Country Background
HistoryAQIPM2.5PM10COSO2NO2O3

Sint Niklaas, Flanders, Belgium Historical Air Quality Analysis

Dive into detailed Air Quality Insights with historical data, monthly patterns, and yearly trends at your fingertips!

Good
050
Moderate
100
Poor
150
Unhealthy
200
Severe
300
Hazardous
301+

August Air Quality Analysis

Sint Niklaas, Flanders, Belgium

2021
2022
2023
2024
2025
AQI
.
Days

AQI Trends: Highest and Lowest

Highest AQI recorded on
2nd Aug 2024
88AQI
Lowest AQI recorded on
2nd Aug 2023
13AQI

Same Day Analysis (17th August ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 4th highest AQI at 32 of Good air quality, showing improvement over 2024, 2023 and 2021 on the same day.

Download 2024 Annual Data

World Air Quality Report

Globe

Day & Night AQI Trend: 17th Aug - 18th Aug 2025

Sint Niklaas, Flanders, Belgium

AQI
Day
Night
.

6 AM17th Aug 2025

9 PM

5 AM18th Aug 2025

Day time
Avg. Highest Time
3PM17th Aug

34AQI

Avg. Lowest Time
7AM17th Aug

23AQI

Night time
Avg. Highest Time
10PM17th Aug

32AQI

Avg. Lowest Time
5AM18th Aug

16AQI

In the last 24 hours,

Sint Niklaas's AQI reached its highest point of 34 at 3 PM during the Day, while the lowest point, 16, was recorded at 5 AM during the Night between 17th Aug and 18th Aug 2025.

Day & Night AQI Trend : Jul - Aug 2025

Sint Niklaas, Flanders, Belgium

JulAug
19th - 20th20th - 21st21st - 22nd22nd - 23rd23rd - 24th24th - 25th25th - 26th26th - 27th27th - 28th28th - 29th29th - 30th30th - 31st31st - 01st01st - 02nd02nd - 03rd03rd - 04th04th - 05th05th - 06th06th - 07th07th - 08th08th - 09th09th - 10th10th - 11th11th - 12th12th - 13th13th - 14th14th - 15th15th - 16th16th - 17th17th - 18th18th
Day
Night
19th Jul 2025416 AMAQI
19th Jul 2025377 AMAQI
19th Jul 2025448 AMAQI
19th Jul 2025479 AMAQI
19th Jul 20255310 AMAQI
19th Jul 20253711 AMAQI
19th Jul 20253812 PMAQI
19th Jul 2025341 PMAQI
19th Jul 2025332 PMAQI
19th Jul 2025333 PMAQI
19th Jul 2025314 PMAQI
19th Jul 2025295 PMAQI
19th Jul 2025326 PMAQI
19th Jul 2025367 PMAQI
19th Jul 2025348 PMAQI
19th Jul 2025329 PMAQI
19th Jul 20253210 PMAQI
19th Jul 20253611 PMAQI
20th Jul 20253712 AMAQI
20th Jul 2025351 AMAQI
20th Jul 2025422 AMAQI
20th Jul 2025513 AMAQI
20th Jul 2025514 AMAQI
20th Jul 2025505 AMAQI

25°C18/34°C

20th Jul 2025486 AMAQI
20th Jul 2025427 AMAQI
20th Jul 2025448 AMAQI
20th Jul 2025349 AMAQI
20th Jul 20252910 AMAQI
20th Jul 20252611 AMAQI
20th Jul 20252512 PMAQI
20th Jul 2025251 PMAQI
20th Jul 2025322 PMAQI
20th Jul 2025313 PMAQI
20th Jul 2025304 PMAQI
20th Jul 2025315 PMAQI
20th Jul 2025286 PMAQI
20th Jul 2025277 PMAQI
20th Jul 2025278 PMAQI
20th Jul 2025309 PMAQI
20th Jul 20253610 PMAQI
20th Jul 20253711 PMAQI
21st Jul 20253612 AMAQI
21st Jul 2025371 AMAQI
21st Jul 2025242 AMAQI
21st Jul 2025123 AMAQI
21st Jul 2025124 AMAQI
21st Jul 2025155 AMAQI

