What is the air quality trend in Nonsan?

Over the past 8 days, Nonsan had an average AQI of 41 based on station measurements. The worst day was 2026-10-21 with AQI 53.

How is Nonsan air quality measured?

Air quality in Nonsan 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 Nonsan, South Korea

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

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

Current AQI
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

166h

PM2.5 Station

166h · 10 stations

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-10-21	53	48–58	13.4 µg/m³	2h	18
2026-10-20	41	23–53	9.8 µg/m³	24h	32
2026-10-19	38	19–53	9.0 µg/m³	24h	41
2026-10-18	36	23–56	8.7 µg/m³	24h	32
2026-10-17	43	16–65	10.8 µg/m³	24h	30
2026-10-16	51	12–67	13.3 µg/m³	24h	42
2026-10-15	37	22–46	8.9 µg/m³	24h	36
2026-10-14	33	21–48	7.9 µg/m³	20h	42

Back to Nonsan Air Quality