Ballarat, Victoria, Australia Historical Air Quality Analysis
Dive into detailed Air Quality Insights with historical data, monthly patterns, and yearly trends at your fingertips!
September Air Quality Analysis
Ballarat, Victoria, Australia
AQI Trends: Highest and Lowest
Same Day Analysis (25th September ):
On this day, AQI across the 3 years varied significantly: 2025 ranks 1st highest AQI at 25 of Good air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 26th Sep - 27th Sep 2025
Ballarat, Victoria, Australia
6 AM26th Sep 2025
6 PM
5 AM27th Sep 2025
32AQI
17AQI
31AQI
16AQI
In the last 24 hours,
Ballarat's AQI reached its highest point of 32 at 12 PM during the Day, while the lowest point, 16, was recorded at 5 AM during the Night between 26th Sep and 27th Sep 2025.
Day & Night AQI Trend : Aug - Sep 2025
Ballarat, Victoria, Australia
7°C5/11°C
6°C4/8°C
6°C2/9°C
8°C4/12°C
8°C3/13°C
8°C2/14°C
9°C6/14°C
7°C1/11°C
6°C-1/13°C
11°C1/17°C
13°C9/16°C
10°C6/14°C
8°C2/12°C
6°C1/11°C
7°C2/13°C
8°C2/14°C
10°C6/15°C
11°C4/18°C
15°C7/22°C
10°C5/13°C
7°C3/11°C
9°C2/17°C
12°C4/19°C
6°C3/10°C
9°C4/11°C
7°C3/12°C
9°C4/12°C
9°C7/13°C
10°C7/13°C
12°C5/19°C
--°C/°C
21AQI
17AQI
22AQI
20AQI
2025 Days Vs Air Quality
Ballarat, Victoria, Australia
100%
268
Total number of days with different AQI categories in last 270 days in 2025 (95 days remaining)
Under WHO’s Safe Air Quality Limits: 100%
Health Risk Level:
Very Low
In 2025, 100% of 270 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
Ballarat, Victoria, Australia
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
26AQI
23AQI
26AQI
25AQI
25AQI
23AQI
23AQI
25AQI
26AQI
26AQI
27AQI
25AQI
25AQI
26AQI
27AQI
27AQI
24AQI
25AQI
26AQI
30AQI
27AQI
25AQI
24AQI
24AQI
24AQI
24AQI
26AQI
28AQI
23AQI
25AQI
26AQI
29AQI
30AQI
29AQI
33AQI
49AQI
47AQI
50AQI
46AQI
34AQI
31AQI
30AQI
30AQI
27AQI
25AQI
29AQI
21AQI
22AQI
23AQI
23AQI
20AQI
24AQI
24AQI
23AQI
24AQI
22AQI
24AQI
23AQI
22AQI
24AQI
23AQI
20AQI
26AQI
26AQI
27AQI
23AQI
23AQI
22AQI
24AQI
24AQI
24AQI
21AQI
23AQI
20AQI
19AQI
16AQI
16AQI
20AQI
17AQI
16AQI
17AQI
15AQI
18AQI
21AQI
19AQI
18AQI
20AQI
23AQI
17AQI
17AQI
16AQI
22AQI
22AQI
31AQI
24AQI
22AQI
17AQI
17AQI
18AQI
19AQI
24AQI
24AQI
25AQI
24AQI
26AQI
26AQI
27AQI
24AQI
23AQI
20AQI
17AQI
15AQI
19AQI
18AQI
20AQI
19AQI
13AQI
14AQI
13AQI
15AQI
15AQI
17AQI
19AQI
19AQI
18AQI
21AQI
22AQI
20AQI
19AQI
20AQI
21AQI
20AQI
20AQI
22AQI
20AQI
22AQI
22AQI
19AQI
20AQI
23AQI
27AQI
21AQI
23AQI
19AQI
20AQI
24AQI
20AQI
19AQI
19AQI
20AQI
20AQI
21AQI
22AQI
20AQI
20AQI
19AQI
20AQI
20AQI
18AQI
18AQI
18AQI
18AQI
23AQI
22AQI
24AQI
22AQI
20AQI
21AQI
23AQI
24AQI
27AQI
31AQI
38AQI
33AQI
34AQI
31AQI
30AQI
29AQI
34AQI
36AQI
34AQI
34AQI
34AQI
32AQI
33AQI
32AQI
33AQI
34AQI
36AQI
33AQI
29AQI
28AQI
27AQI
25AQI
25AQI
25AQI
27AQI
27AQI
28AQI
24AQI
23AQI
21AQI
22AQI
20AQI
20AQI
20AQI
19AQI
18AQI
19AQI
18AQI
20AQI
19AQI
22AQI
26AQI
30AQI
28AQI
25AQI
23AQI
26AQI
24AQI
32AQI
29AQI
27AQI
32AQI
26AQI
27AQI
23AQI
21AQI
24AQI
27AQI
23AQI
21AQI
20AQI
19AQI
19AQI
22AQI
23AQI
26AQI
23AQI
19AQI
18AQI
19AQI
18AQI
19AQI
21AQI
21AQI
20AQI
21AQI
22AQI
23AQI
21AQI
21AQI
21AQI
20AQI
22AQI
19AQI
19AQI
20AQI
18AQI
19AQI
18AQI
18AQI
17AQI
17AQI
19AQI
18AQI
18AQI
25AQI
25AQI
29AQI
21AQI
20AQI
20AQI
25AQI
26AQI
24AQI
20AQI
No. of days
202523AQI
Highest AQI recorded in
February29AQI
Lowest AQI recorded in
September20AQI
202419AQI
Highest AQI recorded in
December24AQI
Lowest AQI recorded in
October16AQI
202318AQI
Highest AQI recorded in
June20AQI
Lowest AQI recorded in
January17AQI
202217AQI
Highest AQI recorded in
November18AQI
Lowest AQI recorded in
October17AQI
Most & Least Polluted Years Over the Last 4 Years
Ballarat's annual 2025 AQI (23) shows an average percentage change of 29.4% (worsened AQI) compared to previous years: 2022 (17), 2023 (18), 2024 (19).