What is the air quality trend in Orinda?

Over the past 8 days, Orinda had an average AQI of 29 based on station measurements. The worst day was 2026-07-17 with AQI 36.

How is Orinda air quality measured?

Air quality in Orinda 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 Orinda, United States

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

Historical PM2.5 and AQI trend from monitoring stations near Orinda, United States.

Current AQI
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

167h

PM2.5 Station

167h · 102 stations

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	PM10 avg	Hours	Stations
2026-07-22	22	21–23	5.2 µg/m³	1.1	3h	104
2026-07-21	30	24–55	7.2 µg/m³	4.9	24h	101
2026-07-20	22	17–58	5.4 µg/m³	2.8	24h	95
2026-07-19	26	20–40	6.2 µg/m³	4.3	24h	100
2026-07-18	28	21–58	6.9 µg/m³	3.4	24h	102
2026-07-17	36	32–38	8.6 µg/m³	8.7	24h	103
2026-07-16	35	31–52	8.3 µg/m³	6.8	24h	96
2026-07-15	35	18–57	8.4 µg/m³	6.0	20h	92

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