SmogRank / Brazil / Rio de Janeiro

Air quality in Duque de Caxias

Rio de Janeiro, Brazil. PM2.5 from 2 reference monitors, updated hourly.

7.9 µg/m³
Good

Latest hour (04:00 UTC), 0.5× the WHO 24-hour guideline.

Rank

24 h
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7 days
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30 days
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Year
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Last 4 days, hour by hour

15302026-10-01 03:00 UTC: 8.1 µg/m³2026-10-01 04:00 UTC: 7.9 µg/m³Sep 28Sep 29Sep 30Oct 1

Times in UTC. Dashed line: WHO 24-hour guideline (15 µg/m³).

Every day for a year

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Good 0–9.0Moderate 9.1+Unhealthy for sensitive groups 35.5+Unhealthy 55.5+Very unhealthy 125.5+Hazardous 225.5+No data

Daily history appears as days complete.

Monitors

StationOperatorType
IrajáCC BY 4.0 (Rio de Janeiro, MonitorAr)Rio City HallReference
PavunaCC BY 4.0 (Rio de Janeiro, MonitorAr)Rio City HallReference

The city's value is the median of its reference monitors each hour; low-cost sensors are listed but not counted when reference monitors exist. Data via OpenAQ; licences as listed. How we rank. Embed this on your site.

Updated 2026-10-01 05:07 UTC. Values are PM2.5 in µg/m³ (fine particles), the median of each city's monitors.