What is the air quality trend in Bellingham?

Over the past 8 days, Bellingham had an average AQI of 42 based on station measurements. The worst day was 2026-05-24 with AQI 53.

How is Bellingham air quality measured?

Air quality in Bellingham 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 Bellingham, United States

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

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

Current AQI
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

168h

PM2.5 Station

168h · 5 stations

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-05-28	26	17–69	6.5 µg/m³	23h	12
2026-05-27	49	16–189	16.9 µg/m³	24h	13
2026-05-26	39	13–89	10.1 µg/m³	24h	12
2026-05-25	52	16–138	14.6 µg/m³	24h	15
2026-05-24	53	20–154	15.2 µg/m³	24h	16
2026-05-23	42	17–150	11.4 µg/m³	24h	13
2026-05-22	34	15–62	8.3 µg/m³	24h	11
2026-05-21	48	48–48	11.5 µg/m³	1h	12

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