SmogRank / Encinitas / Oceanside
Encinitas vs Oceanside: PM2.5 compared
Over the last year, Oceanside's air was about 2.0× as polluted as Encinitas's: PM2.5 averaged 9.7 µg/m³ against 4.9, on the 197 days both cities were measured. Oceanside had the dirtier air on 183 of those days, Encinitas on 12. Oceanside was over the WHO's daily guideline of 15 µg/m³ on 12 of them, Encinitas on 11.
Right now
The last year, day by day
Month by month
Each city's worst days
Encinitas
- 17 May 20268024.7 µg/m³
- 20 May 20267622.4 µg/m³
- 28 Mar 20267019.4 µg/m³
Oceanside
- 8 Sept 20269834.1 µg/m³
- 7 Sept 20269633.2 µg/m³
- 17 May 20268527.6 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
Encinitas
Side by side with Mecca (United States's worst on 30 days), Gujranwala (the world's worst on 30 days).
Oceanside
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, Encinitas and Oceanside, 8 Oct 2025 – 7 Oct 2026, smogrank.com/compare/us-encinitas/us-oceanside (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).