Zalau, Slaj, Romania 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
Zalau, Slaj, Romania
AQI Trends: Highest and Lowest
Same Day Analysis (14th March):
On this day, AQI across the 4 years varied significantly: 2026 ranks 1st highest AQI at 92 of Moderate air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 13th Mar - 14th Mar 2026
Zalau, Slaj, Romania
7 AM13th Mar 2026
6 PM
6 AM14th Mar 2026
122AQI
36AQI
145AQI
67AQI
In the last 24 hours,
Zalau's AQI reached its highest point of 145 at 2 AM during the Night, while the lowest point, 36, was recorded at 4 PM during the Day between 13th Mar and 14th Mar 2026.
Day & Night AQI Trend : Feb - Mar 2026
Zalau, Slaj, Romania
7°C4/10°C
7°C3/11°C
4°C-1/7°C
-2°C-4/2°C
1°C-1/4°C
1°C-2/5°C
2°C-1/5°C
5°C3/10°C
1°C0/2°C
2°C1/4°C
5°C3/6°C
5°C2/7°C
2°C0/5°C
1°C-2/6°C
3°C0/8°C
5°C1/10°C
6°C2/12°C
7°C4/12°C
7°C3/11°C
8°C3/13°C
8°C5/12°C
7°C2/12°C
8°C3/13°C
8°C4/14°C
8°C4/14°C
8°C3/14°C
9°C4/15°C
10°C5/15°C
10°C6/16°C
9°C4/15°C
89AQI
58AQI
97AQI
73AQI
2026 Days Vs Air Quality
Zalau, Slaj, Romania
10%
7
64%
47
25%
18
1%
1
Total number of days with different AQI categories in last 74 days in 2026 (291 days remaining)
Under WHO’s Safe Air Quality Limits: 10%
Health Risk Level:
Extreme
In 2026, 10% of 74 days were within WHO’s safe air quality limits. The risk of health issues is Extreme, potentially causing respiratory problems, heart disease, skin issues, and stress, especially for children, the elderly, and those with pre-existing conditions.
Annual Air Quality Insights
Zalau, Slaj, Romania
AQI levels in 2026
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
53AQI (US)
55AQI (US)
48AQI (US)
73AQI (US)
111AQI (US)
80AQI (US)
71AQI (US)
69AQI (US)
81AQI (US)
102AQI (US)
71AQI (US)
73AQI (US)
124AQI (US)
110AQI (US)
124AQI (US)
119AQI (US)
47AQI (US)
72AQI (US)
87AQI (US)
162AQI (US)
119AQI (US)
124AQI (US)
115AQI (US)
138AQI (US)
124AQI (US)
60AQI (US)
89AQI (US)
56AQI (US)
48AQI (US)
123AQI (US)
92AQI (US)
84AQI (US)
83AQI (US)
84AQI (US)
91AQI (US)
64AQI (US)
58AQI (US)
77AQI (US)
68AQI (US)
96AQI (US)
38AQI (US)
60AQI (US)
85AQI (US)
100AQI (US)
67AQI (US)
80AQI (US)
79AQI (US)
95AQI (US)
80AQI (US)
73AQI (US)
63AQI (US)
33AQI (US)
81AQI (US)
102AQI (US)
69AQI (US)
24AQI (US)
36AQI (US)
76AQI (US)
105AQI (US)
120AQI (US)
123AQI (US)
109AQI (US)
74AQI (US)
78AQI (US)
61AQI (US)
90AQI (US)
104AQI (US)
81AQI (US)
69AQI (US)
77AQI (US)
93AQI (US)
94AQI (US)
92AQI (US)
91AQI (US)
73AQI (US)
90AQI (US)
No. of days
202684AQI (US)
Highest AQI (US) recorded in
January91AQI (US)
Lowest AQI (US) recorded in
February73AQI (US)
202550AQI (US)
Highest AQI (US) recorded in
December88AQI (US)
Lowest AQI (US) recorded in
July29AQI (US)
202448AQI (US)
Highest AQI (US) recorded in
November75AQI (US)
Lowest AQI (US) recorded in
August28AQI (US)
202318AQI (US)
Highest AQI (US) recorded in
December71AQI (US)
Lowest AQI (US) recorded in
May4AQI (US)
202217AQI (US)
Highest AQI (US) recorded in
July66AQI (US)
Lowest AQI (US) recorded in
August4AQI (US)
202119AQI (US)
Highest AQI (US) recorded in
November30AQI (US)
Lowest AQI (US) recorded in
May8AQI (US)
202019AQI (US)
Highest AQI (US) recorded in
November25AQI (US)
Lowest AQI (US) recorded in
December7AQI (US)
Most & Least Polluted Years Over the Last 7 Years
Zalau's annual 2026 AQI (US) (84) shows an average percentage change of 265.1% (worsened AQI (US)) compared to previous years: 2020 (19), 2021 (19), 2022 (17), 2023 (18), 2024 (48), 2025 (50).