What is the air quality trend in Yorba Linda?

Over the past 8 days, Yorba Linda had an average AQI of 41 based on station measurements. The worst day was 2026-07-20 with AQI 47.

How is Yorba Linda air quality measured?

Air quality in Yorba Linda 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 Yorba Linda, United States

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

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

Current AQI
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

168h

PM2.5 Station

168h · 2 stations

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	PM10 avg	Hours	Stations
2026-07-21	36	16–52	8.6 µg/m³	4.1	22h	98
2026-07-20	47	42–53	11.4 µg/m³	7.1	24h	99
2026-07-19	46	30–53	11.2 µg/m³	7.9	24h	103
2026-07-18	40	35–44	9.6 µg/m³	5.4	24h	104
2026-07-17	44	35–53	10.6 µg/m³	9.5	24h	108
2026-07-16	40	35–45	9.6 µg/m³	5.6	24h	100
2026-07-15	39	32–46	9.4 µg/m³	5.3	24h	105
2026-07-14	36	35–38	8.7 µg/m³	8.3	2h	54

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