What is the air quality trend in Santos?

Over the past 8 days, Santos had an average AQI of 81 based on station measurements. The worst day was 2026-05-23 with AQI 96.

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
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

169h

PM2.5 Station

169h · 3 stations

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	PM10 avg	Hours	Stations
2026-05-30	67	36–94	19.9 µg/m³	26.4	20h	23
2026-05-29	64	38–89	18.7 µg/m³	14.8	24h	22
2026-05-28	61	30–152	17.5 µg/m³	5.2	24h	24
2026-05-27	89	56–152	29.6 µg/m³	25.3	24h	24
2026-05-26	89	38–139	30.0 µg/m³	20.9	24h	26
2026-05-25	95	34–160	33.4 µg/m³	25.5	24h	26
2026-05-24	94	62–163	33.4 µg/m³	29.8	24h	26
2026-05-23	96	62–144	32.5 µg/m³	30.9	5h	24

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