Itaquaquecetuba vs Rio Claro: PM2.5 compared

Over the last year, Rio Claro's air was 46% more polluted than Itaquaquecetuba's: PM2.5 averaged 14.2 µg/m³ against 9.7, on the 339 days both cities were measured. Rio Claro had the dirtier air on 281 of those days, Itaquaquecetuba on 58. Rio Claro was over the WHO's daily guideline of 15 µg/m³ on 120 of them, Itaquaquecetuba on 45.

Right now

Itaquaquecetuba#1,617on the 24-hour board of 2,581, at 27 US AQI (4.9 µg/m³)

Rio Claro#381on the 24-hour board of 2,581, at 60 US AQI (13.8 µg/m³)

The last year, day by day

Itaquaquecetuba

Rio Claro

Each city's daily mean from 13 Oct 2025 to 12 Oct 2026, one stripe a day, coloured by band. A blank stripe is a day without a daily mean.

Month by month

Monthly means in µg/m³ over the days both cities were measured. Solid: Itaquaquecetuba. Faded: Rio Claro. A month shows once both share 10 such days. Dashed line: the WHO daily guideline, 15 µg/m³.

Year by year

Year	Itaquaquecetuba	Rio Claro	Days both measured	Days Itaquaquecetuba was worse
2026 so far	9.5	14.8	259	34
2025	12.8	16.1	359	81
2024	18.4	21.5	297	89
2023	15.0	16.8	297	85

Means in µg/m³, as in the chart above, over the days both cities were measured that year; a year shows once they share 30 such days.

Each city's worst days

Itaquaquecetuba

19 Aug 20269532.7 µg/m³
10 Jun 20268728.5 µg/m³
20 Aug 20268728.3 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

Itaquaquecetuba

Side by side with Ferraz de Vasconcelos (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, Itaquaquecetuba and Rio Claro, 13 Oct 2025 – 12 Oct 2026, smogrank.com/compare/br-itaquaquecetuba/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 04:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the US AQI PM2.5 sub-index.