What is the air quality trend in Santa Iria da Azóia?

Over the past 3 days, Santa Iria da Azóia had an average AQI of 55 based on station measurements. The worst day was 2026-07-20 with AQI 70.

How is Santa Iria da Azóia air quality measured?

Air quality in Santa Iria da Azóia 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 Santa Iria da Azóia, Portugal

Name: Santa Iria da Azóia Air Quality History
Creator: CERNS.IO
License: https://creativecommons.org/licenses/by/4.0/

Historical PM2.5 and AQI trend from monitoring stations near Santa Iria da Azóia, Portugal.

Current AQI
Moderate Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

47h

PM2.5 Station

47h · 1 station

Temperature GFS model

8pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	PM10 avg	Hours	Stations
2026-07-22	66	27–75	19.9 µg/m³	21.8	10h	1
2026-07-21	29	6–76	7.9 µg/m³	9.2	24h	1
2026-07-20	70	63–79	21.2 µg/m³	23.5	13h	1

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