SmogRank / Australia / Queensland / Townsville

Townsville, month by month

Townsville has a measured daily mean on 1,128 days since 1 January 2023. Its worst month was September 2025, at 51 US AQI (9.3 µg/m³), 824th of 3,104 cities on that month's world ranking. Its cleanest was February 2025, at 23 US AQI (4.2 µg/m³). 2025 averaged 33 US AQI (6.0 µg/m³), against 32 US AQI (5.7 µg/m³) in 2024.

Every month since 2023

202632 so far200 days measured2,524th of 2,793 in the world

Jan29#2,292 Feb28#2,604 Mar34#2,509 Apr32#2,307 May36#1,810 Jun32#1,947Jul11 daysAugnoneSepnoneOct36#1,731

202533 for the year362 days measured2,360th of 2,681 in the world

Jan26#2,295 Feb23#2,503 Mar24#2,586 Apr28#2,558 May32#2,014 Jun29#2,276 Jul30#2,521 Aug33#2,510 Sep51#824 Oct47#750 Nov40#1,780 Dec33#2,474

202432 for the year336 days measured1,841st of 2,097 in the world

Jan26#2,133 Feb25#2,238Mar21 daysApr31#1,799 May29#2,202 Jun32#2,080 Jul29#2,190 Aug32#1,796 Sep46#757 Oct36#1,342 Nov33#2,017 Dec27#2,303

2023too few days for a mean (a year needs 256)230 days measured

Jan29#1,060Feb2 daysMar9 daysApr19 daysMay17 daysJun11 daysJul18 daysAug34#1,612 Sep47#937Oct20 daysNov36#1,566 Dec38#1,618

Each square is a month's mean PM2.5 in US AQI from Townsville's measured days, with its place on that month's world ranking under it. A month has a mean once 70% of its days are measured, the rule the monthly rankings use; under that, the square gives the days measured. Each square opens that month's ranking with Townsville marked; each year, the year's. A dashed square is the running month, so far.

Good0–50

Moderate51–100

Sensitive groups101–150

Unhealthy151–200

Very unhealthy201–300

Hazardous301+

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

11 months

Month	Why
Sep 2026	No day measured. The others: 30 with readings for part of the day (a day needs 18 hours).
Aug 2026	No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Jul 2026	11 of 31 days measured; a month needs 22. The others: 20 with under 18 hours of readings or readings that failed our checks.
Mar 2024	21 of 31 days measured; a month needs 22. The others: 10 with under 18 hours of readings or readings that failed our checks.
Oct 2023	20 of 31 days measured; a month needs 22. The others: 11 with under 18 hours of readings or readings that failed our checks.
Jul 2023	18 of 31 days measured; a month needs 22. The others: 1 missing from OpenAQ's archive, 12 with under 18 hours of readings or readings that failed our checks.
Jun 2023	11 of 30 days measured; a month needs 21. The others: 19 with under 18 hours of readings or readings that failed our checks.
May 2023	17 of 31 days measured; a month needs 22. The others: 14 with under 18 hours of readings or readings that failed our checks.
Apr 2023	19 of 30 days measured; a month needs 21. The others: 2 missing from OpenAQ's archive, 9 with under 18 hours of readings or readings that failed our checks.
Mar 2023	9 of 31 days measured; a month needs 22. The others: 19 missing from OpenAQ's archive, 3 with under 18 hours of readings or readings that failed our checks.
Feb 2023	2 of 28 days measured; a month needs 20. The others: 25 missing from OpenAQ's archive, 1 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.

Townsville's worst months

Month	US AQI	Days measured	World rank
September 2025	519.3 µg/m³	30 of 30	824thof 3,104
September 2023	478.5 µg/m³	30 of 30	937thof 2,176
October 2025	478.5 µg/m³	31 of 31	750thof 2,614
September 2024	468.3 µg/m³	30 of 30	757thof 2,010
November 2025	407.2 µg/m³	29 of 30	1,780thof 2,715
December 2023	386.8 µg/m³	27 of 31	1,618thof 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.

Townsville's worst days

Day	US AQI
12 Sept 2025	8426.8 µg/m³
2 Sept 2023	7421.2 µg/m³
4 Oct 2025	7220.4 µg/m³
29 Oct 2023	7120.0 µg/m³
26 Sept 2025	7119.9 µg/m³
27 Sept 2025	7119.7 µg/m³
28 Oct 2023	6617.1 µg/m³
5 Nov 2025	6416.3 µg/m³
22 May 2025	6215.1 µg/m³
11 Dec 2023	6215.0 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, Townsville, Australia, 1 Jan 2023 – 12 Oct 2026. Monitor data from Queensland Government, via OpenAQ and from the publisher directly; sources listed at smogrank.com/sources. smogrank.com/au/townsville/history (accessed 12 Oct 2026).

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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.

Townsville 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).