What is the air quality trend in San Ramon?

Over the past 8 days, San Ramon had an average AQI of 30 based on station measurements. The worst day was 2026-06-05 with AQI 39.

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
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

166h

PM2.5 Station

166h · 112 stations

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	PM10 avg	Hours	Stations
2026-06-09	22	20–23	5.2 µg/m³	5.0	8h	109
2026-06-08	25	20–27	5.9 µg/m³	3.7	24h	110
2026-06-07	28	25–30	6.7 µg/m³	4.1	24h	109
2026-06-06	32	26–36	7.6 µg/m³	6.8	24h	103
2026-06-05	39	35–42	9.4 µg/m³	11.3	24h	108
2026-06-04	27	20–35	6.6 µg/m³	5.5	24h	108
2026-06-03	31	28–36	7.4 µg/m³	4.1	24h	107
2026-06-02	38	34–41	9.2 µg/m³	5.7	14h	108

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