SmogRank / Brazil / São Paulo

Air quality in São Sebastião

São Paulo, Brazil. Over the last 24 hours its air rated Good, the 2,434th most polluted of 2,646 cities measured.

24-hour average12US AQI
Good

PM2.5 2.2 µg/m³, 0.1× the WHO 24-hour guideline. The figure the 24-hour ranking uses.

Latest hour: 6 US AQI (1.0 µg/m³), local time

Last 4 days, hour by hour

153010 Oct 18:00 local, 2026-10-10 21:00 UTC: 8.0 µg/m³10 Oct 19:00 local, 2026-10-10 22:00 UTC: 9.0 µg/m³10 Oct 20:00 local, 2026-10-10 23:00 UTC: 9.0 µg/m³10 Oct 21:00 local, 2026-10-11 00:00 UTC: 8.0 µg/m³10 Oct 22:00 local, 2026-10-11 01:00 UTC: 9.0 µg/m³10 Oct 23:00 local, 2026-10-11 02:00 UTC: 10.0 µg/m³11 Oct 00:00 local, 2026-10-11 03:00 UTC: 9.0 µg/m³11 Oct 01:00 local, 2026-10-11 04:00 UTC: 8.0 µg/m³11 Oct 02:00 local, 2026-10-11 05:00 UTC: 7.0 µg/m³11 Oct 03:00 local, 2026-10-11 06:00 UTC: 6.0 µg/m³11 Oct 04:00 local, 2026-10-11 07:00 UTC: 7.0 µg/m³11 Oct 05:00 local, 2026-10-11 08:00 UTC: 5.0 µg/m³11 Oct 06:00 local, 2026-10-11 09:00 UTC: 5.0 µg/m³11 Oct 07:00 local, 2026-10-11 10:00 UTC: 5.0 µg/m³11 Oct 08:00 local, 2026-10-11 11:00 UTC: 6.0 µg/m³11 Oct 09:00 local, 2026-10-11 12:00 UTC: 6.0 µg/m³11 Oct 10:00 local, 2026-10-11 13:00 UTC: 6.0 µg/m³11 Oct 11:00 local, 2026-10-11 14:00 UTC: 8.0 µg/m³11 Oct 12:00 local, 2026-10-11 15:00 UTC: 7.0 µg/m³11 Oct 13:00 local, 2026-10-11 16:00 UTC: 6.0 µg/m³11 Oct 14:00 local, 2026-10-11 17:00 UTC: 6.0 µg/m³11 Oct 15:00 local, 2026-10-11 18:00 UTC: 5.0 µg/m³11 Oct 16:00 local, 2026-10-11 19:00 UTC: 5.0 µg/m³11 Oct 17:00 local, 2026-10-11 20:00 UTC: 4.0 µg/m³11 Oct 18:00 local, 2026-10-11 21:00 UTC: 5.0 µg/m³11 Oct 19:00 local, 2026-10-11 22:00 UTC: 4.0 µg/m³11 Oct 20:00 local, 2026-10-11 23:00 UTC: 5.0 µg/m³11 Oct 21:00 local, 2026-10-12 00:00 UTC: 4.0 µg/m³11 Oct 22:00 local, 2026-10-12 01:00 UTC: 4.0 µg/m³11 Oct 23:00 local, 2026-10-12 02:00 UTC: 3.0 µg/m³12 Oct 00:00 local, 2026-10-12 03:00 UTC: 3.0 µg/m³12 Oct 01:00 local, 2026-10-12 04:00 UTC: 3.0 µg/m³12 Oct 02:00 local, 2026-10-12 05:00 UTC: 4.0 µg/m³12 Oct 03:00 local, 2026-10-12 06:00 UTC: 2.0 µg/m³12 Oct 04:00 local, 2026-10-12 07:00 UTC: 2.0 µg/m³12 Oct 05:00 local, 2026-10-12 08:00 UTC: 3.0 µg/m³12 Oct 06:00 local, 2026-10-12 09:00 UTC: 2.0 µg/m³12 Oct 07:00 local, 2026-10-12 10:00 UTC: 1.0 µg/m³12 Oct 08:00 local, 2026-10-12 11:00 UTC: 1.0 µg/m³12 Oct 09:00 local, 2026-10-12 12:00 UTC: 1.0 µg/m³12 Oct 10:00 local, 2026-10-12 13:00 UTC: 1.0 µg/m³12 Oct 11:00 local, 2026-10-12 14:00 UTC: 1.0 µg/m³12 Oct 12:00 local, 2026-10-12 15:00 UTC: 2.0 µg/m³12 Oct 13:00 local, 2026-10-12 16:00 UTC: 2.0 µg/m³12 Oct 14:00 local, 2026-10-12 17:00 UTC: 2.0 µg/m³12 Oct 15:00 local, 2026-10-12 18:00 UTC: 2.0 µg/m³12 Oct 16:00 local, 2026-10-12 19:00 UTC: 3.0 µg/m³12 Oct 17:00 local, 2026-10-12 20:00 UTC: 3.0 µg/m³12 Oct 18:00 local, 2026-10-12 21:00 UTC: 3.0 µg/m³12 Oct 19:00 local, 2026-10-12 22:00 UTC: 3.0 µg/m³12 Oct 20:00 local, 2026-10-12 23:00 UTC: 2.0 µg/m³12 Oct 21:00 local, 2026-10-13 00:00 UTC: 3.0 µg/m³12 Oct 22:00 local, 2026-10-13 01:00 UTC: 4.0 µg/m³12 Oct 23:00 local, 2026-10-13 02:00 UTC: 3.0 µg/m³13 Oct 00:00 local, 2026-10-13 03:00 UTC: 3.0 µg/m³13 Oct 01:00 local, 2026-10-13 04:00 UTC: 2.0 µg/m³13 Oct 02:00 local, 2026-10-13 05:00 UTC: 1.0 µg/m³Oct 10Oct 11Oct 12
São Sebastião's local time; hover a bar for UTC. Dashed line: WHO 24-hour guideline (15 µg/m³).