19°C17/26°C

21st Jul 2025166 AMAQI
21st Jul 2025147 AMAQI
21st Jul 2025168 AMAQI
21st Jul 2025179 AMAQI
21st Jul 20251810 AMAQI
21st Jul 20251811 AMAQI
21st Jul 20251712 PMAQI
21st Jul 2025181 PMAQI
21st Jul 2025182 PMAQI
21st Jul 2025163 PMAQI
21st Jul 2025164 PMAQI
21st Jul 2025175 PMAQI
21st Jul 2025156 PMAQI
21st Jul 2025187 PMAQI
21st Jul 2025208 PMAQI
21st Jul 2025189 PMAQI
21st Jul 20251910 PMAQI
21st Jul 20251911 PMAQI
22nd Jul 20251912 AMAQI
22nd Jul 2025201 AMAQI
22nd Jul 2025182 AMAQI
22nd Jul 2025203 AMAQI
22nd Jul 2025224 AMAQI
22nd Jul 2025205 AMAQI

18°C14/22°C

22nd Jul 2025206 AMAQI
22nd Jul 2025187 AMAQI
22nd Jul 2025188 AMAQI
22nd Jul 2025179 AMAQI
22nd Jul 20251810 AMAQI
22nd Jul 20252011 AMAQI
22nd Jul 20251912 PMAQI
22nd Jul 2025261 PMAQI
22nd Jul 2025242 PMAQI
22nd Jul 2025203 PMAQI
22nd Jul 2025174 PMAQI
22nd Jul 2025185 PMAQI
22nd Jul 2025186 PMAQI
22nd Jul 2025187 PMAQI
22nd Jul 2025198 PMAQI
22nd Jul 2025199 PMAQI
22nd Jul 20252010 PMAQI
22nd Jul 20252011 PMAQI
23rd Jul 20252012 AMAQI
23rd Jul 2025201 AMAQI
23rd Jul 2025192 AMAQI
23rd Jul 2025183 AMAQI
23rd Jul 2025184 AMAQI
23rd Jul 2025165 AMAQI

19°C13/25°C

23rd Jul 2025176 AMAQI
23rd Jul 2025187 AMAQI
23rd Jul 2025188 AMAQI
23rd Jul 2025199 AMAQI
23rd Jul 20251910 AMAQI
23rd Jul 20252411 AMAQI
23rd Jul 20252912 PMAQI
23rd Jul 2025271 PMAQI
23rd Jul 2025262 PMAQI
23rd Jul 2025253 PMAQI
23rd Jul 2025184 PMAQI
23rd Jul 2025205 PMAQI
23rd Jul 2025226 PMAQI
23rd Jul 2025227 PMAQI
23rd Jul 2025228 PMAQI
23rd Jul 2025199 PMAQI
23rd Jul 20251810 PMAQI
23rd Jul 20251911 PMAQI
24th Jul 20252112 AMAQI
24th Jul 2025191 AMAQI
24th Jul 2025252 AMAQI
24th Jul 2025253 AMAQI
24th Jul 2025274 AMAQI
24th Jul 2025295 AMAQI

18°C13/23°C

24th Jul 2025296 AMAQI
24th Jul 2025297 AMAQI
24th Jul 2025308 AMAQI
24th Jul 2025319 AMAQI
24th Jul 20253110 AMAQI
24th Jul 20253211 AMAQI
24th Jul 20252212 PMAQI
24th Jul 2025211 PMAQI
24th Jul 2025242 PMAQI
24th Jul 2025223 PMAQI
24th Jul 2025234 PMAQI
24th Jul 2025245 PMAQI
24th Jul 2025256 PMAQI
24th Jul 2025287 PMAQI
24th Jul 2025268 PMAQI
24th Jul 2025259 PMAQI
24th Jul 20252610 PMAQI
24th Jul 20252611 PMAQI
25th Jul 20252712 AMAQI
25th Jul 2025271 AMAQI
25th Jul 2025332 AMAQI
25th Jul 2025363 AMAQI
25th Jul 2025404 AMAQI
25th Jul 2025395 AMAQI

19°C15/24°C

25th Jul 2025426 AMAQI
25th Jul 2025407 AMAQI
25th Jul 2025438 AMAQI
25th Jul 2025429 AMAQI
25th Jul 20253510 AMAQI
25th Jul 20252311 AMAQI
25th Jul 20252112 PMAQI
25th Jul 2025251 PMAQI
25th Jul 2025282 PMAQI
25th Jul 2025263 PMAQI
25th Jul 2025264 PMAQI
25th Jul 2025255 PMAQI
25th Jul 2025246 PMAQI
25th Jul 2025267 PMAQI
25th Jul 2025268 PMAQI
25th Jul 2025289 PMAQI
25th Jul 20253410 PMAQI
25th Jul 20253311 PMAQI
26th Jul 20253312 AMAQI
26th Jul 2025341 AMAQI
26th Jul 2025272 AMAQI
26th Jul 2025283 AMAQI
26th Jul 2025354 AMAQI
26th Jul 2025345 AMAQI

