What is the air quality trend in San Leandro?

Over the past 3 days, San Leandro had an average AQI of 24 based on station measurements. The worst day was 2026-09-05 with AQI 27.

How is San Leandro air quality measured?

Air quality in San Leandro 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 Leandro, United States

Name: San Leandro 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 Leandro, United States.

Current AQI
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

45h

PM2.5 Station

45h · 110 stations

Temperature GFS model

8pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	PM10 avg	Hours	Stations
2026-09-05	27	24–51	6.4 µg/m³	4.2	15h	108
2026-09-04	23	13–28	5.4 µg/m³	3.4	24h	109
2026-09-03	22	18–25	5.2 µg/m³	2.2	6h	109

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