shift: Juneau, AK's Good-day share moved -4.4 points from 2020 to 2025 (median AQI +4).
Median AQI: Median AQI: 23

Aggregated from EPA Air Quality System (2025), 363 monitored days. EPA AQS →

The verdict

Juneau, AK sits in the upper Good-day tercile among EPA CBSA metros on this site (84.3% of 363 monitored days). On the EPA scale the metro runs good, cleaner than most US metros, with a median AQI of 23 and 84.3% of 363 monitored days in the Good band.

23
median AQI · Good: 84.3%
days rated Good: 76%
cleaner than US metros: 138
worst single reading

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

Juneau, AK metro's peak single-day AQI rose from 84 to 138 between the 2024 and 2025 EPA annual releases, a change of +54 points.

Juneau, AK sits in the upper Good-day tercile among EPA CBSA metros on this site (84.3% of 363 monitored days). Signature read: 84.3% Good-day share (high tercile vs CBSA corpus). Aggregated EPA AQS monitors across this Core-Based Statistical Area logged a median Air Quality Index of 23 over 363 measured days in 2025 (Good / Good). The monitored-day split lands at 306 Good (84%), 56 Moderate (15%), and 1 Unhealthy-for-Sensitive-Groups (0%). The 90th-percentile AQI finished at 58; the highest single-day reading hit 138 (USG).

Across 2020–2025, Good-day share shifted -4.4 points and median AQI moved +4 (worsening). No Unhealthy-tier days appear in this annual dataset. Metros with comparable AQI profiles include Bend-Redmond, OR (89.3% good, AQI 23); Cañon City, CO (93.4% good, AQI 23); Pullman, WA (86.8% good, AQI 23).

Health effects of air pollution →

Air Quality Summary

Median AQI

Good

Good Days

84.3%

306 of 363 days

Max AQI

138

USG

Health Grade

Good

90th pct: 58

AQI Day Breakdown (2025)

Distribution of 363 monitored days across EPA AQI categories.

Good

306

84%

Moderate

15%

USG

Unhealthy

Very Unhealthy

Hazardous

Health Impact Assessment

Good

The Juneau, AK metro area's air quality is rated Good based on 84.3% 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 Juneau, AK metro compare?

How Juneau, AK compares

Compare against

Good-day share better than typical

Juneau, AK 84.3%

Bend-Redmond, OR 89.3%

Typical US metro 70.6%

Median AQI better than typical

Juneau, AK 23

Bend-Redmond, OR 23

Typical US metro 41

Unhealthy days / yr better than typical

Juneau, AK 0

Bend-Redmond, OR 1

Typical US metro 1

5-Year Air Quality Trend

Air quality is worsening in the Juneau, AK metro. Highest Good-day share: 2020 (88.9%, 320 of 360 monitored days).

Year	Good	Moderate	Median AQI	Max AQI
2020	320	40	19	101
2021	315	42	20	89
2022	291	51	21	95
2023	314	50	24	78
2024	304	52	24	84
2025	306	56	23	138

Metros with a similar median AQI

CBSA peers nationwide whose annual median AQI sits near Juneau, AK (23).

Bend-Redmond, OR

Median AQI 23 · 89.3% Good-day share

Cañon City, CO

Median AQI 23 · 93.4% Good-day share

Pullman, WA

Median AQI 23 · 86.8% Good-day share

Shelton, WA

Median AQI 23 · 90.4% Good-day share

Aberdeen, WA

Median AQI 22 · 97.3% Good-day share

Bremerton-Silverdale, WA

Median AQI 22 · 95.5% Good-day share

Metros with similar unhealthy-day exposure

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

Aberdeen, SD

0 unhealthy-or-worse days · median AQI 27

Adrian, MI

0 unhealthy-or-worse days · median AQI 41

Akron, OH

0 unhealthy-or-worse days · median AQI 45

Albany, GA

0 unhealthy-or-worse days · median AQI 46

Albany, OR

0 unhealthy-or-worse days · median AQI 27

Albany-Schenectady-Troy, NY

0 unhealthy-or-worse days · median AQI 41

Frequently Asked Questions

How many unhealthy air days does Juneau, AK have? ▼

In 2025, the Juneau, AK metro area recorded 0 unhealthy air days (0 Unhealthy, 0 Very Unhealthy, 0 Hazardous). The maximum AQI reached 138.

What is the air quality in the Juneau, AK metro area? ▼

The Juneau, AK metro area has a median Air Quality Index (AQI) of 23, rated "Good." 84.3% of monitored days (306 out of 363) had good air quality in 2025.

Is air quality in Juneau, AK getting better or worse? ▼

Air quality in the Juneau, AK metro is worsening across floor-qualifying years (2020-2025); years with fewer than 100 monitored days are excluded from that direction. Highest qualifying Good-day share: 2020 at 88.9% (320 of 360 days). Lowest qualifying Good-day share: 2025 at 84.5% (306 of 362 days).

What does AQI 23 mean for health? ▼

An AQI of 23 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 Juneau, AK compare to other metro areas? ▼

The Juneau, AK metro has 84.3% good air days. Similar metros: Bend-Redmond, OR (89.3% good), Cañon City, CO (93.4% good), Pullman, WA (86.8% good).

What is the 90th percentile AQI for Juneau, AK? ▼

The 90th percentile AQI for the Juneau, AK metro area is 58, meaning 90% of monitored days had an AQI at or below this level. The maximum AQI recorded was 138 (USG).

Data Sources

Primary Source: U.S. Environmental Protection Agency (EPA), Air Quality System (AQS), Annual AQI by CBSA dataset for Juneau, AK, 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, Juneau, AK · 2020–2025 Accessed 2026-07-06