Coastguard, Townsville, Queensland, Australia Historical Air Quality Analysis
Dive into detailed Air Quality Insights with historical data, monthly patterns, and yearly trends at your fingertips!
October Air Quality Analysis
Coastguard, Townsville, Queensland, Australia
AQI Trends: Highest and Lowest
Same Day Analysis (18th October ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 1st highest AQI at 51 of Moderate air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 18th Oct - 19th Oct 2025
Coastguard, Townsville, Queensland, Australia
5 AM18th Oct 2025
6 PM
4 AM19th Oct 2025
AQI
AQI
61AQI
35AQI
In the last 24 hours,
Coastguard's AQI reached its highest point of 61 at 9 PM during the Night, while the lowest point, 35, was recorded at 12 AM during the Night between 18th Oct and 19th Oct 2025.
Day & Night AQI Trend : Sep - Oct 2025
Coastguard, Townsville, Queensland, Australia
23°C21/26°C
24°C22/26°C
24°C21/27°C
24°C22/27°C
24°C21/27°C
23°C19/26°C
22°C18/25°C
22°C18/26°C
23°C21/26°C
24°C21/28°C
24°C20/28°C
23°C20/27°C
24°C20/27°C
25°C21/29°C
25°C21/33°C
23°C19/27°C
23°C19/27°C
23°C20/27°C
24°C20/27°C
25°C22/27°C
25°C23/28°C
25°C23/28°C
25°C22/28°C
25°C23/28°C
26°C24/28°C
26°C24/29°C
26°C24/28°C
25°C23/27°C
25°C23/28°C
--°C/°C
--°C/°C
49AQI
43AQI
48AQI
44AQI
2025 Days Vs Air Quality
Coastguard, Townsville, Queensland, Australia
95%
277
5%
14
Total number of days with different AQI categories in last 291 days in 2025 (74 days remaining)
Under WHO’s Safe Air Quality Limits: 95%
Health Risk Level:
Very Low
In 2025, 95% of 291 days were within WHO’s safe air quality limits. The risk of health issues is Very Low, but health impacts are still unclear.
Annual Air Quality Insights
Coastguard, Townsville, Queensland, Australia
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
29AQI
29AQI
27AQI
26AQI
25AQI
28AQI
26AQI
26AQI
25AQI
24AQI
24AQI
25AQI
24AQI
24AQI
24AQI
23AQI
25AQI
26AQI
27AQI
28AQI
27AQI
25AQI
26AQI
31AQI
30AQI
31AQI
30AQI
30AQI
29AQI
28AQI
28AQI
27AQI
27AQI
27AQI
27AQI
26AQI
26AQI
27AQI
25AQI
25AQI
26AQI
25AQI
24AQI
30AQI
26AQI
29AQI
26AQI
28AQI
27AQI
25AQI
23AQI
24AQI
24AQI
23AQI
23AQI
23AQI
24AQI
24AQI
24AQI
25AQI
25AQI
24AQI
24AQI
22AQI
21AQI
22AQI
22AQI
22AQI
22AQI
23AQI
22AQI
23AQI
24AQI
27AQI
24AQI
24AQI
23AQI
21AQI
21AQI
21AQI
20AQI
20AQI
21AQI
21AQI
24AQI
23AQI
22AQI
22AQI
21AQI
21AQI
20AQI
20AQI
19AQI
20AQI
20AQI
19AQI
20AQI
17AQI
18AQI
21AQI
20AQI
18AQI
22AQI
20AQI
22AQI
22AQI
22AQI
22AQI
24AQI
22AQI
19AQI
18AQI
20AQI
22AQI
24AQI
24AQI
23AQI
23AQI
24AQI
24AQI
24AQI
23AQI
21AQI
23AQI
23AQI
27AQI
26AQI
29AQI
30AQI
28AQI
29AQI
28AQI
26AQI
29AQI
26AQI
26AQI
24AQI
21AQI
21AQI
23AQI
22AQI
23AQI
23AQI
24AQI
23AQI
23AQI
25AQI
24AQI
25AQI
23AQI
23AQI
23AQI
24AQI
24AQI
23AQI
24AQI
23AQI
23AQI
23AQI
23AQI
23AQI
25AQI
27AQI
27AQI
26AQI
27AQI
26AQI
27AQI
28AQI
28AQI
30AQI
29AQI
33AQI
31AQI
29AQI
27AQI
26AQI
28AQI
27AQI
26AQI
26AQI
25AQI
24AQI
22AQI
23AQI
25AQI
23AQI
22AQI
23AQI
24AQI
24AQI
24AQI
25AQI
28AQI
26AQI
27AQI
27AQI
27AQI
28AQI
27AQI
27AQI
27AQI
27AQI
26AQI
26AQI
29AQI
29AQI
27AQI
26AQI
26AQI
25AQI
25AQI
26AQI
25AQI
26AQI
27AQI
26AQI
30AQI
29AQI
28AQI
28AQI
26AQI
26AQI
26AQI
24AQI
29AQI
26AQI
24AQI
24AQI
22AQI
25AQI
29AQI
26AQI
27AQI
25AQI
34AQI
30AQI
30AQI
31AQI
28AQI
26AQI
29AQI
34AQI
26AQI
25AQI
24AQI
24AQI
25AQI
25AQI
27AQI
25AQI
23AQI
26AQI
39AQI
26AQI
26AQI
26AQI
26AQI
26AQI
30AQI
27AQI
26AQI
25AQI
25AQI
24AQI
25AQI
25AQI
33AQI
66AQI
47AQI
22AQI
34AQI
51AQI
47AQI
46AQI
54AQI
81AQI
59AQI
54AQI
49AQI
48AQI
48AQI
50AQI
61AQI
62AQI
61AQI
55AQI
54AQI
55AQI
51AQI
51AQI
27AQI
26AQI
22AQI
21AQI
25AQI
26AQI
26AQI
27AQI
29AQI
55AQI
No. of days
202527AQI
Highest AQI recorded in
October55AQI
Lowest AQI recorded in
April21AQI
202418AQI
Highest AQI recorded in
December28AQI
Lowest AQI recorded in
January11AQI
202314AQI
Highest AQI recorded in
September18AQI
Lowest AQI recorded in
February11AQI
202213AQI
Highest AQI recorded in
November15AQI
Lowest AQI recorded in
August8AQI
202114AQI
Highest AQI recorded in
September20AQI
Lowest AQI recorded in
February12AQI
202016AQI
Highest AQI recorded in
September20AQI
Lowest AQI recorded in
May13AQI
Most & Least Polluted Years Over the Last 6 Years
Coastguard's annual 2025 AQI (27) shows an average percentage change of 83.1% (worsened AQI) compared to previous years: 2020 (16), 2021 (14), 2022 (13), 2023 (14), 2024 (18).