SmogRank / Brazil / Rio de Janeiro / Barra da Tijuca

Barra da Tijuca, month by month

Barra da Tijuca has a measured daily mean on 302 days since 5 December 2025. Its worst month was June 2026, at 59 US AQI (13.3 µg/m³), 406th of 2,497 cities on that month's world ranking. Its cleanest was February 2026, at 28 US AQI (5.1 µg/m³).

Every month since 2025

202645 so far277 days measured1,784th of 2,798 in the world
Jan36#1,995Feb28#2,588Mar29#2,638Apr39#1,867May42#1,449Jun59#406Jul53#1,280Aug55#677Sep38#1,372Oct44#1,006
2025too few days for a mean (a year needs 256)25 days measured
JanFebMarAprMayJunJulAugSepOctNovDec30#2,605
Each square is a month's mean PM2.5 in US AQI from Barra da Tijuca's measured days, with its place on that month's world ranking under it. A month has a mean once 70% of its days are measured, the rule the monthly rankings use; under that, the square gives the days measured. Each square opens that month's ranking with Barra da Tijuca marked; each year, the year's. A dashed square is the running month, so far.
Good0–50
Moderate51–100
Unhealthy for sensitive groups101–150
Unhealthy151–200
Very unhealthy201–300
Hazardous301+

The US EPA's Air Quality Index for PM2.5 (2024 breakpoints). Show values as: µg/m³ · US AQI · India AQI · China AQI · European AQI · UK DAQI · Canada AQHI+. About the scales

Barra da Tijuca's worst months

MonthUS AQIDays measuredWorld rankEpisode
June 2026 5913.3 µg/m³28 of 30406thof 2,497Rio de Janeiro and São Paulo, Brazil, June 2026
August 2026 5511.1 µg/m³31 of 31677thof 2,896–
July 2026 5310.3 µg/m³30 of 311,280thof 2,784–
May 2026 427.6 µg/m³31 of 311,449thof 2,874–
April 2026 397.1 µg/m³28 of 301,867thof 2,941–
September 2026 386.8 µg/m³30 of 301,372ndof 2,997–

Monthly means over the days measured; finished months only. World rank: its place on that month's world ranking of every city with enough days. Each month opens that ranking.

Barra da Tijuca's worst days

DayUS AQIEpisode
11 Jun 2026 10236.1 µg/m³Rio de Janeiro and São Paulo, Brazil, June 2026
28 Jun 2026 9432.2 µg/m³–
12 Jun 2026 9030.3 µg/m³–
4 Aug 2026 9030.3 µg/m³–
11 Jul 2026 8426.7 µg/m³–
28 Jul 2026 8225.7 µg/m³–
20 Aug 2026 8125.3 µg/m³–
1 Jan 2026 7923.9 µg/m³–
27 Jun 2026 7823.4 µg/m³–
16 May 2026 7722.9 µg/m³–

Daily means, the highest since 5 Dec 2025; the WHO's daily guideline is 15 µg/m³. Each date opens that day's world ranking, and each episode the bad-air spell it was part of.

Use this history

SmogRank, PM2.5 monthly and daily means, Barra da Tijuca, Brazil, 5 Dec 2025 – 12 Oct 2026. Monitor data from Rio City Hall via OpenAQ; sources listed at smogrank.com/sources. smogrank.com/br/barra-da-tijuca/history (accessed 13 Oct 2026).

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Barra da Tijuca now: the last 24 hours, its ranks today and the last 12 months day by day.

Updated 2026-10-13 05:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the US AQI PM2.5 sub-index. Some low-cost readings: Sensor.Community, ODbL (data and licence). Some readings: Uzhydromet (Uzbekistan's Hydrometeorological Service); Department of Environment, Nepal; Vietnam's government monitors; Aurassure; Umhverfisstofnun (Environment Agency of Iceland); RMCAB (Secretaría Distrital de Ambiente, Bogotá); Love My Air (City and County of Denver), no reuse terms published (why we use them).