SmogRank / United States / Washington / Burien

Burien, month by month

Burien has a measured daily mean on 497 days since 10 May 2025. Its worst month was August 2026, at 43 US AQI (7.8 µg/m³), 1,715th of 2,896 cities on that month's world ranking. Its cleanest was June 2026, at 15 US AQI (2.7 µg/m³).

Every month since 2025

202626 so far274 days measured2,691st of 2,791 in the world
Jan36#1,956Feb21#2,752Mar19#2,879Apr24#2,656May22#2,649Jun15#2,457Jul21#2,717Aug43#1,715Sep26#2,483Oct32#1,886
2025too few days for a mean (a year needs 256)223 days measured
JanFebMarAprMay22#2,629Jun23#2,387Jul19#2,812Aug27#2,712Sep33#2,136Oct28#2,039Nov24#2,531Dec21#2,886
Each square is a month's mean PM2.5 in US AQI from Burien's measured days, with its place on that month's world ranking under it. A month has a mean once 70% of its days are measured, the rule the monthly rankings use; under that, the square gives the days measured. Each square opens that month's ranking with Burien marked; each year, the year's. A dashed square is the running month, so far.
Good0–50
Moderate51–100
Sensitive groups101–150
Unhealthy151–200
Very unhealthy201–300
Hazardous301+

The US EPA's Air Quality Index for PM2.5 (2024 breakpoints). Show values as: µg/m³ · US AQI · India AQI · China AQI · European AQI · UK DAQI · Canada AQHI+. About the scales

Burien's worst months

MonthUS AQIDays measuredWorld rankEpisode
August 2026 437.8 µg/m³28 of 311,715thof 2,896North-western United States and Canada, 4 to 22 August 2026
January 2026 366.5 µg/m³31 of 311,956thof 2,617–
September 2025 335.9 µg/m³30 of 302,136thof 3,104–
October 2025 285.0 µg/m³29 of 312,039thof 2,614–
August 2025 274.9 µg/m³31 of 312,712thof 2,901–
September 2026 264.7 µg/m³30 of 302,483rdof 2,981–

Monthly means over the days measured; finished months only. World rank: its place on that month's world ranking of every city with enough days. Each month opens that ranking.

Burien's worst days

DayUS AQIEpisode
6 Aug 2026 10035.4 µg/m³North-western United States and Canada, 4 to 22 August 2026
5 Aug 2026 9231.2 µg/m³North-western United States and Canada, 4 to 22 August 2026
4 Aug 2026 7622.4 µg/m³North-western United States and Canada, 4 to 22 August 2026
7 Aug 2026 6717.5 µg/m³North-western United States and Canada, 4 to 22 August 2026
1 Jan 2026 6416.3 µg/m³–
25 Jan 2026 6416.1 µg/m³–
3 Sept 2025 6114.7 µg/m³–
21 Jan 2026 6013.8 µg/m³–
22 Jul 2026 6013.8 µg/m³–
19 Jan 2026 5913.6 µg/m³–

Daily means, the highest since 10 May 2025; the WHO's daily guideline is 15 µg/m³. Each date opens that day's world ranking, and each episode the bad-air spell it was part of.

Use this history

SmogRank, PM2.5 monthly and daily means, Burien, United States, 10 May 2025 – 11 Oct 2026. Monitor data from AirNow, via OpenAQ and from the publisher directly; sources listed at smogrank.com/sources. smogrank.com/us/burien/history (accessed 12 Oct 2026).

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You're welcome to reuse a single chart, image or figure with this citation and a link. Terms. Raw monitor readings in bulk are published by OpenAQ, under each provider's licence.

Burien now: the last 24 hours, its ranks today and the last 12 months day by day.

Updated 2026-10-12 18:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the US AQI PM2.5 sub-index. Some low-cost readings: Sensor.Community, ODbL (data and licence). Some readings: Uzhydromet (Uzbekistan's Hydrometeorological Service); Department of Environment, Nepal; Vietnam's government monitors; Aurassure; Umhverfisstofnun (Environment Agency of Iceland); RMCAB (Secretaría Distrital de Ambiente, Bogotá); Love My Air (City and County of Denver), no reuse terms published (why we use them).