What is the air quality trend in Cổ Đô?

Over the past 8 days, Cổ Đô had an average AQI of 92 based on station measurements. The worst day was 2026-10-14 with AQI 147.

How is Cổ Đô air quality measured?

Air quality in Cổ Đô 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 Cổ Đô, Vietnam

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

Historical PM2.5 and AQI trend from monitoring stations near Cổ Đô, Vietnam.

Current AQI
Moderate Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

165h

PM2.5 Station

165h · 9 stations

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	PM10 avg	Hours	Stations
2026-10-20	66	54–96	19.4 µg/m³	38.9	18h	7
2026-10-19	56	43–67	14.8 µg/m³	35.1	24h	6
2026-10-18	69	52–111	20.5 µg/m³	37.7	24h	7
2026-10-17	79	53–135	25.1 µg/m³	45.5	24h	7
2026-10-16	92	65–136	31.1 µg/m³	54.1	24h	6
2026-10-15	110	77–155	39.4 µg/m³	62.2	24h	7
2026-10-14	147	120–164	58.9 µg/m³	94.3	24h	7
2026-10-13	121	112–128	43.7 µg/m³	83.2	3h	7

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