What is the air quality trend in South Chicago?

Over the past 15 days, South Chicago had an average AQI of 33 based on station measurements. The worst day was 2026-05-24 with AQI 52.

How is South Chicago air quality measured?

Air quality in South Chicago 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 South Chicago, United States

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

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

Current AQI
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

335h

PM2.5 Station

335h · 7 stations

Temperature GFS model

56pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-05-29	25	18–39	5.9 µg/m³	20h	267
2026-05-28	28	22–39	6.6 µg/m³	24h	258
2026-05-27	43	30–58	10.6 µg/m³	24h	280
2026-05-26	33	26–43	7.9 µg/m³	24h	280
2026-05-25	49	31–72	12.9 µg/m³	24h	280
2026-05-24	52	38–58	13.0 µg/m³	24h	281
2026-05-23	28	21–37	6.6 µg/m³	24h	279
2026-05-22	24	20–28	5.6 µg/m³	24h	270
2026-05-21	22	15–39	5.2 µg/m³	24h	280
2026-05-20	18	16–25	4.4 µg/m³	24h	281
2026-05-19	25	17–40	6.0 µg/m³	24h	280
2026-05-18	43	18–52	10.2 µg/m³	24h	279
2026-05-17	48	32–60	12.3 µg/m³	24h	279
2026-05-16	35	27–51	8.3 µg/m³	24h	278
2026-05-15	26	25–27	6.2 µg/m³	3h	279

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