SmogRank / United States / Utah / North Ogden
North Ogden, month by month
North Ogden has a measured daily mean on 1,362 days since 1 January 2023. Its worst month was February 2023, at 57 US AQI (12.1 µg/m³), 534th of 1,129 cities on that month's world ranking. Its cleanest was March 2024, at 16 US AQI (2.8 µg/m³). 2025 averaged 32 US AQI (5.8 µg/m³), against 34 US AQI (6.2 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
1 month
| Month | Why |
|---|---|
| Nov 2025 | 20 of 30 days measured; a month needs 21. The others: 10 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.
North Ogden's worst months
| Month | US AQI | World rank | Episode |
|---|---|---|---|
| February 2023 | 5712.1 µg/m³ | 534thof 1,129 | Utah and Idaho, United States, February 2023 |
| July 2024 | 5410.5 µg/m³ | 631stof 2,566 | – |
| December 2024 | 519.2 µg/m³ | 1,021stof 2,616 | – |
| January 2026 | 498.9 µg/m³ | 1,266thof 2,617 | – |
| August 2024 | 488.7 µg/m³ | 962ndof 2,010 | Oregon, Idaho and Utah, United States, August 2024 |
| December 2023 | 478.5 µg/m³ | 1,105thof 2,247 | – |
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.
North Ogden's worst days
| Day | US AQI | Episode |
|---|---|---|
| 4 Feb 2023 | 14151.7 µg/m³ | Utah and Idaho, United States, February 2023 |
| 3 Feb 2023 | 13147.7 µg/m³ | Utah and Idaho, United States, February 2023 |
| 2 Feb 2023 | 10637.7 µg/m³ | Utah and Idaho, United States, February 2023 |
| 8 Aug 2024 | 9130.7 µg/m³ | Oregon, Idaho and Utah, United States, August 2024 |
| 5 Feb 2023 | 9030.0 µg/m³ | Utah and Idaho, United States, February 2023 |
| 11 Sept 2024 | 8527.6 µg/m³ | North-western United States and Canada, 4 to 11 September 2024 |
| 4 Sept 2024 | 8426.6 µg/m³ | North-western United States and Canada, 4 to 11 September 2024 |
| 28 Mar 2025 | 8125.4 µg/m³ | – |
| 5 Dec 2024 | 8125.0 µg/m³ | – |
| 20 May 2023 | 8024.9 µg/m³ | – |
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, North Ogden, United States, 1 Jan 2023 – 11 Oct 2026. Monitor data from AirNow, via OpenAQ and from the publisher directly; sources listed at smogrank.com/sources. smogrank.com/us/north-ogden/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.
North Ogden now: the last 24 hours, its ranks today and the last 12 months day by day.
Updated 2026-10-13 00:07 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).