19°C15/24°C

26th Jul 2025376 AMAQI
26th Jul 2025447 AMAQI
26th Jul 2025498 AMAQI
26th Jul 2025499 AMAQI
26th Jul 20255010 AMAQI
26th Jul 20255211 AMAQI
26th Jul 20254712 PMAQI
26th Jul 2025421 PMAQI
26th Jul 2025382 PMAQI
26th Jul 2025363 PMAQI
26th Jul 2025364 PMAQI
26th Jul 2025475 PMAQI
26th Jul 2025456 PMAQI
26th Jul 2025477 PMAQI
26th Jul 2025408 PMAQI
26th Jul 2025389 PMAQI
26th Jul 20253410 PMAQI
26th Jul 20253611 PMAQI
27th Jul 20253512 AMAQI
27th Jul 2025361 AMAQI
27th Jul 2025292 AMAQI
27th Jul 2025223 AMAQI
27th Jul 2025224 AMAQI
27th Jul 2025245 AMAQI

20°C15/26°C

27th Jul 2025266 AMAQI
27th Jul 2025277 AMAQI
27th Jul 2025328 AMAQI
27th Jul 2025289 AMAQI
27th Jul 20252110 AMAQI
27th Jul 20252211 AMAQI
27th Jul 20252012 PMAQI
27th Jul 2025191 PMAQI
27th Jul 2025222 PMAQI
27th Jul 2025223 PMAQI
27th Jul 2025234 PMAQI
27th Jul 2025245 PMAQI
27th Jul 2025236 PMAQI
27th Jul 2025237 PMAQI
27th Jul 2025238 PMAQI
27th Jul 2025249 PMAQI
27th Jul 20252610 PMAQI
27th Jul 20252611 PMAQI
28th Jul 20252712 AMAQI
28th Jul 2025271 AMAQI
28th Jul 2025252 AMAQI
28th Jul 2025263 AMAQI
28th Jul 2025284 AMAQI
28th Jul 2025275 AMAQI

18°C15/21°C

28th Jul 2025286 AMAQI
28th Jul 2025267 AMAQI
28th Jul 2025248 AMAQI
28th Jul 2025269 AMAQI
28th Jul 20252410 AMAQI
28th Jul 20252011 AMAQI
28th Jul 20252212 PMAQI
28th Jul 2025241 PMAQI
28th Jul 2025262 PMAQI
28th Jul 2025263 PMAQI
28th Jul 2025264 PMAQI
28th Jul 2025235 PMAQI
28th Jul 2025236 PMAQI
28th Jul 2025247 PMAQI
28th Jul 2025258 PMAQI
28th Jul 2025249 PMAQI
28th Jul 20252610 PMAQI
28th Jul 20252611 PMAQI
29th Jul 20252612 AMAQI
29th Jul 2025261 AMAQI
29th Jul 2025292 AMAQI
29th Jul 2025343 AMAQI
29th Jul 2025334 AMAQI
29th Jul 2025345 AMAQI

17°C14/22°C

29th Jul 2025326 AMAQI
29th Jul 2025327 AMAQI
29th Jul 2025338 AMAQI
29th Jul 2025399 AMAQI
29th Jul 20255010 AMAQI
29th Jul 20255411 AMAQI
29th Jul 20255412 PMAQI
29th Jul 2025471 PMAQI
29th Jul 2025342 PMAQI
29th Jul 2025333 PMAQI
29th Jul 2025294 PMAQI
29th Jul 2025255 PMAQI
29th Jul 2025236 PMAQI
29th Jul 2025247 PMAQI
29th Jul 2025248 PMAQI
29th Jul 2025269 PMAQI
29th Jul 20253210 PMAQI
29th Jul 20253211 PMAQI
30th Jul 20253112 AMAQI
30th Jul 2025341 AMAQI
30th Jul 2025252 AMAQI
30th Jul 2025243 AMAQI
30th Jul 2025304 AMAQI
30th Jul 2025345 AMAQI

