What is the air quality trend in Mountain View?

Over the past 2 days, Mountain View had an average AQI of 22 based on station measurements. The worst day was 2026-10-19 with AQI 23.

How is Mountain View air quality measured?

Air quality in Mountain View 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 Mountain View, United States

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

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

Current AQI
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

46h

PM2.5 Station

46h · 106 stations

Temperature GFS model

8pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	PM10 avg	Hours	Stations
2026-10-20	21	17–52	4.9 µg/m³	5.4	22h	91
2026-10-19	23	20–27	5.5 µg/m³	11.7	24h	104

Back to Mountain View Air Quality