What is the air quality trend in Santa Rosa?

Over the past 8 days, Santa Rosa had an average AQI of 27 based on station measurements. The worst day was 2026-10-18 with AQI 61.

How is Santa Rosa air quality measured?

Air quality in Santa Rosa 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 Santa Rosa, United States

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

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

Current AQI
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

160h

PM2.5 Station

160h · 18 stations

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-10-20	18	15–20	4.2 µg/m³	18h	18
2026-10-19	28	20–44	6.7 µg/m³	24h	18
2026-10-18	61	36–81	17.1 µg/m³	22h	18
2026-10-17	39	14–66	9.7 µg/m³	24h	18
2026-10-16	19	14–28	4.5 µg/m³	23h	18
2026-10-15	21	14–27	5.1 µg/m³	24h	18
2026-10-14	19	15–23	4.7 µg/m³	24h	18
2026-10-13	15	15–15	3.6 µg/m³	1h	18

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