18°C13/24°C

30th Jul 2025416 AMAQI
30th Jul 2025427 AMAQI
30th Jul 2025438 AMAQI
30th Jul 2025459 AMAQI
30th Jul 20254310 AMAQI
30th Jul 20253011 AMAQI
30th Jul 20252412 PMAQI
30th Jul 2025201 PMAQI
30th Jul 2025252 PMAQI
30th Jul 2025243 PMAQI
30th Jul 2025244 PMAQI
30th Jul 2025245 PMAQI
30th Jul 2025246 PMAQI
30th Jul 2025247 PMAQI
30th Jul 2025248 PMAQI
30th Jul 2025249 PMAQI
30th Jul 20252510 PMAQI
30th Jul 20252511 PMAQI
31st Jul 20252512 AMAQI
31st Jul 2025251 AMAQI
31st Jul 2025252 AMAQI
31st Jul 2025253 AMAQI
31st Jul 2025254 AMAQI
31st Jul 2025285 AMAQI

18°C13/23°C

31st Jul 2025316 AMAQI
31st Jul 2025337 AMAQI
31st Jul 2025368 AMAQI
31st Jul 2025349 AMAQI
31st Jul 20253810 AMAQI
31st Jul 20253811 AMAQI
31st Jul 20252812 PMAQI
31st Jul 2025261 PMAQI
31st Jul 2025222 PMAQI
31st Jul 2025223 PMAQI
31st Jul 2025224 PMAQI
31st Jul 2025225 PMAQI
31st Jul 2025206 PMAQI
31st Jul 2025207 PMAQI
31st Jul 2025218 PMAQI
31st Jul 2025239 PMAQI
31st Jul 20252310 PMAQI
31st Jul 20252211 PMAQI
1st Aug 20252112 AMAQI
1st Aug 2025221 AMAQI
1st Aug 2025192 AMAQI
1st Aug 2025203 AMAQI
1st Aug 2025204 AMAQI
1st Aug 2025225 AMAQI

19°C16/24°C

1st Aug 2025196 AMAQI
1st Aug 2025247 AMAQI
1st Aug 2025278 AMAQI
1st Aug 2025269 AMAQI
1st Aug 20252410 AMAQI
1st Aug 20252211 AMAQI
1st Aug 20251812 PMAQI
1st Aug 2025201 PMAQI
1st Aug 2025222 PMAQI
1st Aug 2025203 PMAQI
1st Aug 2025224 PMAQI
1st Aug 2025185 PMAQI
1st Aug 2025196 PMAQI
1st Aug 2025207 PMAQI
1st Aug 2025208 PMAQI
1st Aug 2025229 PMAQI
1st Aug 20252210 PMAQI
1st Aug 20252211 PMAQI
2nd Aug 20252212 AMAQI
2nd Aug 2025221 AMAQI
2nd Aug 2025192 AMAQI
2nd Aug 2025183 AMAQI
2nd Aug 2025184 AMAQI
2nd Aug 2025185 AMAQI

18°C14/22°C

2nd Aug 2025196 AMAQI
2nd Aug 2025197 AMAQI
2nd Aug 2025178 AMAQI
2nd Aug 2025199 AMAQI
2nd Aug 20252010 AMAQI
2nd Aug 20251811 AMAQI
2nd Aug 20252212 PMAQI
2nd Aug 2025211 PMAQI
2nd Aug 2025202 PMAQI
2nd Aug 2025183 PMAQI
2nd Aug 2025194 PMAQI
2nd Aug 2025205 PMAQI
2nd Aug 2025206 PMAQI
2nd Aug 2025197 PMAQI
2nd Aug 2025198 PMAQI
2nd Aug 2025209 PMAQI
2nd Aug 20252110 PMAQI
2nd Aug 20252211 PMAQI
3rd Aug 20252112 AMAQI
3rd Aug 2025191 AMAQI
3rd Aug 2025202 AMAQI
3rd Aug 2025223 AMAQI
3rd Aug 2025194 AMAQI
3rd Aug 2025225 AMAQI

17°C14/20°C

3rd Aug 2025226 AMAQI
3rd Aug 2025217 AMAQI
3rd Aug 2025218 AMAQI
3rd Aug 2025239 AMAQI
3rd Aug 20252610 AMAQI
3rd Aug 20252611 AMAQI
3rd Aug 20252712 PMAQI
3rd Aug 2025221 PMAQI
3rd Aug 2025222 PMAQI
3rd Aug 2025213 PMAQI
3rd Aug 2025224 PMAQI
3rd Aug 2025225 PMAQI
3rd Aug 2025256 PMAQI
3rd Aug 2025227 PMAQI
3rd Aug 2025268 PMAQI
3rd Aug 2025229 PMAQI
3rd Aug 20252310 PMAQI
3rd Aug 20252211 PMAQI
4th Aug 20252212 AMAQI
4th Aug 2025231 AMAQI
4th Aug 2025212 AMAQI
4th Aug 2025263 AMAQI
4th Aug 2025184 AMAQI
4th Aug 2025255 AMAQI

