What is the air quality trend in Marinha Grande?

Over the past 15 days, Marinha Grande had an average AQI of 35 based on station measurements. The worst day was 2026-08-29 with AQI 49.

How is Marinha Grande air quality measured?

Air quality in Marinha Grande 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 Marinha Grande, Portugal

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

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

Current AQI
Good CAMS model

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

172h

PM2.5 Station

172h · 1 station

Temperature GFS model

56pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-09-05	45	20–73	11.8 µg/m³	8h	1
2026-09-04	36	9–131	10.2 µg/m³	12h	1
2026-09-03	29	14–46	6.9 µg/m³	10h	1
2026-09-02	39	14–159	11.9 µg/m³	14h	1
2026-09-01	29	7–71	7.4 µg/m³	14h	1
2026-08-31	33	8–68	8.5 µg/m³	13h	1
2026-08-30	25	13–44	6.0 µg/m³	10h	1
2026-08-29	49	13–107	13.9 µg/m³	12h	1
2026-08-28	40	22–89	10.9 µg/m³	12h	1
2026-08-27	41	20–86	11.3 µg/m³	12h	1
2026-08-26	38	6–87	9.9 µg/m³	12h	1
2026-08-25	43	12–170	14.0 µg/m³	16h	1
2026-08-24	24	5–59	5.8 µg/m³	12h	1
2026-08-23	39	15–99	10.1 µg/m³	14h	1
2026-08-22	15	15–15	3.6 µg/m³	1h	1

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