Metro area air quality · 2025
Sacramento--Roseville--Arden-Arcade, CA
Median AQI 55 (Moderate). 35.3% of monitored days rated Good across this metro's EPA monitoring network.
- 55
- Median AQI
- 35.3%
- Good-air days
- 0
- Unhealthy days
- 5%
- Cleaner than US metros
Sacramento--Roseville--Arden-Arcade, CA posted a 2025 median AQI of 55 (Moderate) with 35.3% Good days
According to the U.S. EPA Air Quality System, the Sacramento--Roseville--Arden-Arcade, CA CBSA recorded a median AQI of 55 across 365 monitored days in 2025, with 35.3% 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 Sacramento--Roseville--Arden-Arcade, CA CBSA's 35.3% Good-day share places it cleaner than 5% of US metros in 2025.
- Closest median-AQI peer
- Bishop, CA (37.3% Good, median AQI 55) is the closest nationwide median-AQI peer to Sacramento--Roseville--Arden-Arcade, CA.
- 2020–2025 Good-day shift
- Sacramento--Roseville--Arden-Arcade, CA's Good-day share moved +5.3 points from 2020 to 2025 (median AQI -8).
- Median AQI
- Median AQI: 55
Aggregated from EPA Air Quality System (2025), 365 monitored days. EPA AQS →
The verdict
The Sacramento--Roseville--Arden-Arcade, CA metro runs moderate on the EPA scale, among the more polluted US metros, a median AQI of 55 with 35.3% of 365 monitored days in the Good band.
- 55
- median AQI · Moderate
- 35.3%
- days rated Good
- 5%
- cleaner than US metros
- 143
- 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
- Sacramento--Roseville--Arden-Arcade, CA metro's Good-day share fell from 37.8% to 35.8% between the 2024 and 2025 EPA annual releases, a change of -1.9 percentage points.
Insights: Sacramento--Roseville--Arden-Arcade, CA metro. Aggregated EPA AQS monitors across this Core-Based Statistical Area logged a median Air Quality Index of 55 over 365 measured days in 2025, which corresponds to a Moderate band and a Poor metro-wide health grade. The monitored-day split lands at 129 Good days (35%), 231 Moderate (63%), and 5 Unhealthy-for-Sensitive-Groups (1%). The 90th-percentile AQI finished at 77 while the highest single-day reading hit 143 (USG). Metro residents averaged roughly 10.6 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 +5.3 points (measured against 337 monitored days in 2020 and 360 in 2025, so raw day counts are not comparable) 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 Bishop, CA (37.3% good, AQI 55); Little Rock-North Little Rock-Conway, AR (31.2% good, AQI 55); Baton Rouge, LA (35.6% good, AQI 54).
Air Quality Summary
Median AQI
55
Moderate
Good Days
35.3%
129 of 365 days
Max AQI
143
USG
Health Grade
Poor
90th pct: 77
AQI Day Breakdown (2025)
Distribution of 365 monitored days across EPA AQI categories.
Good
129
35%
Moderate
231
63%
USG
5
1%
Unhealthy
0
0%
Very Unhealthy
0
0%
Hazardous
0
0%
Health Impact Assessment
The Sacramento--Roseville--Arden-Arcade, CA metro area's air quality is rated Poor based on 35.3% 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 Sacramento--Roseville--Arden-Arcade, CA metro compare?
How Sacramento--Roseville--Arden-Arcade, CA compares
5-Year Air Quality Trend
Air quality is improving in the Sacramento--Roseville--Arden-Arcade, CA metro. Highest Good-day share: 2024 (37.8%, 125 of 331 monitored days).
| Year | Good | Moderate | Unhealthy | Median AQI | Max AQI |
|---|---|---|---|---|---|
| 2020 | 103 | 213 | 21 | 63 | 247 |
| 2021 | 97 | 210 | 10 | 64 | 692 |
| 2022 | 115 | 209 | 4 | 61 | 442 |
| 2023 | 129 | 222 | 0 | 58 | 143 |
| 2024 | 125 | 206 | 0 | 55 | 140 |
| 2025 | 129 | 231 | 0 | 55 | 143 |
Metros with a similar median AQI
CBSA peers nationwide whose annual median AQI sits near Sacramento--Roseville--Arden-Arcade, CA (55).
Bishop, CA
Median AQI 55 · 37.3% Good-day share
Little Rock-North Little Rock-Conway, AR
Median AQI 55 · 31.2% Good-day share
Baton Rouge, LA
Median AQI 54 · 35.6% Good-day share
Chicago-Naperville-Elgin, IL-IN-WI
Median AQI 56 · 29.9% Good-day share
Cincinnati, OH-KY-IN
Median AQI 56 · 26.0% Good-day share
Cleveland-Elyria, OH
Median AQI 54 · 42.5% Good-day share
Metros with similar unhealthy-day exposure
A second relationship type: metros whose unhealthy-or-worse day count is closest to Sacramento--Roseville--Arden-Arcade, 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 Sacramento--Roseville--Arden-Arcade, CA metro area? ▼
How many unhealthy air days does Sacramento--Roseville--Arden-Arcade, CA have? ▼
Is air quality in Sacramento--Roseville--Arden-Arcade, CA getting better or worse? ▼
What does AQI 55 mean for health? ▼
What is the 90th percentile AQI for Sacramento--Roseville--Arden-Arcade, CA? ▼
How does Sacramento--Roseville--Arden-Arcade, 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
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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.