What is the air quality trend in DeKalb?

Over the past 15 days, DeKalb had an average AQI of 52 based on station measurements. The worst day was 2026-07-16 with AQI 101.

How is DeKalb air quality measured?

Air quality in DeKalb 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 DeKalb, United States

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

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

Current AQI
Good CAMS model

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

288h

PM2.5 Station

288h · 1 station

Temperature GFS model

56pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-07-22	34	18–49	8.2 µg/m³	3h	1
2026-07-21	50	23–106	13.6 µg/m³	16h	2
2026-07-20	78	7–156	25.9 µg/m³	20h	2
2026-07-19	70	26–193	27.7 µg/m³	16h	2
2026-07-18	74	26–165	24.6 µg/m³	19h	2
2026-07-17	67	21–213	25.6 µg/m³	22h	2
2026-07-16	101	26–172	37.9 µg/m³	22h	2
2026-07-15	67	36–173	21.3 µg/m³	23h	2
2026-07-14	44	24–64	10.8 µg/m³	22h	2
2026-07-13	37	24–56	9.0 µg/m³	23h	2
2026-07-12	36	9–71	9.0 µg/m³	20h	2
2026-07-11	34	13–54	8.2 µg/m³	22h	2
2026-07-10	26	10–39	6.4 µg/m³	20h	2
2026-07-09	35	10–78	8.7 µg/m³	20h	2
2026-07-08	32	10–60	8.0 µg/m³	20h	2

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