What is the air quality trend in San Isidro?

Over the past 15 days, San Isidro had an average AQI of 41 based on station measurements. The worst day was 2026-07-26 with AQI 48.

How is San Isidro air quality measured?

Air quality in San Isidro 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 San Isidro, Spain

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

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

Current AQI
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

333h

PM2.5 Station

333h · 8 stations

Temperature GFS model

56pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-08-08	42	21–77	12.0 µg/m³	3h	11
2026-08-07	40	16–79	9.9 µg/m³	24h	11
2026-08-06	34	21–56	8.2 µg/m³	24h	15
2026-08-05	43	23–93	11.2 µg/m³	24h	16
2026-08-04	41	27–72	10.4 µg/m³	24h	15
2026-08-03	39	22–63	9.6 µg/m³	24h	12
2026-08-02	38	23–52	9.2 µg/m³	24h	10
2026-08-01	37	22–56	8.9 µg/m³	24h	9
2026-07-31	45	18–163	13.7 µg/m³	24h	9
2026-07-30	43	25–95	11.1 µg/m³	24h	10
2026-07-29	44	22–88	11.3 µg/m³	24h	10
2026-07-28	40	21–88	10.4 µg/m³	24h	9
2026-07-27	40	18–75	10.0 µg/m³	24h	9
2026-07-26	48	22–164	14.7 µg/m³	24h	9
2026-07-25	47	28–85	12.6 µg/m³	18h	8

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