SmogRank / Bellevue / Kirkland
Bellevue vs Kirkland: PM2.5 compared
Over the last year, Kirkland's air was 11% more polluted than Bellevue's: PM2.5 averaged 4.2 µg/m³ against 3.8, on the 283 days both cities were measured. Kirkland had the dirtier air on 109 of those days, Bellevue on 165. Kirkland was over the WHO's daily guideline of 15 µg/m³ on 10 of them, Bellevue on 4.
Right now
The last year, day by day
Month by month
Year by year
| Year | Bellevue | Kirkland | Days Bellevue was worse |
|---|---|---|---|
| 2026 so far | 23 | 24 | 127 |
| 2025 | 23 | 32 | 58 |
Means in US AQI over the days both cities were measured that year; a year shows once they share 30 such days.
Each city's worst days
Bellevue
- 5 Aug 202610838.3 µg/m³
- 6 Aug 202610436.9 µg/m³
- 4 Aug 20268326.2 µg/m³
Kirkland
- 5 Aug 202615256.7 µg/m³
- 6 Aug 202614252.2 µg/m³
- 4 Aug 202612846.5 µg/m³
Daily means in US AQI, with µg/m³ beside them, since the index stops at its top value, over the days both cities were measured in the last year. Each date opens that day's world board.
Compare either city with another
Bellevue
Side by side with Columbia City (the nearest), Mecca (United States's worst on 30 days), Gujranwala (the world's worst on 30 days).
Kirkland
Side by side with Mecca (United States's worst on 30 days), Gujranwala (the world's worst on 30 days).
Use this page
SmogRank, PM2.5 daily means compared, Bellevue and Kirkland, 8 Oct 2025 – 7 Oct 2026, smogrank.com/compare/us-bellevue/us-kirkland (accessed 8 Oct 2026).
You're welcome to reuse a single chart, image or figure with this citation and a link. Terms. Raw monitor readings in bulk are published by OpenAQ, under each provider's licence.
The same rules as every SmogRank figure: reference monitors first, and a day counts with 18 measured hours. How we measure.
Updated 2026-10-08 20:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the US AQI PM2.5 sub-index. Some readings: Uzhydromet (Uzbekistan's Hydrometeorological Service); Department of Environment, Nepal; Vietnam's government monitors; Aurassure; Umhverfisstofnun (Environment Agency of Iceland); Love My Air (City and County of Denver), no reuse terms published (why we use them).