18°C12/24°C

4th Aug 2025306 AMAQI
4th Aug 2025307 AMAQI
4th Aug 2025408 AMAQI
4th Aug 2025239 AMAQI
4th Aug 20253110 AMAQI
4th Aug 20253411 AMAQI
4th Aug 20253512 PMAQI
4th Aug 2025301 PMAQI
4th Aug 2025242 PMAQI
4th Aug 2025253 PMAQI
4th Aug 2025244 PMAQI
4th Aug 2025255 PMAQI
4th Aug 2025226 PMAQI
4th Aug 2025227 PMAQI
4th Aug 2025228 PMAQI
4th Aug 2025239 PMAQI
4th Aug 20252410 PMAQI
4th Aug 20252311 PMAQI
5th Aug 20252412 AMAQI
5th Aug 2025241 AMAQI
5th Aug 2025202 AMAQI
5th Aug 2025183 AMAQI
5th Aug 2025184 AMAQI
5th Aug 2025205 AMAQI

21°C17/27°C

5th Aug 2025206 AMAQI
5th Aug 2025247 AMAQI
5th Aug 2025208 AMAQI
5th Aug 2025219 AMAQI
5th Aug 20252410 AMAQI
5th Aug 20252711 AMAQI
5th Aug 20252612 PMAQI
5th Aug 2025261 PMAQI
5th Aug 2025222 PMAQI
5th Aug 2025223 PMAQI
5th Aug 2025224 PMAQI
5th Aug 2025225 PMAQI
5th Aug 2025226 PMAQI
5th Aug 2025227 PMAQI
5th Aug 2025228 PMAQI
5th Aug 2025229 PMAQI
5th Aug 20252310 PMAQI
5th Aug 20252411 PMAQI
6th Aug 20252312 AMAQI
6th Aug 2025241 AMAQI
6th Aug 2025252 AMAQI
6th Aug 2025243 AMAQI
6th Aug 2025244 AMAQI
6th Aug 2025285 AMAQI

18°C15/21°C

6th Aug 2025266 AMAQI
6th Aug 2025227 AMAQI
6th Aug 2025238 AMAQI
6th Aug 2025309 AMAQI
6th Aug 20253110 AMAQI
6th Aug 20253311 AMAQI
6th Aug 20253312 PMAQI
6th Aug 2025291 PMAQI
6th Aug 2025302 PMAQI
6th Aug 2025263 PMAQI
6th Aug 2025264 PMAQI
6th Aug 2025285 PMAQI
6th Aug 2025266 PMAQI
6th Aug 2025267 PMAQI
6th Aug 2025268 PMAQI
6th Aug 2025249 PMAQI
6th Aug 20252410 PMAQI
6th Aug 20252411 PMAQI
7th Aug 20252512 AMAQI
7th Aug 2025241 AMAQI
7th Aug 2025282 AMAQI
7th Aug 2025273 AMAQI
7th Aug 2025254 AMAQI
7th Aug 2025275 AMAQI

18°C12/24°C

7th Aug 2025306 AMAQI
7th Aug 2025287 AMAQI
7th Aug 2025308 AMAQI
7th Aug 2025349 AMAQI
7th Aug 20253110 AMAQI
7th Aug 20252811 AMAQI
7th Aug 20252712 PMAQI
7th Aug 2025261 PMAQI
7th Aug 2025262 PMAQI
7th Aug 2025273 PMAQI
7th Aug 2025264 PMAQI
7th Aug 2025275 PMAQI
7th Aug 2025286 PMAQI
7th Aug 2025287 PMAQI
7th Aug 2025268 PMAQI
7th Aug 2025269 PMAQI
7th Aug 20252710 PMAQI
7th Aug 20252711 PMAQI
8th Aug 20252712 AMAQI
8th Aug 2025271 AMAQI
8th Aug 2025282 AMAQI
8th Aug 2025243 AMAQI
8th Aug 2025244 AMAQI
8th Aug 2025235 AMAQI

