SmogRank / Australia / New South Wales / Muswellbrook
Muswellbrook, month by month
Muswellbrook has a measured daily mean on 1,297 days since 1 January 2023. Its worst month was June 2025, at 57 US AQI (12.1 µg/m³), 792nd of 2,508 cities on that month's world ranking. Its cleanest was March 2025, at 30 US AQI (5.4 µg/m³). 2025 averaged 44 US AQI (7.9 µg/m³), against 44 US AQI (8.0 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
Muswellbrook's worst months
| Month | US AQI | World rank |
|---|---|---|
| June 2025 | 5712.1 µg/m³ | 792ndof 2,508 |
| July 2023 | 5511.0 µg/m³ | 538thof 1,432 |
| August 2023 | 5410.7 µg/m³ | 487thof 1,980 |
| June 2024 | 5410.5 µg/m³ | 548thof 2,563 |
| September 2023 | 5310.3 µg/m³ | 540thof 2,176 |
| June 2023 | 5310.2 µg/m³ | 756thof 1,603 |
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.
Muswellbrook's worst days
| Day | US AQI |
|---|---|
| 1 Feb 2026 | 10436.8 µg/m³ |
| 31 Jan 2026 | 8326.4 µg/m³ |
| 19 Dec 2023 | 8125.0 µg/m³ |
| 21 Jun 2025 | 7622.3 µg/m³ |
| 30 Jul 2024 | 7320.8 µg/m³ |
| 9 Dec 2025 | 7220.6 µg/m³ |
| 20 Jun 2025 | 7220.4 µg/m³ |
| 22 Jun 2025 | 7119.9 µg/m³ |
| 5 Jul 2025 | 7119.7 µg/m³ |
| 25 Jun 2024 | 7119.6 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, Muswellbrook, Australia, 1 Jan 2023 – 12 Oct 2026. Monitor data from NSW DCCEEW, read from the publisher; sources listed at smogrank.com/sources. smogrank.com/au/muswellbrook/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.
Muswellbrook 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).