Where São Sebastião ranks

24 hours#2,434of 2,646, at 12 US AQI (2.2 µg/m³); down 901 places since yesterday
7 days#2,201of 2,928, at 28 US AQI (5.0 µg/m³); down 47 places since yesterday
30 days–not enough data
This year–not enough data

Unhealthy days this year: 0 of 10 measured days had a daily mean over 35.4 µg/m³ (US AQI 101+).

Peak not checked: São Sebastião is measured at one place (monitors within 3 km of each other count as one), and its worst hours need a second place to confirm them.

The last 12 months, day by day

1102031Nov 2025DecJan 2026FebMarAprMayJunJulAugSepOct2025-11-01: no monitor reporting here yet2025-11-02: no monitor reporting here yet2025-11-03: no monitor reporting here yet2025-11-04: no monitor reporting here yet2025-11-05: no monitor reporting here yet2025-11-06: no monitor reporting here yet2025-11-07: no monitor reporting here yet2025-11-08: no monitor reporting here yet2025-11-09: no monitor reporting here yet2025-11-10: no monitor reporting here yet2025-11-11: no monitor reporting here yet2025-11-12: no monitor reporting here yet2025-11-13: no monitor reporting here yet2025-11-14: no monitor reporting here yet2025-11-15: no monitor reporting here yet2025-11-16: no monitor reporting here yet2025-11-17: no monitor reporting here yet2025-11-18: no monitor reporting here yet2025-11-19: no monitor reporting here yet2025-11-20: no monitor reporting here yet2025-11-21: no monitor reporting here yet2025-11-22: no monitor reporting here yet2025-11-23: no monitor reporting here yet2025-11-24: no monitor reporting here yet2025-11-25: no monitor reporting here yet2025-11-26: no monitor reporting here yet2025-11-27: no monitor reporting here yet2025-11-28: no monitor reporting here yet2025-11-29: no monitor reporting here yet2025-11-30: no monitor reporting here yet2025-12-01: no monitor reporting here yet2025-12-02: no monitor reporting here yet2025-12-03: no monitor reporting here yet2025-12-04: no monitor reporting here yet2025-12-05: no monitor reporting here yet2025-12-06: no monitor reporting here yet2025-12-07: no monitor reporting here yet2025-12-08: no monitor reporting here yet2025-12-09: no monitor reporting here yet2025-12-10: no monitor reporting here yet2025-12-11: no monitor reporting here yet2025-12-12: no monitor reporting here yet2025-12-13: no monitor reporting here yet2025-12-14: no monitor reporting here yet2025-12-15: no monitor reporting here yet2025-12-16: no monitor reporting here yet2025-12-17: no monitor reporting here yet2025-12-18: no monitor reporting here yet2025-12-19: no monitor reporting here yet2025-12-20: no monitor reporting here yet2025-12-21: no monitor reporting here yet2025-12-22: no monitor reporting here yet2025-12-23: no monitor reporting here yet2025-12-24: no monitor reporting here yet2025-12-25: no monitor reporting here yet2025-12-26: no monitor reporting here yet2025-12-27: no monitor reporting here yet2025-12-28: no monitor reporting here yet2025-12-29: no monitor reporting here yet2025-12-30: no monitor reporting here yet2025-12-31: no monitor reporting here yet2026-01-01: no monitor reporting here yet2026-01-02: no monitor reporting here yet2026-01-03: no monitor reporting here yet2026-01-04: no monitor reporting here yet2026-01-05: no monitor reporting here yet2026-01-06: no monitor reporting here yet2026-01-07: no monitor reporting here yet2026-01-08: no monitor reporting here yet2026-01-09: no monitor reporting here yet2026-01-10: no monitor reporting here yet2026-01-11: no monitor 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yet2026-02-05: no monitor reporting here yet2026-02-06: no monitor reporting here yet2026-02-07: no monitor reporting here yet2026-02-08: no monitor reporting here