What is the air quality trend in Upland?

Over the past 15 days, Upland had an average AQI of 47 based on station measurements. The worst day was 2026-08-04 with AQI 54.

How is Upland air quality measured?

Air quality in Upland 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 Upland, United States

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

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

Current AQI
Moderate CAMS model

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

334h

PM2.5 Station

334h · 20 stations

Temperature GFS model

56pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	PM10 avg	Hours	Stations
2026-08-08	41	36–47	9.7 µg/m³	3.4	5h	20
2026-08-07	45	39–53	10.9 µg/m³	7.1	24h	19
2026-08-06	52	40–68	13.1 µg/m³	9.0	24h	19
2026-08-05	52	40–70	13.2 µg/m³	9.9	24h	18
2026-08-04	54	39–102	14.2 µg/m³	10.0	24h	18
2026-08-03	49	36–58	12.1 µg/m³	9.6	24h	18
2026-08-02	46	40–55	11.0 µg/m³	7.7	24h	18
2026-08-01	51	45–56	12.3 µg/m³	8.9	24h	19
2026-07-31	51	40–59	12.7 µg/m³	10.8	24h	18
2026-07-30	50	38–58	12.4 µg/m³	9.7	24h	18
2026-07-29	48	37–55	11.6 µg/m³	8.8	24h	19
2026-07-28	43	34–53	10.3 µg/m³	6.5	24h	19
2026-07-27	42	32–54	10.0 µg/m³	6.6	24h	20
2026-07-26	44	41–47	10.6 µg/m³	7.9	24h	20
2026-07-25	43	35–52	10.3 µg/m³	7.2	17h	20

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