What is the air quality trend in Santos?

Over the past 8 days, Santos had an average AQI of 54 based on station measurements. The worst day was 2026-07-16 with AQI 77.

How is Santos air quality measured?

Air quality in Santos is measured by ground-level monitoring stations that report PM2.5 and PM10 concentrations hourly. CERNS.IO aggregates readings from nearby stations and converts PM2.5 to the US EPA Air Quality Index (AQI) scale.

Air Quality History for Santos, Brazil

Name: Santos Air Quality History
Creator: CERNS.IO
License: https://creativecommons.org/licenses/by/4.0/

Historical PM2.5 and AQI trend from monitoring stations near Santos, Brazil.

Current AQI
Moderate Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

168h

PM2.5 Station

168h · 21 stations

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	PM10 avg	Hours	Stations
2026-07-21	47	23–78	12.3 µg/m³	9.0	20h	17
2026-07-20	43	23–68	11.2 µg/m³	10.1	24h	12
2026-07-19	45	28–70	11.0 µg/m³	10.0	24h	11
2026-07-18	51	28–141	14.0 µg/m³	8.3	24h	12
2026-07-17	71	35–159	22.1 µg/m³	17.3	24h	16
2026-07-16	77	44–165	25.2 µg/m³	22.0	24h	14
2026-07-15	60	38–154	16.6 µg/m³	15.5	24h	16
2026-07-14	40	17–53	9.8 µg/m³	7.1	4h	12

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