What is the air quality trend in Santos?

Over the past 8 days, Santos had an average AQI of 57 based on station measurements. The worst day was 2026-07-16 with AQI 68.

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 · 20 stations

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	PM10 avg	Hours	Stations
2026-07-22	68	68–68	20.4 µg/m³	10.9	1h	20
2026-07-21	44	27–78	11.4 µg/m³	9.7	24h	20
2026-07-20	43	23–67	10.7 µg/m³	10.1	24h	20
2026-07-19	44	26–85	11.1 µg/m³	10.0	24h	21
2026-07-18	60	33–125	17.0 µg/m³	8.3	24h	20
2026-07-17	65	43–111	18.8 µg/m³	17.3	24h	18
2026-07-16	68	38–187	22.7 µg/m³	22.0	24h	20
2026-07-15	66	40–118	19.3 µg/m³	16.0	23h	19

Back to Santos Air Quality