West, Haarlem, Noord Holland, Netherlands Historical Air Quality Analysis
Dive into detailed Air Quality Insights with historical data, monthly patterns, and yearly trends at your fingertips!
August Air Quality Analysis
West, Haarlem, Noord Holland, Netherlands
AQI Trends: Highest and Lowest
Same Day Analysis (6th August ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 3rd highest AQI at 26 of Good air quality, showing improvement over 2024 and 2021 on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 6th Aug - 7th Aug 2025
West, Haarlem, Noord Holland, Netherlands
5 AM6th Aug 2025
9 PM
4 AM7th Aug 2025
33AQI
23AQI
28AQI
24AQI
In the last 24 hours,
West's AQI reached its highest point of 33 at 11 AM during the Day, while the lowest point, 23, was recorded at 8 AM during the Day between 6th Aug and 7th Aug 2025.
Day & Night AQI Trend : Jul - Aug 2025
West, Haarlem, Noord Holland, Netherlands
15°C14/17°C
17°C15/18°C
18°C16/19°C
18°C16/20°C
18°C16/20°C
19°C17/20°C
19°C17/21°C
19°C18/19°C
17°C15/18°C
18°C17/19°C
19°C16/22°C
22°C18/27°C
19°C17/22°C
19°C17/21°C
18°C18/19°C
19°C18/19°C
19°C17/20°C
19°C18/20°C
19°C18/21°C
18°C17/19°C
18°C17/19°C
18°C16/19°C
17°C16/18°C
18°C17/19°C
17°C17/18°C
17°C17/18°C
18°C17/19°C
19°C18/20°C
17°C17/18°C
17°C17/18°C
--°C/°C
24AQI
24AQI
24AQI
24AQI
2025 Days Vs Air Quality
West, Haarlem, Noord Holland, Netherlands
71%
155
26%
56
3%
7
Total number of days with different AQI categories in last 219 days in 2025 (146 days remaining)
Under WHO’s Safe Air Quality Limits: 71%
Health Risk Level:
Low
In 2025, 71% of 219 days were within WHO’s safe air quality limits. The risk of health issues is Low, but the long-term effects, especially on vulnerable individuals, remain uncertain.
Annual Air Quality Insights
West, Haarlem, Noord Holland, Netherlands
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
52AQI
32AQI
34AQI
41AQI
44AQI
31AQI
34AQI
33AQI
39AQI
35AQI
39AQI
33AQI
54AQI
77AQI
50AQI
60AQI
68AQI
58AQI
94AQI
122AQI
88AQI
76AQI
54AQI
44AQI
46AQI
46AQI
30AQI
30AQI
32AQI
32AQI
40AQI
45AQI
50AQI
54AQI
78AQI
59AQI
41AQI
48AQI
75AQI
102AQI
109AQI
94AQI
88AQI
105AQI
65AQI
63AQI
73AQI
58AQI
68AQI
70AQI
82AQI
57AQI
56AQI
55AQI
45AQI
55AQI
39AQI
33AQI
38AQI
33AQI
61AQI
82AQI
82AQI
125AQI
102AQI
77AQI
72AQI
95AQI
115AQI
61AQI
36AQI
31AQI
26AQI
35AQI
32AQI
29AQI
43AQI
57AQI
72AQI
77AQI
58AQI
55AQI
83AQI
81AQI
38AQI
59AQI
61AQI
42AQI
53AQI
37AQI
38AQI
39AQI
51AQI
52AQI
37AQI
25AQI
34AQI
31AQI
34AQI
37AQI
55AQI
61AQI
54AQI
47AQI
53AQI
42AQI
38AQI
29AQI
26AQI
25AQI
37AQI
57AQI
55AQI
46AQI
36AQI
47AQI
45AQI
48AQI
49AQI
37AQI
51AQI
66AQI
29AQI
27AQI
26AQI
25AQI
30AQI
30AQI
30AQI
31AQI
30AQI
29AQI
29AQI
30AQI
30AQI
31AQI
28AQI
37AQI
26AQI
32AQI
36AQI
29AQI
20AQI
33AQI
31AQI
30AQI
26AQI
20AQI
33AQI
27AQI
29AQI
31AQI
25AQI
27AQI
22AQI
20AQI
19AQI
19AQI
21AQI
36AQI
48AQI
29AQI
36AQI
53AQI
47AQI
36AQI
31AQI
35AQI
36AQI
30AQI
24AQI
34AQI
37AQI
26AQI
30AQI
25AQI
27AQI
25AQI
22AQI
20AQI
25AQI
33AQI
59AQI
25AQI
24AQI
23AQI
21AQI
17AQI
21AQI
22AQI
27AQI
21AQI
20AQI
24AQI
27AQI
26AQI
24AQI
20AQI
23AQI
35AQI
40AQI
23AQI
20AQI
18AQI
25AQI
20AQI
34AQI
21AQI
27AQI
20AQI
20AQI
20AQI
20AQI
19AQI
20AQI
22AQI
23AQI
26AQI
50AQI
64AQI
62AQI
42AQI
31AQI
30AQI
25AQI
22AQI
No. of days
202543AQI
Highest AQI recorded in
February64AQI
Lowest AQI recorded in
August22AQI
202440AQI
Highest AQI recorded in
December47AQI
Lowest AQI recorded in
July33AQI
202338AQI
Highest AQI recorded in
February54AQI
Lowest AQI recorded in
August23AQI
202243AQI
Highest AQI recorded in
March61AQI
Lowest AQI recorded in
August29AQI
202137AQI
Highest AQI recorded in
March47AQI
Lowest AQI recorded in
November21AQI
202038AQI
Highest AQI recorded in
November47AQI
Lowest AQI recorded in
July28AQI
Most & Least Polluted Years Over the Last 6 Years
West's annual 2025 AQI (43) shows an average percentage change of 9.7% (worsened AQI) compared to previous years: 2020 (38), 2021 (37), 2022 (43), 2023 (38), 2024 (40).