What is the air quality trend in Pekin?

Over the past 8 days, Pekin had an average AQI of 59 based on station measurements. The worst day was 2026-07-18 with AQI 83.

How is Pekin air quality measured?

Air quality in Pekin 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 Pekin, United States

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

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

Current AQI
Moderate Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

104h

PM2.5 Station

104h · 1 station

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-07-21	49	23–67	13.1 µg/m³	12h	1
2026-07-20	63	20–157	21.4 µg/m³	11h	1
2026-07-19	52	17–117	14.6 µg/m³	16h	1
2026-07-18	83	25–247	37.9 µg/m³	13h	1
2026-07-17	71	17–214	32.9 µg/m³	17h	1
2026-07-16	76	34–322	32.4 µg/m³	19h	1
2026-07-15	43	15–78	11.1 µg/m³	15h	1
2026-07-14	35	35–35	8.4 µg/m³	1h	1

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