What is the air quality trend in Wŏnju?

Over the past 8 days, Wŏnju had an average AQI of 47 based on station measurements. The worst day was 2026-07-17 with AQI 58.

How is Wŏnju air quality measured?

Air quality in Wŏnju 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 Wŏnju, South Korea

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

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

Current AQI
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

167h

PM2.5 Station

167h · 2 stations

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-07-22	37	13–53	9.1 µg/m³	7h	17
2026-07-21	44	17–81	11.2 µg/m³	24h	27
2026-07-20	40	21–50	9.6 µg/m³	24h	24
2026-07-19	46	17–69	11.4 µg/m³	24h	22
2026-07-18	45	31–58	10.9 µg/m³	24h	23
2026-07-17	58	38–86	15.9 µg/m³	24h	14
2026-07-16	54	20–97	14.4 µg/m³	24h	17
2026-07-15	52	27–88	13.5 µg/m³	16h	11

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