Rio Claro vs São Sebastião: PM2.5 compared

Rio Claro and São Sebastião, São Paulo were both measured on only 9 days over the last year, too few to compare them (it takes 30).

Right now

Rio Claro#422on the 24-hour board of 2,702, at 59 US AQI (13.2 µg/m³)

São Sebastião#2,403on the 24-hour board of 2,702, at 15 US AQI (2.7 µg/m³)

Side by side with Limeira (the nearest), Nilópolis (Brazil's 2nd worst on 30 days), Gujranwala (the world's worst on 30 days).

Side by side with São José dos Campos (the nearest), Gujranwala (the world's worst on 30 days).

The same rules as every SmogRank figure: reference monitors first, and a day counts with 18 measured hours. How we measure.

Updated 2026-10-12 19:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the US AQI PM2.5 sub-index.