City of Sammamish, WA
Long-term air quality
What this page tells you
This page combines annual PM2.5, unhealthy days, 5-year trend, and data coverage so you can compare long-term air quality, not just today's reading.
City of Sammamish, WA air quality summary: City of Sammamish, WA holds a CleanAirData score of 95.1, resulting in a grade of A. The city's annual average PM2.5 concentration is 3.4 µg/m³. City of Sammamish records an annual mean PM2.5 concentration of 3.4 µg/m³. Long-term air quality in City of Sammamish is described as improving over recent years.
Clean Air Score
The clean air score of 95.1 and grade of A reflect long-term air quality conditions in City of Sammamish. These metrics provide a baseline for understanding the chronic pollution levels residents may encounter over several years.
🏡 What This Means for Buying
Air quality should be treated as one factor in a broader relocation or housing decision in City of Sammamish. Prospective residents may wish to consider the relatively low long-term particulate exposure indicated by the data.
Indoor Air Quality in City of Sammamish, WA
Outdoor pollution can still affect indoor air when windows are open, filtration is weak, or wildfire smoke moves in.
How to react when today's AQI changes
Use the AQI bands below to decide whether to open windows, run an air purifier, or stay indoors when pollution spikes in City of Sammamish.
AQI 0-50
GoodOpen windows: Open windows if you want fresh air.
Air purifier: No purifier needed for most homes.
Indoor activity: Normal indoor activity is fine.
AQI 51-100
ModerateOpen windows: Sensitive groups should limit open-window time.
Air purifier: Use fans or filtration if dust or pollen is bothering you.
Indoor activity: Most people can stay active indoors.
AQI 101-150
Unhealthy for Sensitive GroupsOpen windows: Keep windows closed.
Air purifier: Run a HEPA purifier in the main room and bedroom.
Indoor activity: Sensitive groups should reduce outdoor exposure.
AQI 151+
UnhealthyOpen windows: Keep windows and doors closed.
Air purifier: Run HEPA continuously and seal obvious drafts.
Indoor activity: Stay indoors as much as possible; use an N95 if you must go out.
Common indoor air concerns in City of Sammamish:
- Wildfire smoke infiltration (PM2.5)
- Seasonal pollen and dust mite allergens
- VOCs from household products
Recommended action: If today's AQI reaches 101 or higher, close windows and run HEPA filtration before indoor air starts to feel smoky or stale.
Top Products for City of Sammamish Homes:
🩺 My Health Risk Assessment
See how City of Sammamish's air quality affects you and your family specifically.
Health Advice
Enjoy the outdoors! Air quality is great.
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</> Create Free Widget🏡 Property Value Impact Analysis
Between 2019 and 2024, City of Sammamish's air quality improved by 1.2 μg/m³. Based on NBER studies, this change correlates with a estimated 4.8% increase in relative property value retention.
Cleaner Alternatives in WA
Why City of Sammamish earned a 85.4
Raw inputs, scoring weights, and data coverage for this city.
Best Time to Run
Find the cleanest hours for your run today.
Cycling Forecast
Avoid pollution spikes on your next ride.
📅 Past 30 Days Trend
Real-time daily PM2.5 AQI
🌸 Pollen Outlook
Current Seasonal Forecast
How it worksBased on current seasonal forecast data. Not a long-term pollution rating or relocation score.
Score Breakdown
| Component | Weight | Score Contribution |
|---|---|---|
| Annual Air Quality | 40% | 89.7 |
| Unhealthy Days | 25% | 100 |
| 5-Year Trend | 20% | 56 |
| Seasonal Variability | 10% | 95.5 |
| Extreme Events | 5% | 100 |
Explore More Air Quality Data
Frequently Asked Questions
About This Data
Data Sources
Historical air quality mapping and scoring are based completely on official U.S. Environmental Protection Agency (EPA) AirNow API data. 5-day AQI forecasts are provided by WAQI.
Methodology
Our Clean Air Score (0-100) is a proprietary algorithm that weighs multiple factors:
- Annual PM2.5 averages (40%)
- Frequency of unhealthy days (25%)
- 5-year pollution trends (20%)
- Seasonal variability and extreme events (15%)
Updates & Accuracy
Real-time data is updated hourly. Historical aggregate scores are recalculated monthly to reflect the latest trends. While we strive for accuracy, sensor maintenance and local conditions can affect individual readings.
Practical Advice
When AQI > 100: Sensitive groups (children, elderly, asthmatics) should limit prolonged outdoor exertion.
When AQI > 150: Everyone should avoid outdoor exercise and keep windows closed.
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City of Sammamish Air Quality FAQs
Is City of Sammamish a good fit for people who care about long-term air quality?
City of Sammamish has a clean air score of 95.1 and a grade of A. The annual PM2.5 concentration is 3.4 µg/m³, which represents relatively low long-term particulate exposure.
How frequent is unhealthy air in City of Sammamish?
In City of Sammamish, approximately 0% of days are classified as having unhealthy air levels. This frequency contributes to the city's overall grade of A and its average PM2.5 concentration of 3.4 µg/m³.
Is the air quality in City of Sammamish improving or getting worse over time?
The long-term air quality trend in City of Sammamish is improving over recent years.
Does air quality vary across different parts of City of Sammamish?
Air quality can vary within City of Sammamish due to local factors such as traffic patterns, industrial activity, and specific geographic locations.