What is the air quality trend in Bilbao?

Over the past 14 days, Bilbao had an average AQI of 222 based on station measurements. The worst day was with AQI .

How is Bilbao air quality measured?

Air quality in Bilbao 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 Bilbao, Spain

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

Historical PM2.5 and AQI trend from monitoring stations near Bilbao, Spain.

Current AQI
Moderate

48 Hours 7 Days 14 Days 20 Days

PM2.5 Trend

263h · 6 stations

Daily Summary

Date	AQI	Range	PM2.5 avg	PM10 avg	Hours	Stations
2026-04-10	239	52–500	300.1 µg/m³	29.8	22h	7
2026-04-09	185	23–500	202.1 µg/m³	24.3	17h	6
2026-04-08	378	62–500	511.6 µg/m³	15.6	9h	7
2026-04-07	69	14–190	29.5 µg/m³	13.2	24h	6
2026-04-06	23	5–66	5.8 µg/m³	9.3	19h	5
2026-04-04	288	8–500	906.8 µg/m³	7.6	15h	6
2026-04-03	310	8–500	512.1 µg/m³	7.3	24h	6
2026-04-02	390	8–500	750.8 µg/m³	4.4	23h	5
2026-04-01	391	9–500	844.8 µg/m³	6.8	24h	6
2026-03-31	334	36–500	708.7 µg/m³	15.3	24h	6
2026-03-30	298	12–500	1066.3 µg/m³	6.0	12h	5
2026-03-29	86	12–500	120.4 µg/m³	7.6	24h	6
2026-03-28	74	14–500	127.6 µg/m³	10.3	24h	6
2026-03-27	50	46–54	12.2 µg/m³	9.8	2h	5

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