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
The Crescent City, CA metro runs good on the EPA scale, cleaner than the median US metro, a median AQI of 32 with 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
- 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.
Insights: Crescent City, CA metro. Aggregated EPA AQS monitors across this Core-Based Statistical Area logged a median Air Quality Index of 32 over 352 measured days in 2025, which corresponds to a Good band and a Good metro-wide health grade. The monitored-day split lands at 288 Good days (82%), 64 Moderate (18%), and 0 Unhealthy-for-Sensitive-Groups (0%). The 90th-percentile AQI finished at 54 while the highest single-day reading hit 70 (Moderate). Metro residents averaged roughly 24.5 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 +14.3 points (measured against 286 monitored days in 2020 and 352 in 2025, so raw day counts are not comparable) and the median AQI moved -10 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 Hilo, HI (86.0% good, AQI 32); Laconia, NH (88.8% good, AQI 32); Athens, OH (83.4% good, AQI 31).
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
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
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 | Max AQI |
|---|---|---|---|---|---|
| 2020 | 193 | 90 | 3 | 42 | 245 |
| 2021 | 259 | 64 | 0 | 31 | 72 |
| 2022 | 299 | 45 | 0 | 29 | 74 |
| 2023 | 268 | 52 | 2 | 32 | 187 |
| 2024 | 232 | 55 | 0 | 32 | 125 |
| 2025 | 288 | 64 | 0 | 32 | 70 |
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
Laconia, NH
Median AQI 32 · 88.8% Good-day share
Athens, OH
Median AQI 31 · 83.4% Good-day share
Bangor, ME
Median AQI 33 · 84.2% Good-day share
Bellingham, WA
Median AQI 31 · 94.0% Good-day share
Clarksburg, WV
Median AQI 33 · 72.4% Good-day share
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
Aberdeen, WA
0 unhealthy-or-worse days · median AQI 22
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
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 Crescent City, CA metro area? ▼
How many unhealthy air days does Crescent City, CA have? ▼
Is air quality in Crescent City, CA getting better or worse? ▼
What does AQI 32 mean for health? ▼
What is the 90th percentile AQI for Crescent City, CA? ▼
How does Crescent City, CA compare to other metro areas? ▼
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
Share this annual record
Send the source-year summary or download its ready-to-use data card.
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.