yet2026-02-09: no monitor reporting here yet2026-02-10: no monitor reporting here yet2026-02-11: no monitor reporting here yet2026-02-12: no monitor reporting here yet2026-02-13: no monitor reporting here yet2026-02-14: no monitor reporting here yet2026-02-15: no monitor reporting here yet2026-02-16: no monitor reporting here yet2026-02-17: no monitor reporting here yet2026-02-18: no monitor reporting here yet2026-02-19: no monitor reporting here yet2026-02-20: no monitor reporting here yet2026-02-21: no monitor reporting here yet2026-02-22: no monitor reporting here yet2026-02-23: no monitor reporting here yet2026-02-24: no monitor reporting here yet2026-02-25: no monitor reporting here yet2026-02-26: no monitor reporting here yet2026-02-27: no monitor reporting here yet2026-02-28: no monitor reporting here yet2026-03-01: no monitor reporting here yet2026-03-02: no monitor reporting here yet2026-03-03: no monitor reporting here yet2026-03-04: no monitor reporting here yet2026-03-05: no monitor reporting here yet2026-03-06: no monitor reporting here yet2026-03-07: no monitor reporting here yet2026-03-08: no monitor reporting here yet2026-03-09: no monitor reporting here yet2026-03-10: no monitor reporting here yet2026-03-11: no monitor reporting here yet2026-03-12: no monitor reporting here yet2026-03-13: no monitor reporting here yet2026-03-14: no monitor reporting here yet2026-03-15: no monitor reporting here yet2026-03-16: no monitor reporting here yet2026-03-17: no monitor reporting here yet2026-03-18: no monitor reporting here yet2026-03-19: no monitor reporting here yet2026-03-20: no monitor reporting here yet2026-03-21: no monitor reporting here yet2026-03-22: no monitor reporting here yet2026-03-23: no monitor reporting here yet2026-03-24: no monitor reporting here yet2026-03-25: no monitor reporting here yet2026-03-26: no monitor reporting here yet2026-03-27: no monitor reporting here yet2026-03-28: no monitor reporting here yet2026-03-29: no monitor reporting here yet2026-03-30: no monitor reporting here yet2026-03-31: no monitor reporting here yet2026-04-01: no monitor reporting here yet2026-04-02: no monitor reporting here yet2026-04-03: no monitor reporting here yet2026-04-04: no monitor reporting here yet2026-04-05: no monitor reporting here yet2026-04-06: no monitor reporting here yet2026-04-07: no monitor reporting here yet2026-04-08: no monitor reporting here yet2026-04-09: no monitor reporting here yet2026-04-10: no monitor reporting here yet2026-04-11: no monitor reporting here yet2026-04-12: no monitor reporting here yet2026-04-13: no monitor reporting here yet2026-04-14: no monitor reporting here yet2026-04-15: no monitor reporting here yet2026-04-16: no monitor reporting here yet2026-04-17: no monitor reporting here yet2026-04-18: no monitor reporting here yet2026-04-19: no monitor reporting here yet2026-04-20: no monitor reporting here yet2026-04-21: no monitor reporting here yet2026-04-22: no monitor reporting here yet2026-04-23: no monitor reporting here yet2026-04-24: no monitor reporting here yet2026-04-25: no monitor reporting here yet2026-04-26: no monitor reporting here yet2026-04-27: no monitor reporting here yet2026-04-28: no monitor reporting here yet2026-04-29: no monitor reporting here yet2026-04-30: no monitor reporting here yet2026-05-01: no monitor reporting here yet2026-05-02: no monitor reporting here yet2026-05-03: no monitor reporting here yet2026-05-04: no monitor reporting here yet2026-05-05: no monitor reporting here yet2026-05-06: no monitor reporting here yet2026-05-07: no monitor reporting here yet2026-05-08: no monitor reporting here yet2026-05-09: no monitor reporting here yet2026-05-10: no monitor reporting here