What is the air quality trend in Valongo?

Over the past 13 days, Valongo had an average AQI of 30 based on station measurements. The worst day was 2026-05-30 with AQI 49.

How is Valongo air quality measured?

Air quality in Valongo 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 Valongo, Portugal

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

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

Current AQI
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

281h

PM2.5 Station

281h · 1 station

Temperature GFS model

56pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	PM10 avg	Hours	Stations
2026-05-30	49	10–61	12.8 µg/m³	22.8	21h	1
2026-05-29	48	30–61	11.9 µg/m³	20.4	24h	1
2026-05-28	38	19–58	9.3 µg/m³	15.0	24h	1
2026-05-27	46	21–61	11.5 µg/m³	17.9	24h	1
2026-05-26	34	11–58	8.2 µg/m³	11.9	24h	1
2026-05-25	39	11–69	10.1 µg/m³	16.6	24h	1
2026-05-24	35	12–59	8.5 µg/m³	13.5	23h	1
2026-05-23	29	9–59	7.1 µg/m³	10.8	24h	1
2026-05-22	28	6–49	6.6 µg/m³	8.7	22h	1
2026-05-21	27	3–57	6.6 µg/m³	9.7	21h	1
2026-05-20	16	3–46	3.8 µg/m³	4.6	21h	1
2026-05-19	7	1–42	1.7 µg/m³	2.0	18h	1
2026-05-18	6	1–13	1.2 µg/m³	0.7	11h	1

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