What is the air quality trend in Columbia?

Over the past 8 days, Columbia had an average AQI of 77 based on station measurements. The worst day was 2026-07-17 with AQI 165.

How is Columbia air quality measured?

Air quality in Columbia 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 Columbia, United States

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

Historical PM2.5 and AQI trend from monitoring stations near Columbia, United States.

Current AQI
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

167h

PM2.5 Station

167h · 2 stations

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-07-22	28	28–28	6.6 µg/m³	1h	2
2026-07-21	52	28–74	14.3 µg/m³	24h	27
2026-07-20	69	58–82	20.7 µg/m³	24h	26
2026-07-19	60	36–90	17.6 µg/m³	24h	28
2026-07-18	130	58–156	49.5 µg/m³	24h	28
2026-07-17	165	58–223	97.8 µg/m³	24h	29
2026-07-16	61	34–152	16.7 µg/m³	24h	28
2026-07-15	52	43–85	13.1 µg/m³	22h	29

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