Metro area air quality · 2024

Bremerton-Silverdale, WA

Median AQI 19 (Good). 97.2% of monitored days rated Good across this metro's EPA monitoring network.

19
Median AQI
97.2%
Good-air days
0
Unhealthy days
96%
Cleaner than US metros

Aggregated from EPA Air Quality System (2024), 351 monitored days. EPA AQS → · NOAA →

Insights: Bremerton-Silverdale, WA metro. Aggregated EPA AQS monitors across this Core-Based Statistical Area logged a median Air Quality Index of 19 over 351 measured days in 2024, which corresponds to a Good band and a Excellent metro-wide health grade. The monitored-day split lands at 341 Good days (97%), 10 Moderate (3%), and 0 Unhealthy-for-Sensitive-Groups (0%). The 90th-percentile AQI finished at 38 while the highest single-day reading hit 69 (Moderate). Metro residents averaged roughly 29.1 clean-air days per 30-day window across the reporting year.

Across the 2020–2024 trend window, good days shifted by +19 and the median AQI moved -4 points, which classifies the multi-year trajectory as improving. The metro avoided any Unhealthy-tier days entirely, an outcome that typically reflects favorable wind patterns, lower industrial density, or effective regional emission controls. Metros with comparable AQI profiles include Hailey, ID (86.3% good, AQI 19); Lake Havasu City-Kingman, AZ (98.6% good, AQI 19); Marquette, MI (90.2% good, AQI 19).

Air Quality Summary

Median AQI

19

Good

Good Days

97.2%

341 of 351 days

Max AQI

69

Moderate

Health Grade

Excellent

90th pct: 38

AQI Day Breakdown (2024)

Distribution of 351 monitored days across EPA AQI categories.

Good

341

97%

Moderate

10

3%

USG

0

0%

Unhealthy

0

0%

Very Unhealthy

0

0%

Hazardous

0

0%

Health Impact Assessment

Excellent

The Bremerton-Silverdale, WA metro area's air quality is rated Excellent based on 97.2% good air days. No unhealthy air days were recorded in 2024.

Air quality is generally acceptable. Unusually sensitive people should monitor real-time conditions at AirNow.gov during high-pollution events.

How does the Bremerton-Silverdale, WA metro compare?

How Bremerton-Silverdale, WA compares

Good-day share better than US avg
Bremerton-Silverdale, WA 97.2%
Hailey, ID 86.3%
US average 70.2%
Median AQI better than US avg
Bremerton-Silverdale, WA 19
Hailey, ID 19
US average 41
Unhealthy days / yr better than US avg
Bremerton-Silverdale, WA 0
Hailey, ID 2
US average 1

5-Year Air Quality Trend

Air quality is improving in the Bremerton-Silverdale, WA metro. Best year: 2021 (342 good days).

Year Good Moderate Unhealthy Median AQI
2020 322 30 1 23
2021 342 16 0 26
2022 306 50 0 28
2023 323 25 0 22
2024 341 10 0 19

Metros with Similar Air Quality

Metro areas across the US with a similar median AQI to Bremerton-Silverdale, WA.

Hailey, ID

AQI 19 · 86.3% good

19

Lake Havasu City-Kingman, AZ

AQI 19 · 98.6% good

19

Marquette, MI

AQI 19 · 90.2% good

19

Santa Rosa, CA

AQI 19 · 95.1% good

19

Aberdeen, WA

AQI 20 · 96.5% good

20

Bozeman, MT

AQI 18 · 90.1% good

18

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Health Effects of Air Pollution

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Frequently Asked Questions

What is the air quality in the Bremerton-Silverdale, WA metro area? ▼
The Bremerton-Silverdale, WA metro area has a median Air Quality Index (AQI) of 19, rated "Good." 97.2% of monitored days (341 out of 351) had good air quality in 2024.
How many unhealthy air days does Bremerton-Silverdale, WA have? ▼
In 2024, the Bremerton-Silverdale, WA metro area recorded 0 unhealthy air days (0 Unhealthy, 0 Very Unhealthy, 0 Hazardous). The maximum AQI reached 69.
Is air quality in Bremerton-Silverdale, WA getting better or worse? ▼
Air quality in the Bremerton-Silverdale, WA metro is improving based on 5-year trends (2020-2024). Best year: 2021 with 342 good days. Worst year: 2022 with 306 good days.
What does AQI 19 mean for health? ▼
An AQI of 19 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 Bremerton-Silverdale, WA? ▼
The 90th percentile AQI for the Bremerton-Silverdale, WA metro area is 38, meaning 90% of monitored days had an AQI at or below this level. The maximum AQI recorded was 69 (Moderate).
How does Bremerton-Silverdale, WA compare to other metro areas? ▼
The Bremerton-Silverdale, WA metro has 97.2% good air days. Similar metros: Hailey, ID (86.3% good), Lake Havasu City-Kingman, AZ (98.6% good), Marquette, MI (90.2% good).

Data Sources

Primary Source: U.S. Environmental Protection Agency (EPA), Air Quality System (AQS), Annual AQI by CBSA dataset, 2020–2024. The AQS collects ambient air monitoring data from state, local, and tribal monitoring agencies across the United States.

Metrics: Air Quality Index (AQI) is calculated using EPA-standard breakpoints for six criteria pollutants: PM2.5, PM10, Ozone, NO2, CO, and SO2. Median AQI, max AQI, and 90th percentile AQI are computed from daily measurements. Good days percentage reflects days with AQI 0–50.

Coverage: 501 metro areas (Core Based Statistical Areas). Only metros with active monitoring stations are included. Unmonitored areas are not represented.

Read our methodology , how this data is sourced, computed, and verified.

Source: U.S. EPA, AirNow / AQS Air Quality Index readings and pollutant concentrations · 2025