What is the air quality trend in Merced?

Over the past 15 days, Merced had an average AQI of 51 based on station measurements. The worst day was 2026-08-06 with AQI 104.

How is Merced air quality measured?

Air quality in Merced 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 Merced, United States

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

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

Current AQI
Good CAMS model

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

275h

PM2.5 Station

275h · 1 station

Temperature GFS model

56pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-08-08	51	51–51	12.1 µg/m³	1h	1
2026-08-07	48	30–112	12.5 µg/m³	20h	2
2026-08-06	104	30–199	45.2 µg/m³	14h	2
2026-08-05	69	18–142	21.7 µg/m³	11h	1
2026-08-04	61	30–174	19.8 µg/m³	19h	2
2026-08-03	41	9–63	10.1 µg/m³	19h	2
2026-08-02	42	18–62	10.4 µg/m³	22h	2
2026-08-01	48	17–84	12.7 µg/m³	24h	2
2026-07-31	52	33–103	13.8 µg/m³	21h	2
2026-07-30	53	13–102	15.1 µg/m³	19h	2
2026-07-29	37	20–63	8.9 µg/m³	22h	2
2026-07-28	42	22–70	10.4 µg/m³	24h	2
2026-07-27	39	17–55	9.5 µg/m³	21h	2
2026-07-26	41	16–117	10.8 µg/m³	21h	2
2026-07-25	48	14–87	12.7 µg/m³	17h	2

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