20°C14/26°C

8th Aug 2025256 AMAQI
8th Aug 2025277 AMAQI
8th Aug 2025308 AMAQI
8th Aug 2025349 AMAQI
8th Aug 20253610 AMAQI
8th Aug 20253011 AMAQI
8th Aug 20253712 PMAQI
8th Aug 2025361 PMAQI
8th Aug 2025312 PMAQI
8th Aug 2025313 PMAQI
8th Aug 2025344 PMAQI
8th Aug 2025365 PMAQI
8th Aug 2025376 PMAQI
8th Aug 2025367 PMAQI
8th Aug 2025388 PMAQI
8th Aug 2025369 PMAQI
8th Aug 20253110 PMAQI
8th Aug 20253211 PMAQI
9th Aug 20253012 AMAQI
9th Aug 2025281 AMAQI
9th Aug 2025492 AMAQI
9th Aug 2025603 AMAQI
9th Aug 2025624 AMAQI
9th Aug 2025585 AMAQI

20°C15/25°C

9th Aug 2025586 AMAQI
9th Aug 2025587 AMAQI
9th Aug 2025608 AMAQI
9th Aug 2025669 AMAQI
9th Aug 20256510 AMAQI
9th Aug 20255611 AMAQI
9th Aug 20253612 PMAQI
9th Aug 2025401 PMAQI
9th Aug 2025462 PMAQI
9th Aug 2025443 PMAQI
9th Aug 2025414 PMAQI
9th Aug 2025385 PMAQI
9th Aug 2025386 PMAQI
9th Aug 2025397 PMAQI
9th Aug 2025378 PMAQI
9th Aug 2025399 PMAQI
9th Aug 20255210 PMAQI
9th Aug 20255211 PMAQI
10th Aug 20255312 AMAQI
10th Aug 2025531 AMAQI
10th Aug 2025382 AMAQI
10th Aug 2025263 AMAQI
10th Aug 2025264 AMAQI
10th Aug 2025295 AMAQI

19°C14/26°C

10th Aug 2025306 AMAQI
10th Aug 2025307 AMAQI
10th Aug 2025308 AMAQI
10th Aug 2025309 AMAQI
10th Aug 20253310 AMAQI
10th Aug 20254211 AMAQI
10th Aug 20254512 PMAQI
10th Aug 2025461 PMAQI
10th Aug 2025392 PMAQI
10th Aug 2025383 PMAQI
10th Aug 2025374 PMAQI
10th Aug 2025385 PMAQI
10th Aug 2025396 PMAQI
10th Aug 2025417 PMAQI
10th Aug 2025428 PMAQI
10th Aug 2025399 PMAQI
10th Aug 20253710 PMAQI
10th Aug 20253811 PMAQI
11th Aug 20253812 AMAQI
11th Aug 2025371 AMAQI
11th Aug 2025362 AMAQI
11th Aug 2025343 AMAQI
11th Aug 2025314 AMAQI
11th Aug 2025295 AMAQI

19°C13/26°C

11th Aug 2025306 AMAQI
11th Aug 2025347 AMAQI
11th Aug 2025458 AMAQI
11th Aug 2025509 AMAQI
11th Aug 20255410 AMAQI
11th Aug 20255311 AMAQI
11th Aug 20255612 PMAQI
11th Aug 2025511 PMAQI
11th Aug 2025472 PMAQI
11th Aug 2025463 PMAQI
11th Aug 2025464 PMAQI
11th Aug 2025425 PMAQI
11th Aug 2025466 PMAQI
11th Aug 2025407 PMAQI
11th Aug 2025408 PMAQI
11th Aug 2025409 PMAQI
11th Aug 20254510 PMAQI
11th Aug 20254611 PMAQI
12th Aug 20254512 AMAQI
12th Aug 2025471 AMAQI
12th Aug 2025442 AMAQI
12th Aug 2025423 AMAQI
12th Aug 2025504 AMAQI
12th Aug 2025445 AMAQI

22°C14/31°C

12th Aug 2025506 AMAQI
12th Aug 2025527 AMAQI
12th Aug 2025488 AMAQI
12th Aug 2025519 AMAQI
12th Aug 20255810 AMAQI
12th Aug 20255711 AMAQI
12th Aug 20255312 PMAQI
12th Aug 2025471 PMAQI
12th Aug 2025472 PMAQI
12th Aug 2025423 PMAQI
12th Aug 2025474 PMAQI
12th Aug 2025505 PMAQI
12th Aug 2025486 PMAQI
12th Aug 2025487 PMAQI
12th Aug 2025498 PMAQI
12th Aug 2025489 PMAQI
12th Aug 20254810 PMAQI
12th Aug 20254811 PMAQI
13th Aug 20254812 AMAQI
13th Aug 2025461 AMAQI
13th Aug 2025562 AMAQI
13th Aug 2025623 AMAQI
13th Aug 2025574 AMAQI
13th Aug 2025615 AMAQI

