SmogRank / Bothell / Shoreline
Bothell vs Shoreline: PM2.5 compared
Over the last year, Shoreline's air was about 1.6× as polluted as Bothell's: PM2.5 averaged 5.7 µg/m³ against 3.5, on the 284 days both cities were measured. Shoreline had the dirtier air on 262 of those days, Bothell on 21. Shoreline was over the WHO's daily guideline of 15 µg/m³ on 9 of them, Bothell on 9.
Right now
The last year, day by day
Month by month
Year by year
| Year | Bothell | Shoreline | Days Bothell was worse |
|---|---|---|---|
| 2026 so far | 21 | 31 | 20 |
| 2025 | 16 | 33 | 2 |
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
Bothell
- 5 Aug 202614051.5 µg/m³
- 6 Aug 202613649.7 µg/m³
- 4 Aug 20269733.7 µg/m³
Shoreline
- 6 Aug 20269432.2 µg/m³
- 5 Aug 20268829.0 µg/m³
- 4 Aug 20267521.9 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
Bothell
Side by side with North Creek (the nearest), Mecca (United States's worst on 30 days), Gujranwala (the world's worst on 30 days).
Shoreline
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, Bothell and Shoreline, 8 Oct 2025 – 7 Oct 2026, smogrank.com/compare/us-bothell/us-shoreline (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).