What is the air quality trend in Pasadena?

Over the past 7 days, Pasadena had an average AQI of 29 based on station measurements. The worst day was 2026-05-28 with AQI 38.

How is Pasadena air quality measured?

Air quality in Pasadena 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 Pasadena, United States

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

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

Current AQI
Moderate Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

168h

PM2.5 Station

168h · 1 station

Temperature GFS model

27pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	PM10 avg	Hours	Stations
2026-05-28	38	8–66	9.5 µg/m³	28.0	24h	53
2026-05-27	22	12–28	5.2 µg/m³	14.6	24h	58
2026-05-26	26	20–39	6.2 µg/m³	20.6	24h	60
2026-05-25	36	28–46	8.6 µg/m³	16.9	24h	60
2026-05-24	28	20–38	6.6 µg/m³	13.1	24h	60
2026-05-23	27	19–35	6.4 µg/m³	13.8	24h	60
2026-05-22	28	18–40	6.8 µg/m³	19.1	24h	56

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