What is the air quality trend in Hoàn Kiếm?

Over the past 21 days, Hoàn Kiếm had an average AQI of 63 based on station measurements. The worst day was 2026-05-31 with AQI 110.

How is Hoàn Kiếm air quality measured?

Air quality in Hoàn Kiếm 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 Hoàn Kiếm, Vietnam

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

Historical PM2.5 and AQI trend from monitoring stations near Hoàn Kiếm, Vietnam.

Current AQI
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

473h

PM2.5 Station

473h · 3 stations

Temperature GFS model

80pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	PM10 avg	Hours	Stations
2026-06-08	28	14–70	6.9 µg/m³	9.8	21h	3
2026-06-07	37	7–127	10.2 µg/m³	14.7	24h	3
2026-06-06	47	17–92	13.4 µg/m³	17.3	24h	3
2026-06-05	75	56–117	23.4 µg/m³	29.6	24h	3
2026-06-04	76	18–170	27.3 µg/m³	33.7	24h	2
2026-06-03	74	34–152	23.0 µg/m³	30.0	24h	3
2026-06-02	73	51–110	22.7 µg/m³	29.1	24h	3
2026-06-01	71	52–106	21.5 µg/m³	26.5	21h	3
2026-05-31	110	65–153	39.0 µg/m³	47.4	24h	3
2026-05-30	69	45–87	20.6 µg/m³	25.6	24h	3
2026-05-29	106	45–176	41.5 µg/m³	57.6	24h	3
2026-05-28	42	21–59	10.2 µg/m³	14.0	24h	3
2026-05-27	53	10–116	15.7 µg/m³	21.6	23h	3
2026-05-26	64	24–163	21.4 µg/m³	29.0	24h	3
2026-05-25	65	8–173	24.8 µg/m³	33.6	24h	2
2026-05-24	66	16–166	23.5 µg/m³	33.8	24h	2
2026-05-23	62	33–135	17.9 µg/m³	24.8	24h	2
2026-05-22	75	51–103	23.4 µg/m³	31.7	22h	2
2026-05-21	59	41–92	16.3 µg/m³	22.5	24h	2
2026-05-20	50	31–70	12.6 µg/m³	15.1	24h	2
2026-05-19	22	19–25	5.2 µg/m³	5.9	2h	2

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