SmogRank / United States / Idaho / Pocatello
Pocatello, month by month
Pocatello has a measured daily mean on 1,236 days since 1 January 2023. Its worst month was July 2024, at 61 US AQI (14.2 µg/m³), 214th of 2,566 cities on that month's world ranking. Its cleanest was February 2024, at 11 US AQI (2.0 µg/m³). 2025 averaged 30 US AQI (5.4 µg/m³), against 36 US AQI (6.5 µg/m³) in 2024.
Every month since 2023
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
4 months
| Month | Why |
|---|---|
| Jan 2025 | 20 of 31 days measured; a month needs 22. The others: 11 with under 18 hours of readings or readings that failed our checks. |
| Jun 2023 | 16 of 30 days measured; a month needs 21. The others: 14 with under 18 hours of readings or readings that failed our checks. |
| Mar 2023 | 11 of 31 days measured; a month needs 22. The others: 20 missing from OpenAQ's archive. |
| Feb 2023 | 3 of 28 days measured; a month needs 20. The others: 25 missing from OpenAQ's archive. |
A day counts once 18 hours of it are measured; a month needs 70% of its days.
Pocatello's worst months
| Month | US AQI | World rank | Episode |
|---|---|---|---|
| July 2024 | 6114.2 µg/m³ | 214thof 2,566 | North-western United States and Canada, July 2024 |
| August 2026 | 5611.8 µg/m³ | 585thof 2,896 | North-western United States and Canada, 4 to 22 August 2026 North-western United States and Canada, July and August 2026 |
| August 2024 | 5511.2 µg/m³ | 422ndof 2,010 | Oregon, Idaho and Utah, United States, August 2024 |
| July 2026 | 519.2 µg/m³ | 1,562ndof 2,784 | North-western United States and Canada, July and August 2026 |
| September 2024 | 478.5 µg/m³ | 704thof 2,010 | North-western United States and Canada, 4 to 11 September 2024 |
| January 2026 | 478.5 µg/m³ | 1,358thof 2,617 | – |
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.
Pocatello's worst days
| Day | US AQI | Episode |
|---|---|---|
| 27 Jul 2026 | 15459.2 µg/m³ | North-western United States and Canada, July and August 2026 |
| 2 Aug 2026 | 13549.3 µg/m³ | North-western United States and Canada, July and August 2026 |
| 30 Jan 2025 | 11139.4 µg/m³ | – |
| 29 Nov 2023 | 11039.1 µg/m³ | Utah and Idaho, United States, November 2023 |
| 4 Sept 2024 | 10235.8 µg/m³ | North-western United States and Canada, 4 to 11 September 2024 |
| 29 Jul 2024 | 10135.5 µg/m³ | North-western United States and Canada, July 2024 |
| 26 Jul 2024 | 9834.5 µg/m³ | North-western United States and Canada, July 2024 |
| 7 Aug 2024 | 8929.5 µg/m³ | Oregon, Idaho and Utah, United States, August 2024 |
| 30 Jul 2024 | 8627.8 µg/m³ | North-western United States and Canada, July 2024 |
| 9 Aug 2026 | 8627.8 µg/m³ | North-western United States and Canada, 4 to 22 August 2026 |
Daily means, the highest since 1 Jan 2023; 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, Pocatello, United States, 1 Jan 2023 – 8 Oct 2026. Monitor data from AirNow, via OpenAQ and from the publisher directly; sources listed at smogrank.com/sources. smogrank.com/us/pocatello/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.
Pocatello now: the last 24 hours, its ranks today and the last 12 months day by day.
Updated 2026-10-12 22:07 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).