What is the air quality trend in São Mateus?

Over the past 8 days, São Mateus had an average AQI of 63 based on station measurements. The worst day was 2026-08-29 with AQI 93.

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.

Current AQI
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

153h

PM2.5 Station

153h · 1 station

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	PM10 avg	Hours	Stations
2026-09-05	80	20–112	26.3 µg/m³	31.7	15h	1
2026-09-04	57	17–122	17.2 µg/m³	21.3	22h	1
2026-09-03	57	19–101	16.7 µg/m³	20.7	24h	1
2026-09-02	34	10–78	8.8 µg/m³	11.6	13h	1
2026-09-01	39	7–123	11.1 µg/m³	13.6	23h	1
2026-08-31	59	2–125	18.5 µg/m³	21.5	24h	1
2026-08-30	88	3–123	30.0 µg/m³	37.5	24h	1
2026-08-29	93	70–118	31.7 µg/m³	37.7	8h	1

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