What is the air quality trend in West Lake Sammamish?

Over the past 8 days, West Lake Sammamish had an average AQI of 11 based on station measurements. The worst day was 2026-05-24 with AQI 17.

How is West Lake Sammamish air quality measured?

Air quality in West Lake Sammamish 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 West Lake Sammamish, United States

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

Historical PM2.5 and AQI trend from monitoring stations near West Lake Sammamish, 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 · 1 station

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-05-29	12	8–17	2.9 µg/m³	20h	1
2026-05-28	12	8–21	2.8 µg/m³	24h	1
2026-05-27	9	8–13	2.1 µg/m³	24h	1
2026-05-26	9	8–13	2.2 µg/m³	24h	1
2026-05-25	12	8–21	2.9 µg/m³	24h	1
2026-05-24	17	13–21	4.0 µg/m³	24h	1
2026-05-23	13	8–21	3.1 µg/m³	24h	1
2026-05-22	8	8–8	2.0 µg/m³	3h	1

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