What is the air quality trend in Cheonan?

Over the past 8 days, Cheonan had an average AQI of 55 based on station measurements. The worst day was 2026-05-30 with AQI 70.

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 · 50 stations

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-05-30	70	58–80	21.0 µg/m³	9h	51
2026-05-29	62	53–84	17.4 µg/m³	24h	51
2026-05-28	54	34–87	14.7 µg/m³	24h	48
2026-05-27	33	26–43	8.0 µg/m³	24h	49
2026-05-26	49	18–61	12.3 µg/m³	24h	46
2026-05-25	57	35–70	15.3 µg/m³	24h	54
2026-05-24	59	31–68	16.3 µg/m³	24h	52
2026-05-23	56	51–63	14.6 µg/m³	14h	51

Back to Cheonan Air Quality