What is the air quality trend in Katihar?

Over the past 8 days, Katihar had an average AQI of 129 based on station measurements. The worst day was 2026-10-21 with AQI 140.

How is Katihar air quality measured?

Air quality in Katihar 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 Katihar, India

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

Historical PM2.5 and AQI trend from monitoring stations near Katihar, India.

109

Current AQI
Unhealthy for sensitive groups CAMS model

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

164h

PM2.5 Station

164h · 3 stations

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-10-21	140	139–140	51.3 µg/m³	4h	3
2026-10-20	135	127–149	49.3 µg/m³	24h	3
2026-10-19	132	127–135	47.9 µg/m³	24h	3
2026-10-18	134	129–139	48.9 µg/m³	24h	3
2026-10-17	135	131–141	49.2 µg/m³	24h	3
2026-10-16	128	123–131	46.5 µg/m³	24h	3
2026-10-15	117	114–122	42.2 µg/m³	23h	3
2026-10-14	117	115–121	41.8 µg/m³	17h	3

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