What is the air quality trend in Heunghae?

Over the past 15 days, Heunghae had an average AQI of 52 based on station measurements. The worst day was 2026-05-18 with AQI 64.

How is Heunghae air quality measured?

Air quality in Heunghae 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 Heunghae, South Korea

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

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

Current AQI
Moderate Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

331h

PM2.5 Station

331h · 16 stations

Temperature GFS model

56pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-05-30	60	53–71	16.3 µg/m³	10h	15
2026-05-29	62	51–73	17.3 µg/m³	24h	14
2026-05-28	53	26–91	15.0 µg/m³	24h	14
2026-05-27	37	27–47	8.8 µg/m³	24h	14
2026-05-26	49	20–66	12.7 µg/m³	24h	13
2026-05-25	55	12–71	14.8 µg/m³	24h	14
2026-05-24	58	19–74	15.7 µg/m³	24h	16
2026-05-23	54	38–67	14.2 µg/m³	24h	13
2026-05-22	48	28–64	11.9 µg/m³	24h	13
2026-05-21	35	23–44	8.5 µg/m³	24h	13
2026-05-20	38	27–52	9.1 µg/m³	24h	14
2026-05-19	63	24–87	18.4 µg/m³	24h	14
2026-05-18	64	46–83	18.5 µg/m³	24h	14
2026-05-17	59	12–82	16.4 µg/m³	23h	14
2026-05-16	59	45–89	16.4 µg/m³	10h	16

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