What is the air quality trend in Hongch’ŏn?

Over the past 8 days, Hongch’ŏn had an average AQI of 52 based on station measurements. The worst day was 2026-06-03 with AQI 61.

How is Hongch’ŏn air quality measured?

Air quality in Hongch’ŏn 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 Hongch’ŏn, South Korea

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

Historical PM2.5 and AQI trend from monitoring stations near Hongch’ŏn, 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 · 12 stations

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-06-09	58	51–65	15.2 µg/m³	9h	16
2026-06-08	54	39–62	13.7 µg/m³	24h	19
2026-06-07	46	31–60	11.3 µg/m³	24h	18
2026-06-06	46	34–58	11.2 µg/m³	24h	20
2026-06-05	43	30–57	10.4 µg/m³	24h	20
2026-06-04	50	29–70	12.8 µg/m³	24h	18
2026-06-03	61	28–73	17.1 µg/m³	24h	20
2026-06-02	60	54–67	16.3 µg/m³	14h	20

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