SmogRank / Ferraz de Vasconcelos / Rio Claro
Ferraz de Vasconcelos vs Rio Claro: PM2.5 compared
Over the last year, Rio Claro's air was 13% more polluted than Ferraz de Vasconcelos's: PM2.5 averaged 14.3 µg/m³ against 12.7, on the 328 days both cities were measured. Rio Claro had the dirtier air on 212 of those days, Ferraz de Vasconcelos on 114. Rio Claro was over the WHO's daily guideline of 15 µg/m³ on 118 of them, Ferraz de Vasconcelos on 93.
Right now
The last year, day by day
Month by month
Year by year
| Year | Ferraz de Vasconcelos | Rio Claro | Days Ferraz de Vasconcelos was worse |
|---|---|---|---|
| 2026 so far | 58 | 62 | 78 |
| 2025 | 60 | 64 | 111 |
| 2024 | 68 | 72 | 111 |
| 2023 | 64 | 66 | 108 |
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
Ferraz de Vasconcelos
- 9 Jun 202610938.6 µg/m³
- 10 Jun 202610537.0 µg/m³
- 4 Aug 202610236.1 µg/m³
Rio Claro
- 13 Aug 202611440.6 µg/m³
- 14 Aug 202610838.5 µg/m³
- 19 Aug 202610135.6 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
Ferraz de Vasconcelos
Side by side with Itaquaquecetuba (the nearest), Gujranwala (the world's worst on 30 days).
Rio Claro
Side by side with Limeira (the nearest), Nilópolis (Brazil's 2nd worst on 30 days), Gujranwala (the world's worst on 30 days).
Use this page
SmogRank, PM2.5 daily means compared, Ferraz de Vasconcelos and Rio Claro, 12 Oct 2025 – 11 Oct 2026, smogrank.com/compare/br-ferraz-de-vasconcelos/br-rio-claro (accessed 13 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 2026-10-13 01:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the US AQI PM2.5 sub-index.