What is the air quality trend in São Mateus?

Over the past 8 days, São Mateus had an average AQI of 54 based on station measurements. The worst day was 2026-06-09 with AQI 94.

How is São Mateus air quality measured?

Air quality in São Mateus 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 São Mateus, Brazil

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

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

145

Current AQI
Unhealthy for sensitive groups Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

168h

PM2.5 Station

168h · 2 stations

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	PM10 avg	Hours	Stations
2026-06-09	94	73–111	32.1 µg/m³	41.4	11h	2
2026-06-08	67	23–109	20.8 µg/m³	26.1	24h	2
2026-06-07	84	33–119	28.0 µg/m³	35.1	24h	2
2026-06-06	58	22–166	17.8 µg/m³	21.4	24h	2
2026-06-05	19	7–47	4.5 µg/m³	5.9	24h	2
2026-06-04	33	15–67	8.2 µg/m³	9.3	24h	2
2026-06-03	37	12–69	9.4 µg/m³	10.7	24h	2
2026-06-02	46	24–59	11.3 µg/m³	12.5	13h	2

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