What is the air quality trend in Upland?

Over the past 14 days, Upland had an average AQI of 40 based on station measurements. The worst day was 2026-07-10 with AQI 56.

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
Good CAMS model

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

335h

PM2.5 Station

335h · 2 stations

Temperature GFS model

56pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	PM10 avg	Hours	Stations
2026-07-21	33	9–44	7.9 µg/m³	4.1	23h	18
2026-07-20	44	12–54	10.6 µg/m³	7.1	24h	18
2026-07-19	45	22–55	10.9 µg/m³	7.9	24h	19
2026-07-18	36	27–42	8.6 µg/m³	5.4	24h	19
2026-07-17	44	36–56	10.7 µg/m³	9.5	24h	20
2026-07-16	37	28–48	8.8 µg/m³	5.6	24h	19
2026-07-15	35	20–42	8.3 µg/m³	5.3	24h	20
2026-07-14	38	32–46	9.0 µg/m³	6.1	24h	19
2026-07-13	45	39–54	10.9 µg/m³	8.1	24h	20
2026-07-12	39	21–45	9.5 µg/m³	7.9	24h	19
2026-07-11	47	30–54	11.4 µg/m³	10.6	24h	16
2026-07-10	56	48–62	14.5 µg/m³	16.3	24h	19
2026-07-09	40	17–54	9.7 µg/m³	9.0	24h	20
2026-07-08	29	24–38	6.9 µg/m³	4.1	24h	20

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