What is the air quality trend in Norco?

Over the past 8 days, Norco had an average AQI of 50 based on station measurements. The worst day was 2026-08-04 with AQI 66.

How is Norco air quality measured?

Air quality in Norco 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 Norco, United States

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

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

Current AQI
Moderate CAMS model

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

166h

PM2.5 Station

166h · 9 stations

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-08-08	44	36–53	10.7 µg/m³	4h	8
2026-08-07	50	31–104	13.7 µg/m³	24h	7
2026-08-06	52	33–89	13.7 µg/m³	24h	8
2026-08-05	58	29–99	16.7 µg/m³	24h	8
2026-08-04	66	29–153	20.2 µg/m³	24h	8
2026-08-03	45	28–74	11.3 µg/m³	24h	7
2026-08-02	41	21–58	10.0 µg/m³	24h	7
2026-08-01	47	32–55	11.6 µg/m³	18h	7

Back to Norco Air Quality