What is the air quality trend in San Ramon?

Over the past 7 days, San Ramon had an average AQI of 36 based on station measurements. The worst day was 2026-08-03 with AQI 45.

How is San Ramon air quality measured?

Air quality in San Ramon 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 Ramon, United States

Name: San Ramon 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 Ramon, United States.

Current AQI
Moderate CAMS model

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

165h

PM2.5 Station

165h · 102 stations

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	PM10 avg	Hours	Stations
2026-08-07	33	23–42	7.9 µg/m³	5.5	23h	101
2026-08-06	34	28–61	8.3 µg/m³	5.1	24h	97
2026-08-05	37	33–41	8.8 µg/m³	7.0	24h	94
2026-08-04	40	33–48	9.6 µg/m³	7.9	24h	97
2026-08-03	45	36–55	10.9 µg/m³	15.9	24h	93
2026-08-02	35	29–40	8.4 µg/m³	9.9	24h	100
2026-08-01	29	25–34	7.0 µg/m³	5.3	22h	100

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