What is the air quality trend in Cheonan?

Over the past 8 days, Cheonan had an average AQI of 48 based on station measurements. The worst day was 2026-07-16 with AQI 56.

How is Cheonan air quality measured?

Air quality in Cheonan 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 Cheonan, South Korea

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

Historical PM2.5 and AQI trend from monitoring stations near Cheonan, South Korea.

Current AQI
Moderate Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

167h

PM2.5 Station

167h · 46 stations

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-07-22	49	38–59	12.3 µg/m³	4h	41
2026-07-21	47	30–82	12.0 µg/m³	24h	64
2026-07-20	41	22–52	9.8 µg/m³	24h	51
2026-07-19	47	24–60	11.7 µg/m³	24h	47
2026-07-18	44	24–58	10.8 µg/m³	24h	49
2026-07-17	55	28–68	14.6 µg/m³	24h	37
2026-07-16	56	25–80	15.3 µg/m³	24h	41
2026-07-15	47	32–64	11.9 µg/m³	19h	33

Back to Cheonan Air Quality