yet2026-05-11: no monitor reporting here yet2026-05-12: no monitor reporting here yet2026-05-13: no monitor reporting here yet2026-05-14: no monitor reporting here yet2026-05-15: no monitor reporting here yet2026-05-16: no monitor reporting here yet2026-05-17: no monitor reporting here yet2026-05-18: no monitor reporting here yet2026-05-19: no monitor reporting here yet2026-05-20: no monitor reporting here yet2026-05-21: no monitor reporting here yet2026-05-22: no monitor reporting here yet2026-05-23: no monitor reporting here yet2026-05-24: no monitor reporting here yet2026-05-25: no monitor reporting here yet2026-05-26: no monitor reporting here yet2026-05-27: no monitor reporting here yet2026-05-28: no monitor reporting here yet2026-05-29: no monitor reporting here yet2026-05-30: no monitor reporting here yet2026-05-31: no monitor reporting here yet2026-06-01: no monitor reporting here yet2026-06-02: no monitor reporting here yet2026-06-03: no monitor reporting here yet2026-06-04: no monitor reporting here yet2026-06-05: no monitor reporting here yet2026-06-06: no monitor reporting here yet2026-06-07: no monitor reporting here yet2026-06-08: no monitor reporting here yet2026-06-09: no monitor reporting here yet2026-06-10: no monitor reporting here yet2026-06-11: no monitor reporting here yet2026-06-12: no monitor reporting here yet2026-06-13: no monitor reporting here yet2026-06-14: no monitor reporting here yet2026-06-15: no monitor reporting here yet2026-06-16: no monitor reporting here yet2026-06-17: no monitor reporting here yet2026-06-18: no monitor reporting here yet2026-06-19: no monitor reporting here yet2026-06-20: no monitor reporting here yet2026-06-21: no monitor reporting here yet2026-06-22: no monitor reporting here yet2026-06-23: no monitor reporting here yet2026-06-24: no monitor reporting here yet2026-06-25: no monitor reporting here yet2026-06-26: no monitor reporting here yet2026-06-27: no monitor reporting here yet2026-06-28: no monitor reporting here yet2026-06-29: no monitor reporting here yet2026-06-30: no monitor reporting here yet2026-07-01: no monitor reporting here yet2026-07-02: no monitor reporting here yet2026-07-03: no monitor reporting here yet2026-07-04: no monitor reporting here yet2026-07-05: no monitor reporting here yet2026-07-06: no monitor reporting here yet2026-07-07: no monitor reporting here yet2026-07-08: no monitor reporting here yet2026-07-09: no monitor reporting here yet2026-07-10: no monitor reporting here yet2026-07-11: no monitor reporting here yet2026-07-12: no monitor reporting here yet2026-07-13: no monitor reporting here yet2026-07-14: no monitor reporting here yet2026-07-15: no monitor reporting here yet2026-07-16: no monitor reporting here yet2026-07-17: no monitor reporting here yet2026-07-18: no monitor reporting here yet2026-07-19: no monitor reporting here yet2026-07-20: no monitor reporting here yet2026-07-21: no monitor reporting here yet2026-07-22: no monitor reporting here yet2026-07-23: no monitor reporting here yet2026-07-24: no monitor reporting here yet2026-07-25: no monitor reporting here yet2026-07-26: no monitor reporting here yet2026-07-27: no monitor reporting here yet2026-07-28: no monitor reporting here yet2026-07-29: no monitor reporting here yet2026-07-30: no monitor reporting here yet2026-07-31: no monitor reporting here yet2026-08-01: no monitor reporting here yet2026-08-02: no monitor reporting here yet2026-08-03: no monitor reporting here yet2026-08-04: no monitor reporting here yet2026-08-05: no monitor reporting here yet2026-08-06: no monitor reporting here yet2026-08-07: no monitor reporting here yet2026-08-08: no monitor reporting here yet2026-08-09: no monitor reporting here yet2026-08-10: