What is the air quality trend in South Pasadena?

Over the past 14 days, South Pasadena had an average AQI of 38 based on station measurements. The worst day was 2026-05-19 with AQI 70.

How is South Pasadena air quality measured?

Air quality in South 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 South Pasadena, United States

Name: South 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 South Pasadena, United States.

Current AQI
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

308h

PM2.5 Station

308h · 1 station

Temperature GFS model

56pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	PM10 avg	Hours	Stations
2026-05-30	10	4–38	2.4 µg/m³	2.9	20h	1
2026-05-29	5	4–8	1.2 µg/m³	1.4	12h	1
2026-05-28	6	4–17	1.4 µg/m³	1.6	16h	1
2026-05-27	8	4–17	2.0 µg/m³	2.7	22h	1
2026-05-26	17	8–25	4.1 µg/m³	4.8	24h	1
2026-05-25	23	12–42	5.5 µg/m³	6.1	24h	1
2026-05-24	52	33–70	13.7 µg/m³	14.6	24h	1
2026-05-23	56	33–80	14.8 µg/m³	16.5	24h	1
2026-05-22	53	25–74	14.6 µg/m³	15.9	22h	1
2026-05-21	51	25–76	13.3 µg/m³	14.9	24h	1
2026-05-20	64	8–119	20.1 µg/m³	21.8	24h	1
2026-05-19	70	17–99	22.0 µg/m³	24.3	24h	1
2026-05-18	64	50–89	18.5 µg/m³	20.9	24h	1
2026-05-17	61	33–95	17.4 µg/m³	19.4	24h	1

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