SmogRank / Australia / Queensland / Mackay

Mackay, month by month

Mackay has a measured daily mean on 1,141 days since 1 January 2023. Its worst month was October 2025, at 52 US AQI (9.6 µg/m³), 605th of 2,614 cities on that month's world ranking. Its cleanest was June 2025, at 28 US AQI (5.1 µg/m³). 2025 averaged 37 US AQI (6.6 µg/m³), against 33 US AQI (6.0 µg/m³) in 2024.

Every month since 2023

202634 so far201 days measured2,447th of 2,791 in the world

Jan36#1,995 Feb32#2,465 Mar36#2,456 Apr36#2,078 May33#1,982 Jun31#2,037Jul11 daysAugnoneSepnoneOct39#1,465

202537 for the year363 days measured2,220th of 2,681 in the world

Jan31#2,093 Feb36#1,999 Mar31#2,386 Apr34#2,263 May31#2,135 Jun28#2,287 Jul38#2,041 Aug42#1,980 Sep47#1,085 Oct52#605 Nov39#1,843 Dec33#2,447

202433 for the year349 days measured1,774th of 2,097 in the world

Jan31#1,957 Feb32#1,929Mar21 daysApr28#1,941 May28#2,246 Jun32#2,080 Jul33#2,002 Aug31#1,816 Sep47#730 Oct40#1,038 Nov34#1,948 Dec30#2,213

2023too few days for a mean (a year needs 256)228 days measured

Jan38#868Feb2 daysMar9 daysApr19 daysMay13 daysJun11 daysJul17 daysAug36#1,488 Sep42#1,317Oct20 daysNov40#1,380 Dec41#1,434

Each square is a month's mean PM2.5 in US AQI from Mackay'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 Mackay 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	17 of 31 days measured; a month needs 22. The others: 1 missing from OpenAQ's archive, 13 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	13 of 31 days measured; a month needs 22. The others: 18 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.

Mackay's worst months

Month	US AQI	Days measured	World rank
October 2025	529.6 µg/m³	31 of 31	605thof 2,614
September 2024	478.4 µg/m³	30 of 30	730thof 2,010
September 2025	478.4 µg/m³	30 of 30	1,085thof 3,104
September 2023	427.5 µg/m³	30 of 30	1,317thof 2,176
August 2025	427.5 µg/m³	31 of 31	1,980thof 2,901
December 2023	417.4 µg/m³	30 of 31	1,434thof 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.

Mackay's worst days

Day	US AQI
4 Oct 2025	9230.9 µg/m³
26 Sept 2025	8125.2 µg/m³
3 Oct 2025	7521.9 µg/m³
1 Oct 2025	7220.6 µg/m³
5 Oct 2025	6818.1 µg/m³
5 Nov 2023	6717.8 µg/m³
1 Jul 2023	6516.4 µg/m³
11 May 2023	6415.9 µg/m³
25 Sept 2025	6315.7 µg/m³
28 Oct 2023	6215.2 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, Mackay, 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/mackay/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.

Mackay now: the last 24 hours, its ranks today and the last 12 months day by day.

Updated 2026-10-12 19:07 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).