Sultan, Washington Air Quality
Sultan has a median AQI of 41, earning an air quality grade of A- — excellent air quality that ranks better than 50% of US cities. Air quality has been trending worse over the past decade, a concern for local residents and health officials. Particulate matter (PM2.5) is the primary concern, often linked to vehicle traffic, industrial activity, and wildfire smoke. In 2025, Sultan recorded 168 good air quality days (69% of monitored days).
Population: 6,116 • County: Snohomish
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Quick Facts
| Current AQI | 17 — Good |
| Air Quality Grade | A- |
| Median AQI (2025) | 41 |
| vs. U.S. Cities | Better than 50% |
| Primary Pollutant | PM2.5 |
| Unhealthy Days/Year | 0 |
| 10-Year Trend | ↓ Worsening |
| Data Source | EPA AirNow |
Health Recommendation
Air quality is satisfactory, and air pollution poses little or no risk.
It's a great day to be active outside!
5-Day AQI Forecast
Last 30 Days
Current Pollutant Levels
Real-time data from EPA AirNow
AQI Trend (10 Years)
Air Quality Days by Year
2025 Air Quality Summary
Primary Pollutant Days (2025)
Days when each pollutant was the primary driver of AQI. Learn about pollutants →
Frequently Asked Questions About Sultan Air Quality
What is the air quality in Sultan today?
The current AQI in Sultan is 17, which is rated "Good". Air quality is satisfactory, and air pollution poses little or no risk.
Is air quality in Sultan getting better or worse?
Air quality in Sultan has been worsening in recent years. The median AQI rose from 32 in 2016 to 41 in 2025.
What is the most common air pollutant in Sultan?
PM2.5 is the primary air pollutant in Sultan, responsible for the most air quality-impacted days in 2025. Particulate matter can originate from vehicle exhaust, wildfires, and industrial emissions.
How many unhealthy air days does Sultan have per year?
In 2025, Sultan had 0 days when air quality was unhealthy or unhealthy for sensitive groups (AQI above 100). There were 168 good days and 75 moderate days out of 243 days monitored.
What air quality grade does Sultan receive?
Sultan receives an air quality grade of A-, placing it better than 50% of US cities. This grade is based on a median AQI of 41 for 2025, derived from EPA monitoring data.
Air Quality Grade
Better than 50% of US cities
Nearby Cities
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National Rankings
See how Sultan compares to every other US city by air quality.
Best Air Quality Cities →All city rankingsRecommended Air Purifiers for Sultan
Based on your area's air quality (median AQI: 41), we recommend these air purifiers to help protect your health indoors.
RabbitAir MinusA2
Stylish wall-mountable design with customizable artwork panels.
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Other Great Options
Molekule Air Pro
Commercial-grade with patented PECO technology for destroying pollutants.
Blueair Blue Pure 211+
High performance for large rooms with simple operation.
Dyson Pure Cool TP04
Premium all-in-one air purifier and fan with advanced features.
Not sure which air purifier is right for you?
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Read our complete buying guide →