What is the air quality trend in Hwaseong-si?

Over the past 15 days, Hwaseong-si had an average AQI of 54 based on station measurements. The worst day was 2026-05-30 with AQI 75.

How is Hwaseong-si air quality measured?

Air quality in Hwaseong-si 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 Hwaseong-si, South Korea

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

Historical PM2.5 and AQI trend from monitoring stations near Hwaseong-si, South Korea.

Current AQI
Moderate Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

337h

PM2.5 Station

337h · 20 stations

Temperature GFS model

56pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-05-30	75	63–85	23.4 µg/m³	11h	105
2026-05-29	63	50–83	17.9 µg/m³	24h	109
2026-05-28	54	29–79	14.6 µg/m³	24h	106
2026-05-27	35	29–41	8.5 µg/m³	24h	105
2026-05-26	49	25–59	12.2 µg/m³	24h	109
2026-05-25	57	30–67	15.2 µg/m³	24h	127
2026-05-24	60	29–71	16.4 µg/m³	24h	114
2026-05-23	54	44–61	13.8 µg/m³	24h	118
2026-05-22	50	38–58	12.4 µg/m³	24h	124
2026-05-21	37	31–44	8.9 µg/m³	24h	124
2026-05-20	42	32–84	10.4 µg/m³	24h	126
2026-05-19	65	42–77	18.7 µg/m³	24h	131
2026-05-18	68	63–71	20.4 µg/m³	24h	133
2026-05-17	62	27–82	17.5 µg/m³	24h	147
2026-05-16	52	15–80	13.9 µg/m³	14h	122

Back to Hwaseong-si Air Quality