no monitor reporting here yet2026-08-11: no monitor reporting here yet2026-08-12: no monitor reporting here yet2026-08-13: no monitor reporting here yet2026-08-14: no monitor reporting here yet2026-08-15: no monitor reporting here yet2026-08-16: no monitor reporting here yet2026-08-17: no monitor reporting here yet2026-08-18: no monitor reporting here yet2026-08-19: no monitor reporting here yet2026-08-20: no monitor reporting here yet2026-08-21: no monitor reporting here yet2026-08-22: no monitor reporting here yet2026-08-23: no monitor reporting here yet2026-08-24: no monitor reporting here yet2026-08-25: no monitor reporting here yet2026-08-26: no monitor reporting here yet2026-08-27: no monitor reporting here yet2026-08-28: no monitor reporting here yet2026-08-29: no monitor reporting here yet2026-08-30: no monitor reporting here yet2026-08-31: no monitor reporting here yet2026-09-01: no monitor reporting here yet2026-09-02: no monitor reporting here yet2026-09-03: no monitor reporting here yet2026-09-04: no monitor reporting here yet2026-09-05: no monitor reporting here yet2026-09-06: no monitor reporting here yet2026-09-07: no monitor reporting here yet2026-09-08: no monitor reporting here yet2026-09-09: no monitor reporting here yet2026-09-10: no monitor reporting here yet2026-09-11: no monitor reporting here yet2026-09-12: no monitor reporting here yet2026-09-13: no monitor reporting here yet2026-09-14: no monitor reporting here yet2026-09-15: no monitor reporting here yet2026-09-16: no monitor reporting here yet2026-09-17: no monitor reporting here yet2026-09-18: no monitor reporting here yet2026-09-19: no monitor reporting here yet2026-09-20: no monitor reporting here yet2026-09-21: no monitor reporting here yet2026-09-22: no monitor reporting here yet2026-09-23: no monitor reporting here yet2026-09-24: no monitor reporting here yet2026-09-25: no monitor reporting here yet2026-09-26: no monitor reporting here yet2026-09-27: no monitor reporting here yet2026-09-28: no monitor reporting here yet2026-09-29: no monitor reporting here yet2026-09-30: no monitor reporting here yet2026-10-01: no monitor reporting here yet2026-10-02: no monitor reporting here yet2026-10-03: 3.3 µg/m³2026-10-04: 4.2 µg/m³2026-10-05: 4.0 µg/m³2026-10-06: 5.1 µg/m³2026-10-07: 4.4 µg/m³2026-10-08: 2.8 µg/m³2026-10-09: 4.9 µg/m³2026-10-10: 10.0 µg/m³2026-10-11: 5.7 µg/m³2026-10-12: 2.3 µg/m³
0 of 10 measured days were over the WHO 24-hour guideline (15 µg/m³). One row per month, one square per local day.
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

2026 against 2025, month by month

15JanFebMarAprMayJunJulAugSepOct 2026: 4.7 µg/m³OctNovDec
Faded bars: 2025. A month shows once it has 10 measured days.

Every month since 2026: each year's mean, the worst months and days, and São Sebastião's place on each month's world ranking.

Monitors

1 listed: 1 reference, 0 low-cost

PM2.5 from 1 reference monitor, updated hourly.

StationOperatorType
São SebastiãoUnrestricted use with credit (Fonte: CETESB, São Paulo)CETESBReferenceCounted

The city's value is the median of its reference monitors each hour, when at least a third of them report (three are always enough); low-cost sensors are listed but not counted when reference monitors exist. Data from CETESB, read from the publisher; licences as listed. How we rank. Embed this on your site.

Compare São Sebastião with another city

Side by side with São José dos Campos (the nearest), Rio Claro (Brazil's worst on 30 days), Gujranwala (the world's worst on 30 days).

Other cities in Brazil

30-day averages, US AQI. All of Brazil.

Updated 2026-10-13 06:10 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the US AQI PM2.5 sub-index.