25°C17/35°C

13th Aug 2025636 AMAQI
13th Aug 2025667 AMAQI
13th Aug 2025628 AMAQI
13th Aug 2025629 AMAQI
13th Aug 20255710 AMAQI
13th Aug 20255611 AMAQI
13th Aug 20255712 PMAQI
13th Aug 2025601 PMAQI
13th Aug 2025552 PMAQI
13th Aug 2025573 PMAQI
13th Aug 2025584 PMAQI
13th Aug 2025555 PMAQI
13th Aug 2025586 PMAQI
13th Aug 2025577 PMAQI
13th Aug 2025578 PMAQI
13th Aug 2025549 PMAQI
13th Aug 20255610 PMAQI
13th Aug 20255511 PMAQI
14th Aug 20255612 AMAQI
14th Aug 2025561 AMAQI
14th Aug 2025582 AMAQI
14th Aug 2025583 AMAQI
14th Aug 2025624 AMAQI
14th Aug 2025605 AMAQI

26°C17/36°C

14th Aug 2025606 AMAQI
14th Aug 2025587 AMAQI
14th Aug 2025598 AMAQI
14th Aug 2025609 AMAQI
14th Aug 20256210 AMAQI
14th Aug 20255811 AMAQI
14th Aug 20255112 PMAQI
14th Aug 2025551 PMAQI
14th Aug 2025562 PMAQI
14th Aug 2025563 PMAQI
14th Aug 2025574 PMAQI
14th Aug 2025575 PMAQI
14th Aug 2025546 PMAQI
14th Aug 2025557 PMAQI
14th Aug 2025558 PMAQI
14th Aug 2025579 PMAQI
14th Aug 20255810 PMAQI
14th Aug 20255711 PMAQI
15th Aug 20255812 AMAQI
15th Aug 2025571 AMAQI
15th Aug 2025502 AMAQI
15th Aug 2025413 AMAQI
15th Aug 2025464 AMAQI
15th Aug 2025505 AMAQI

26°C18/33°C

15th Aug 2025406 AMAQI
15th Aug 2025387 AMAQI
15th Aug 2025408 AMAQI
15th Aug 2025359 AMAQI
15th Aug 20254210 AMAQI
15th Aug 20254311 AMAQI
15th Aug 20253112 PMAQI
15th Aug 2025341 PMAQI
15th Aug 2025362 PMAQI
15th Aug 2025333 PMAQI
15th Aug 2025374 PMAQI
15th Aug 2025355 PMAQI
15th Aug 2025336 PMAQI
15th Aug 2025367 PMAQI
15th Aug 2025348 PMAQI
15th Aug 2025469 PMAQI
15th Aug 20254410 PMAQI
15th Aug 20254511 PMAQI
16th Aug 20254612 AMAQI
16th Aug 2025471 AMAQI
16th Aug 2025502 AMAQI
16th Aug 2025583 AMAQI
16th Aug 2025584 AMAQI
16th Aug 2025545 AMAQI

22°C16/29°C

16th Aug 2025506 AMAQI
16th Aug 2025447 AMAQI
16th Aug 2025468 AMAQI
16th Aug 2025439 AMAQI
16th Aug 20254110 AMAQI
16th Aug 20253811 AMAQI
16th Aug 20254012 PMAQI
16th Aug 2025441 PMAQI
16th Aug 2025452 PMAQI
16th Aug 2025453 PMAQI
16th Aug 2025474 PMAQI
16th Aug 2025485 PMAQI
16th Aug 2025446 PMAQI
16th Aug 2025467 PMAQI
16th Aug 2025468 PMAQI
16th Aug 2025449 PMAQI
16th Aug 20254710 PMAQI
16th Aug 20254411 PMAQI
17th Aug 20254512 AMAQI
17th Aug 2025471 AMAQI
17th Aug 2025372 AMAQI
17th Aug 2025303 AMAQI
17th Aug 2025284 AMAQI
17th Aug 2025345 AMAQI

