Metro area air quality · 2025

Port Angeles, WA

Median AQI 29 (Good). 85.5% of monitored days rated Good across this metro's EPA monitoring network.

29
Median AQI
85.5%
Good-air days
0
Unhealthy days
79%
Cleaner than US metros

Port Angeles, WA posted a 2025 median AQI of 29 (Good) with 85.5% Good days

According to the U.S. EPA Air Quality System, the Port Angeles, WA CBSA recorded a median AQI of 29 across 365 monitored days in 2025, with 85.5% 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 Port Angeles, WA CBSA's 85.5% Good-day share places it cleaner than 79% of US metros in 2025.
Closest median-AQI peer
Urban Honolulu, HI (97.3% Good, median AQI 29) is the closest nationwide median-AQI peer to Port Angeles, WA.
2020–2025 Good-day shift
Port Angeles, WA's Good-day share moved +1.0 points from 2020 to 2025 (median AQI -8).
Median AQI
Median AQI: 29

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

The verdict

The Port Angeles, WA metro runs good on the EPA scale, cleaner than most US metros, a median AQI of 29 with 85.5% of 365 monitored days in the Good band.

29
median AQI · Good
85.5%
days rated Good
79%
cleaner than US metros
69
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
  • Port Angeles, WA metro's median AQI fell from 36 to 29 between the 2024 and 2025 EPA annual releases, a change of -7 points.
  • Port Angeles, WA metro's Good-day share fell from 87.7% to 85.5% between the 2024 and 2025 EPA annual releases, a change of -2.2 percentage points.

Compared against 366 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

Insights: Port Angeles, WA metro. Aggregated EPA AQS monitors across this Core-Based Statistical Area logged a median Air Quality Index of 29 over 365 measured days in 2025, which corresponds to a Good band and a Good metro-wide health grade. The monitored-day split lands at 312 Good days (85%), 53 Moderate (15%), and 0 Unhealthy-for-Sensitive-Groups (0%). The 90th-percentile AQI finished at 53 while the highest single-day reading hit 69 (Moderate). Metro residents averaged roughly 25.6 clean-air days per 30-day window across the reporting year.

Across the 2020–2025 trend window, the share of monitored days rated Good shifted by +1.0 points and the median AQI moved -8 points, which classifies the multi-year trajectory as improving. The metro recorded no Unhealthy-tier days in this annual dataset. Metros with comparable AQI profiles include Urban Honolulu, HI (97.3% good, AQI 29); Butte-Silver Bow, MT (84.9% good, AQI 28); Cookeville, TN (90.0% good, AQI 30).

Air Quality Summary

Median AQI

29

Good

Good Days

85.5%

312 of 365 days

Max AQI

69

Moderate

Health Grade

Good

90th pct: 53

AQI Day Breakdown (2025)

Distribution of 365 monitored days across EPA AQI categories.

Good

312

85%

Moderate

53

15%

USG

0

0%

Unhealthy

0

0%

Very Unhealthy

0

0%

Hazardous

0

0%

Health Impact Assessment

Good

The Port Angeles, WA metro area's air quality is rated Good based on 85.5% 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 Port Angeles, WA metro compare?

How Port Angeles, WA compares

Good-day share better than typical
Port Angeles, WA 85.5%
Urban Honolulu, HI 97.3%
Typical US metro 70.6%
Median AQI better than typical
Port Angeles, WA 29
Urban Honolulu, HI 29
Typical US metro 41
Unhealthy days / yr better than typical
Port Angeles, WA 0
Urban Honolulu, HI 0
Typical US metro 1

5-Year Air Quality Trend

Air quality is improving in the Port Angeles, WA metro. Highest Good-day share: 2024 (87.7%, 321 of 366 monitored days).

Year Good Moderate Unhealthy Median AQI
2020 304 55 1 37
2021 298 67 0 37
2022 272 91 0 38
2023 307 57 0 37
2024 321 45 0 36
2025 312 53 0 29

Metros with a similar median AQI

CBSA peers nationwide whose annual median AQI sits near Port Angeles, WA (29).

Urban Honolulu, HI

Median AQI 29 · 97.3% Good-day share

29

Butte-Silver Bow, MT

Median AQI 28 · 84.9% Good-day share

28

Cookeville, TN

Median AQI 30 · 90.0% Good-day share

30

Dodge City, KS

Median AQI 28 · 89.8% Good-day share

28

Lynchburg, VA

Median AQI 30 · 85.2% Good-day share

30

Moses Lake, WA

Median AQI 28 · 79.7% Good-day share

28

Metros with similar unhealthy-day exposure

A second relationship type: metros whose unhealthy-or-worse day count is closest to Port Angeles, WA'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

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 Port Angeles, WA metro area? ▼
The Port Angeles, WA metro area has a median Air Quality Index (AQI) of 29, rated "Good." 85.5% of monitored days (312 out of 365) had good air quality in 2025.
How many unhealthy air days does Port Angeles, WA have? ▼
In 2025, the Port Angeles, WA metro area recorded 0 unhealthy air days (0 Unhealthy, 0 Very Unhealthy, 0 Hazardous). The maximum AQI reached 69.
Is air quality in Port Angeles, WA getting better or worse? ▼
Air quality in the Port Angeles, WA 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: 2024 at 87.7% (321 of 366 days). Lowest qualifying Good-day share: 2022 at 74.9% (272 of 363 days).
What does AQI 29 mean for health? ▼
An AQI of 29 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 Port Angeles, WA? ▼
The 90th percentile AQI for the Port Angeles, WA metro area is 53, meaning 90% of monitored days had an AQI at or below this level. The maximum AQI recorded was 69 (Moderate).
How does Port Angeles, WA compare to other metro areas? ▼
The Port Angeles, WA metro has 85.5% good air days. Similar metros: Urban Honolulu, HI (97.3% good), Butte-Silver Bow, MT (84.9% good), Cookeville, TN (90.0% 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

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Every figure on PlainAirData 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.