Bothell, 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.
Bothell, WA air quality summary: Bothell, WA, holds an impressive clean air score of 85.4 and an A grade, with an annual PM2.5 mean of 5.7. This reflects a very favorable air quality environment for the city over the long term. In Bothell, the annual PM2.5 mean is 5.7, which is considered moderate or acceptable but still relevant for long-term exposure. Long-term air quality in Bothell has been improving over recent years.
Clean Air Score
The clean air score of 85.4 and A grade indicate that Bothell maintains high air quality standards. These ratings signify that long-term particulate levels are well within the ranges considered optimal for residential environments.
🏡 What This Means for Buying
Air quality is a positive factor to consider when evaluating long-term housing or relocation in Bothell. An A grade suggests that the local environment is a strong point for those focused on high environmental quality.
Indoor Air Quality in Bothell, 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 Bothell.
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 Bothell:
- 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 Bothell Homes:
🩺 My Health Risk Assessment
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Health Advice
Enjoy the outdoors! Air quality is great.
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</> Create Free Widget🏡 Property Value Impact Analysis
Between 2019 and 2024, Bothell'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 Bothell 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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Bothell Air Quality FAQs
Is Bothell a good fit for people who care about long-term air quality?
Bothell holds a clean air score of 85.4 and an A grade, with an annual PM2.5 mean of 5.7. These metrics indicate a high-quality environment for those who prioritize long-term air quality.
What is the frequency of unhealthy air or long-term pollution exposure in Bothell?
Bothell reports 0% unhealthy air days based on available data. This, along with its A grade, suggests that significant particulate spikes are rare in the city.
Is air quality in Bothell improving or getting worse over time?
The trend for air quality in Bothell has been improving in recent years. This reflects a positive trajectory for particulate concentrations over the analyzed period.
Does air quality vary within the city of Bothell?
Air quality in Bothell can vary due to factors such as local traffic density, industrial activity, and geography. While the overall city grade is excellent, localized conditions near major roads or specific particulate sources may differ slightly.