Metro area air quality · 2025

Crescent City, CA

Median AQI 32 (Good). 81.8% of monitored days rated Good across this metro's EPA monitoring network.

32
Median AQI
81.8%
Good-air days
0
Unhealthy days
71%
Cleaner than US metros

Crescent City, CA posted a 2025 median AQI of 32 (Good) with 81.8% Good days

According to the U.S. EPA Air Quality System, the Crescent City, CA CBSA recorded a median AQI of 32 across 352 monitored days in 2025, with 81.8% 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 Crescent City, CA CBSA's 81.8% Good-day share places it cleaner than 71% of US metros in 2025.
Closest median-AQI peer
Hilo, HI (86.0% Good, median AQI 32) is the closest nationwide median-AQI peer to Crescent City, CA.
2020–2025 Good-day shift
Crescent City, CA's Good-day share moved +14.3 points from 2020 to 2025 (median AQI -10).
Median AQI
Median AQI: 32

Aggregated from EPA Air Quality System (2025), 352 monitored days. EPA AQS →

The verdict

Crescent City, CA sits in the upper Good-day tercile among EPA CBSA metros on this site (81.8% of 352 monitored days). On the EPA scale the metro runs good, cleaner than the median US metro, with a median AQI of 32 and 81.8% of 352 monitored days in the Good band.

32
median AQI · Good
81.8%
days rated Good
71%
cleaner than US metros
70
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
  • Crescent City, CA metro's peak single-day AQI fell from 125 to 70 between the 2024 and 2025 EPA annual releases, a change of -55 points.

Compared against 287 monitored days in 2024 and 352 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

Crescent City, CA sits in the upper Good-day tercile among EPA CBSA metros on this site (81.8% of 352 monitored days). Signature read: 81.8% 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 32 over 352 measured days in 2025 (Good / Good). The monitored-day split lands at 288 Good (82%), 64 Moderate (18%), and 0 Unhealthy-for-Sensitive-Groups (0%). The 90th-percentile AQI finished at 54; the highest single-day reading hit 70 (Moderate).

Across 2020–2025, Good-day share shifted +14.3 points and median AQI moved -10 (improving). No Unhealthy-tier days appear in this annual dataset. Metros with comparable AQI profiles include Hilo, HI (86.0% good, AQI 32); Laconia, NH (88.8% good, AQI 32); Athens, OH (83.4% good, AQI 31).

Best and worst city air quality →

Air Quality Summary

Median AQI

32

Good

Good Days

81.8%

288 of 352 days

Max AQI

70

Moderate

Health Grade

Good

90th pct: 54

AQI Day Breakdown (2025)

Distribution of 352 monitored days across EPA AQI categories.

Good

288

82%

Moderate

64

18%

USG

0

0%

Unhealthy

0

0%

Very Unhealthy

0

0%

Hazardous

0

0%

Health Impact Assessment

Good

The Crescent City, CA metro area's air quality is rated Good based on 81.8% 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 Crescent City, CA metro compare?

How Crescent City, CA compares

Good-day share better than typical
Crescent City, CA 81.8%
Hilo, HI 86.0%
Typical US metro 70.6%
Median AQI better than typical
Crescent City, CA 32
Hilo, HI 32
Typical US metro 41
Unhealthy days / yr better than typical
Crescent City, CA 0
Hilo, HI 0
Typical US metro 1

5-Year Air Quality Trend

Air quality is improving in the Crescent City, CA metro. Highest Good-day share: 2022 (86.9%, 299 of 344 monitored days).

Year Good Moderate Unhealthy Median AQI
2020 193 90 3 42
2021 259 64 0 31
2022 299 45 0 29
2023 268 52 2 32
2024 232 55 0 32
2025 288 64 0 32

Metros with a similar median AQI

CBSA peers nationwide whose annual median AQI sits near Crescent City, CA (32).

Hilo, HI

Median AQI 32 · 86.0% Good-day share

32

Laconia, NH

Median AQI 32 · 88.8% Good-day share

32

Athens, OH

Median AQI 31 · 83.4% Good-day share

31

Bangor, ME

Median AQI 33 · 84.2% Good-day share

33

Bellingham, WA

Median AQI 31 · 94.0% Good-day share

31

Clarksburg, WV

Median AQI 33 · 72.4% Good-day share

33

Metros with similar unhealthy-day exposure

A second relationship type: metros whose unhealthy-or-worse day count is closest to Crescent City, CA'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

How many unhealthy air days does Crescent City, CA have? ▼
In 2025, the Crescent City, CA metro area recorded 0 unhealthy air days (0 Unhealthy, 0 Very Unhealthy, 0 Hazardous). The maximum AQI reached 70.
What is the air quality in the Crescent City, CA metro area? ▼
The Crescent City, CA metro area has a median Air Quality Index (AQI) of 32, rated "Good." 81.8% of monitored days (288 out of 352) had good air quality in 2025.
Is air quality in Crescent City, CA getting better or worse? ▼
Air quality in the Crescent City, CA 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: 2022 at 86.9% (299 of 344 days). Lowest qualifying Good-day share: 2020 at 67.5% (193 of 286 days).
What does AQI 32 mean for health? ▼
An AQI of 32 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 Crescent City, CA compare to other metro areas? ▼
The Crescent City, CA metro has 81.8% good air days. Similar metros: Hilo, HI (86.0% good), Laconia, NH (88.8% good), Athens, OH (83.4% good).
What is the 90th percentile AQI for Crescent City, CA? ▼
The 90th percentile AQI for the Crescent City, CA metro area is 54, meaning 90% of monitored days had an AQI at or below this level. The maximum AQI recorded was 70 (Moderate).

Data Sources

Primary Source: U.S. Environmental Protection Agency (EPA), Air Quality System (AQS), Annual AQI by CBSA dataset for Crescent City, CA, 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, Crescent City, CA · 2020–2025