SmogRank / Brazil / Rio de Janeiro

Air quality in Rio de Janeiro

Rio de Janeiro, Brazil. PM2.5 from 14 reference monitors, updated hourly.

5.4 µg/m³
Good

Latest hour (04:00 UTC), 0.4× the WHO 24-hour guideline.

Rank

24 h
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not enough data
7 days
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30 days
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Year
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not enough data

Last 4 days, hour by hour

15302026-10-01 03:00 UTC: 5.3 µg/m³2026-10-01 04:00 UTC: 5.4 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
CentroCC BY 4.0 (Rio de Janeiro, MonitorAr)Rio City HallReference
Engenheiro LealCC BY 4.0 (Rio de Janeiro, MonitorAr)Rio City HallReference
Presidente VargasCC BY 4.0 (Rio de Janeiro, MonitorAr)Rio City HallReference
Campo de SantanaCC BY 4.0 (Rio de Janeiro, MonitorAr)Rio City HallReference
QuintinoCC BY 4.0 (Rio de Janeiro, MonitorAr)Rio City HallReference
Cascadura CC BY 4.0 (Rio de Janeiro, MonitorAr)Rio City HallReference
MadureiraCC BY 4.0 (Rio de Janeiro, MonitorAr)Rio City HallReference
MAMCC BY 4.0 (Rio de Janeiro, MonitorAr)Rio City HallReference
Praça XVCC BY 4.0 (Rio de Janeiro, MonitorAr)Rio City HallReference
Parque MadureiraCC BY 4.0 (Rio de Janeiro, MonitorAr)Rio City HallReference
Irajá AurassureCC BY 4.0 (Rio de Janeiro, MonitorAr)Rio City HallReference
RamosCC BY 4.0 (Rio de Janeiro, MonitorAr)Rio City HallReference
RocinhaCC BY 4.0 (Rio de Janeiro, MonitorAr)Rio City HallReference
Tijuca AurassureCC 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.