What is the air quality trend in Covilhã?

Over the past 3 days, Covilhã had an average AQI of 9 based on station measurements. The worst day was with AQI .

How is Covilhã air quality measured?

Air quality in Covilhã 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 Covilhã, Portugal

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

Historical PM2.5 and AQI trend from monitoring stations near Covilhã, Portugal.

Current AQI
Good

48 Hours 7 Days 14 Days 20 Days

PM2.5 Trend

28h · 1 station

Daily Summary

Date	AQI	Range	PM2.5 avg	PM10 avg	Hours	Stations
2026-04-11	7	7–7	1.7 µg/m³	1.7	1h	1
2026-04-10	12	2–53	2.6 µg/m³	3.8	17h	1
2026-04-09	8	1–40	1.9 µg/m³	2.8	10h	1

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