What is the air quality trend in Uiju?

Over the past 21 days, Uiju had an average AQI of 66 based on station measurements. The worst day was 2026-05-12 with AQI 100.

How is Uiju air quality measured?

Air quality in Uiju 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 Uiju, Korea, Democratic People's Republic of

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

Historical PM2.5 and AQI trend from monitoring stations near Uiju, Korea, Democratic People's Republic of.

Current AQI
Moderate Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

428h

PM2.5 Station

428h · 4 stations

Temperature GFS model

80pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-05-29	68	40–104	20.4 µg/m³	15h	2
2026-05-28	70	32–152	21.4 µg/m³	23h	3
2026-05-27	77	32–116	24.6 µg/m³	21h	3
2026-05-26	64	31–80	18.7 µg/m³	23h	3
2026-05-25	65	34–90	19.1 µg/m³	20h	3
2026-05-24	59	36–164	17.1 µg/m³	22h	3
2026-05-23	62	25–109	18.2 µg/m³	21h	3
2026-05-22	51	25–91	13.9 µg/m³	21h	2
2026-05-21	65	25–288	25.8 µg/m³	22h	3
2026-05-20	74	18–500	39.5 µg/m³	24h	3
2026-05-19	61	27–97	17.5 µg/m³	24h	4
2026-05-18	58	29–112	16.3 µg/m³	23h	3
2026-05-17	51	16–74	13.2 µg/m³	20h	4
2026-05-16	64	33–104	18.5 µg/m³	17h	3
2026-05-15	60	25–118	17.6 µg/m³	22h	2
2026-05-14	69	35–133	20.7 µg/m³	21h	3
2026-05-13	65	33–153	19.3 µg/m³	22h	2
2026-05-12	100	43–399	44.5 µg/m³	21h	2
2026-05-11	85	36–141	27.8 µg/m³	21h	3
2026-05-10	74	45–107	23.3 µg/m³	22h	3
2026-05-09	60	42–78	17.0 µg/m³	3h	1

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