What is the air quality trend in São Martinho do Bispo?

Over the past 13 days, São Martinho do Bispo had an average AQI of 25 based on station measurements. The worst day was 2026-05-28 with AQI 47.

How is São Martinho do Bispo air quality measured?

Air quality in São Martinho do Bispo 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 Martinho do Bispo, Portugal

Name: São Martinho do Bispo 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 Martinho do Bispo, Portugal.

Current AQI
Good CAMS model

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

190h

PM2.5 Station

190h · 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	29	29–29	7.0 µg/m³	25.5	4h	1
2026-05-29	30	25–38	7.3 µg/m³	24.5	19h	1
2026-05-28	47	42–53	11.2 µg/m³	34.4	19h	1
2026-05-27	46	33–53	11.0 µg/m³	43.1	18h	1
2026-05-26	31	29–33	7.6 µg/m³	30.3	15h	1
2026-05-25	31	25–38	7.6 µg/m³	30.8	18h	1
2026-05-24	22	21–25	5.4 µg/m³	31.2	19h	1
2026-05-23	25	21–29	5.9 µg/m³	29.3	18h	1
2026-05-22	25	4–33	6.1 µg/m³	29.0	15h	1
2026-05-21	15	12–17	3.6 µg/m³	49.8	5h	1
2026-05-20	12	12–12	3.0 µg/m³	48.8	18h	1
2026-05-19	10	8–12	2.4 µg/m³	13.4	17h	1
2026-05-18	9	8–12	2.2 µg/m³	14.4	5h	1

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