SmogRank / United States / Washington / Liberty Lake
Liberty Lake, month by month
Liberty Lake has a measured daily mean on 343 days since 3 October 2025. Its worst month was August 2026, at 81 US AQI (25.1 µg/m³), 163rd of 2,896 cities on that month's world ranking. Its cleanest was June 2026, at 13 US AQI (2.4 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
2 months
| Month | Why |
|---|---|
| Oct 2026 | 7 of 11 days measured; a month needs 8. The others: 1 with no readings from the monitor, 3 with readings for part of the day (a day needs 18 hours). |
| Nov 2025 | 17 of 30 days measured; a month needs 21. The others: 13 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.
Liberty Lake's worst months
| Month | US AQI | World rank | Episode |
|---|---|---|---|
| August 2026 | 8125.1 µg/m³ | 163rdof 2,896 | North-western United States and Canada, 4 to 22 August 2026 North-western United States and Canada, July and August 2026 |
| July 2026 | 6114.5 µg/m³ | 551stof 2,784 | North-western United States and Canada, July and August 2026 |
| January 2026 | 366.5 µg/m³ | 1,956thof 2,617 | – |
| October 2025 | 325.8 µg/m³ | 1,693rdof 2,614 | Washington and Idaho, United States, October 2025 |
| April 2026 | 244.4 µg/m³ | 2,629thof 2,941 | – |
| September 2026 | 244.4 µg/m³ | 2,597thof 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.
Liberty Lake's worst days
Daily means, the highest since 3 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, Liberty Lake, United States, 3 Oct 2025 – 10 Oct 2026. Monitor data from AirNow, via OpenAQ and from the publisher directly; sources listed at smogrank.com/sources. smogrank.com/us/liberty-lake/history (accessed 12 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.
Liberty Lake now: the last 24 hours, its ranks today and the last 12 months day by day.
Updated 2026-10-12 20:07 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).