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!
March Air Quality Analysis
West, Haarlem, Noord Holland, Netherlands
AQI Trends: Highest and Lowest
Same Day Analysis (12th March):
On this day, AQI across the 5 years varied significantly: 2026 ranks the most lowest AQI at 29 of Good air quality, showing improvement over 2025, 2024, 2023 and 2022 on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 11th Mar - 12th Mar 2026
West, Haarlem, Noord Holland, Netherlands
7 AM11th Mar 2026
6 PM
6 AM12th Mar 2026
60AQI
19AQI
38AQI
23AQI
In the last 24 hours,
West's AQI reached its highest point of 60 at 7 AM during the Day, while the lowest point, 19, was recorded at 1 PM during the Day between 11th Mar and 12th Mar 2026.
Day & Night AQI Trend : Feb - Mar 2026
West, Haarlem, Noord Holland, Netherlands
7°C7/8°C
7°C5/8°C
2°C1/3°C
2°C1/4°C
1°C0/4°C
5°C1/6°C
5°C4/6°C
2°C1/4°C
3°C1/4°C
5°C2/7°C
8°C7/8°C
8°C8/8°C
8°C7/8°C
8°C7/9°C
10°C8/13°C
9°C8/10°C
9°C8/10°C
8°C6/9°C
7°C5/9°C
9°C7/12°C
8°C6/11°C
8°C5/12°C
10°C8/14°C
10°C8/12°C
8°C7/9°C
10°C7/14°C
8°C6/9°C
8°C6/10°C
8°C8/9°C
9°C7/10°C
50AQI
43AQI
50AQI
48AQI
2026 Days Vs Air Quality
West, Haarlem, Noord Holland, Netherlands
48%
34
45%
32
7%
5
Total number of days with different AQI categories in last 72 days in 2026 (293 days remaining)
Under WHO’s Safe Air Quality Limits: 48%
Health Risk Level:
Significant
In 2026, 48% of 72 days were within WHO’s safe air quality limits, and 52% exceeded them. The risk of health issues is Significant, especially for those with existing respiratory or heart conditions.
Annual Air Quality Insights
West, Haarlem, Noord Holland, Netherlands
AQI levels in 2026
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
36AQI (US)
20AQI (US)
23AQI (US)
23AQI (US)
35AQI (US)
25AQI (US)
57AQI (US)
42AQI (US)
44AQI (US)
41AQI (US)
57AQI (US)
45AQI (US)
40AQI (US)
34AQI (US)
41AQI (US)
30AQI (US)
56AQI (US)
69AQI (US)
81AQI (US)
75AQI (US)
54AQI (US)
80AQI (US)
98AQI (US)
110AQI (US)
141AQI (US)
85AQI (US)
57AQI (US)
89AQI (US)
90AQI (US)
89AQI (US)
73AQI (US)
66AQI (US)
94AQI (US)
104AQI (US)
84AQI (US)
125AQI (US)
105AQI (US)
46AQI (US)
51AQI (US)
74AQI (US)
70AQI (US)
47AQI (US)
35AQI (US)
26AQI (US)
27AQI (US)
59AQI (US)
31AQI (US)
27AQI (US)
53AQI (US)
60AQI (US)
57AQI (US)
35AQI (US)
25AQI (US)
31AQI (US)
46AQI (US)
38AQI (US)
43AQI (US)
51AQI (US)
30AQI (US)
32AQI (US)
29AQI (US)
46AQI (US)
43AQI (US)
64AQI (US)
64AQI (US)
74AQI (US)
79AQI (US)
90AQI (US)
99AQI (US)
42AQI (US)
29AQI (US)
59AQI (US)
55AQI (US)
58AQI (US)
No. of days
202657AQI (US)
Highest AQI (US) recorded in
January59AQI (US)
Lowest AQI (US) recorded in
February55AQI (US)
202541AQI (US)
Highest AQI (US) recorded in
February64AQI (US)
Lowest AQI (US) recorded in
September25AQI (US)
202440AQI (US)
Highest AQI (US) recorded in
December47AQI (US)
Lowest AQI (US) recorded in
July33AQI (US)
202338AQI (US)
Highest AQI (US) recorded in
February54AQI (US)
Lowest AQI (US) recorded in
August23AQI (US)
202243AQI (US)
Highest AQI (US) recorded in
March61AQI (US)
Lowest AQI (US) recorded in
August29AQI (US)
202137AQI (US)
Highest AQI (US) recorded in
March47AQI (US)
Lowest AQI (US) recorded in
November21AQI (US)
202038AQI (US)
Highest AQI (US) recorded in
November47AQI (US)
Lowest AQI (US) recorded in
July28AQI (US)
Most & Least Polluted Years Over the Last 7 Years
West's annual 2026 AQI (US) (57) shows an average percentage change of 46.3% (worsened AQI (US)) compared to previous years: 2020 (38), 2021 (37), 2022 (43), 2023 (38), 2024 (40), 2025 (41).