What is the air quality trend in Rialto?

Over the past 15 days, Rialto had an average AQI of 49 based on station measurements. The worst day was 2026-08-04 with AQI 68.

How is Rialto air quality measured?

Air quality in Rialto 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 Rialto, United States

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

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

Current AQI
Moderate CAMS model

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

333h

PM2.5 Station

333h · 10 stations

Temperature GFS model

56pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-08-08	50	44–55	12.4 µg/m³	2h	9
2026-08-07	51	32–93	13.7 µg/m³	24h	8
2026-08-06	53	30–119	14.2 µg/m³	24h	9
2026-08-05	62	28–130	18.6 µg/m³	24h	9
2026-08-04	68	26–155	21.6 µg/m³	24h	10
2026-08-03	47	29–84	12.0 µg/m³	24h	8
2026-08-02	42	20–55	10.1 µg/m³	24h	8
2026-08-01	48	32–57	11.9 µg/m³	24h	8
2026-07-31	45	32–55	11.0 µg/m³	24h	9
2026-07-30	47	29–69	11.8 µg/m³	24h	8
2026-07-29	47	36–62	11.7 µg/m³	24h	9
2026-07-28	57	26–179	18.4 µg/m³	24h	9
2026-07-27	41	28–59	9.8 µg/m³	24h	8
2026-07-26	41	30–51	9.8 µg/m³	24h	10
2026-07-25	44	30–58	10.6 µg/m³	19h	10

Back to Rialto Air Quality