SmogRank / United States / Washington / Grandview
Grandview, month by month
Grandview has a measured daily mean on 342 days since 21 October 2025. Its worst month was August 2026, at 69 US AQI (18.8 µg/m³), 269th of 2,896 cities on that month's world ranking. Its cleanest was April 2026, at 21 US AQI (3.8 µg/m³).
Every month since 2025
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
Months without a mean, and why
1 month
| Month | Why |
|---|---|
| Oct 2025 | 7 of 31 days measured; a month needs 22. The others: 4 with under 18 hours of readings or readings that failed our checks. |
A day counts once 18 hours of it are measured; a month needs 70% of its days.
Grandview's worst months
| Month | US AQI | World rank | Episode |
|---|---|---|---|
| August 2026 | 6918.8 µg/m³ | 269thof 2,896 | North-western United States and Canada, 4 to 22 August 2026 North-western United States and Canada, July and August 2026 |
| January 2026 | 498.9 µg/m³ | 1,266thof 2,617 | – |
| July 2026 | 458.1 µg/m³ | 1,848thof 2,784 | North-western United States and Canada, July and August 2026 |
| November 2025 | 448.0 µg/m³ | 1,544thof 2,715 | – |
| September 2026 | 325.8 µg/m³ | 1,896thof 2,997 | – |
| December 2025 | 295.3 µg/m³ | 2,628thof 3,006 | – |
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.
Grandview's worst days
Daily means, the highest since 21 Oct 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, Grandview, United States, 21 Oct 2025 – 11 Oct 2026. Monitor data from AirNow, via OpenAQ and from the publisher directly; sources listed at smogrank.com/sources. smogrank.com/us/grandview-washington/history (accessed 13 Oct 2026).
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.
Grandview now: the last 24 hours, its ranks today and the last 12 months day by day.
Updated 2026-10-13 01:07 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).