19°C15/23°C

17th Aug 2025336 AMAQI
17th Aug 2025237 AMAQI
17th Aug 2025268 AMAQI
17th Aug 2025249 AMAQI
17th Aug 20252610 AMAQI
17th Aug 20252511 AMAQI
17th Aug 20252412 PMAQI
17th Aug 2025281 PMAQI
17th Aug 2025302 PMAQI
17th Aug 2025343 PMAQI
17th Aug 2025304 PMAQI
17th Aug 2025325 PMAQI
17th Aug 2025336 PMAQI
17th Aug 2025347 PMAQI
17th Aug 2025298 PMAQI
17th Aug 2025339 PMAQI
17th Aug 20253210 PMAQI
17th Aug 20253211 PMAQI
18th Aug 20253212 AMAQI
18th Aug 2025321 AMAQI
18th Aug 2025212 AMAQI
18th Aug 2025223 AMAQI
18th Aug 2025184 AMAQI
18th Aug 2025165 AMAQI

18°C11/23°C

18th Aug 2025196 AMAQI
6 AM
18th Aug 2025177 AMAQI
18th Aug 2025188 AMAQI
18th Aug 2025199 AMAQI
18th Aug 20252510 AMAQI
18th Aug 20252711 AMAQI
18th Aug 20252812 PMAQI
18th Aug 2025301 PMAQI
1 PM
18th Aug 2025262 PMAQI
18th Aug 2025243 PMAQI
9 PM
1 AM
5 AM

--°C/°C

Day time
Avg. Highest Time
8 AM - 10 AM

35AQI

3 hours / Day
90 hours / Month
Avg. Lowest Time
11 AM - 9 PM

31AQI

11 hours / Day
330 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 8 AM to 10 AM (Avg. 35), while the lowest AQI was between 11 AM to 9 PM (Avg. 31).
Night time
Avg. Highest Time
12 AM - 11 PM

32AQI

8 hours / Day
240 hours / Month
Avg. Lowest Time
12 AM - 11 PM

32AQI

8 hours / Day
240 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 12 AM to 11 PM (Avg. 32), while the lowest AQI was between 12 AM to 11 PM (Avg. 32).

2025 Days Vs Air Quality

Sint Niklaas, Flanders, Belgium

2025

69%

159

27%

61

4%

9

Total number of days with different AQI categories in last 230 days in 2025 (135 days remaining)

Good
159 Days
Moderate
61 Days
Poor
9 Days
Unhealthy
0 Days
Severe
0 Days
Hazardous
0 Days

Under WHO’s Safe Air Quality Limits: 69%

Health Risk Level:

Moderate

In 2025, 69% of 230 days were within WHO’s safe air quality limits, and 31% exceeded them. The risk of health issues is Moderate, particularly for individuals with respiratory or heart conditions.

Annual Air Quality Insights

Sint Niklaas, Flanders, Belgium

AQI levels in 2025

AQI
PM2.5
PM10
CO
SO2
NO2
O3
Sun.Mon.Tue.Wed.Thu.Fri.Sat.

Jan.

Feb.

Mar.

Apr.

May

Jun.

Jul.

Aug.

Sep.

Oct.

Nov.

Dec.

1st January 2025
30AQI
2nd January 2025
23AQI
3rd January 2025
27AQI
4th January 2025
58AQI
5th January 2025
33AQI
6th January 2025
21AQI
7th January 2025
20AQI
8th January 2025
32AQI
9th January 2025
28AQI
10th January 2025
57AQI
11th January 2025
99AQI
12th January 2025
65AQI
13th January 2025
69AQI
14th January 2025
86AQI
15th January 2025
93AQI
16th January 2025
62AQI
17th January 2025
81AQI
18th January 2025
74AQI
19th January 2025
93AQI
20th January 2025
112AQI
21st January 2025
85AQI
22nd January 2025
78AQI
23rd January 2025
59AQI
24th January 2025
27AQI
25th January 2025
32AQI
26th January 2025
28AQI
27th January 2025
17AQI
28th January 2025
20AQI
29th January 2025
26AQI
30th January 2025
33AQI
31st January 2025
51AQI
1st February 2025
60AQI
2nd February 2025
68AQI
3rd February 2025
104AQI
4th February 2025
70AQI
5th February 2025
76AQI
6th February 2025
65AQI
7th February 2025
55AQI
8th February 2025
67AQI
9th February 2025
64AQI
10th February 2025
138AQI
11th February 2025
92AQI
12th February 2025
86AQI
13th February 2025
106AQI
14th February 2025
118AQI
15th February 2025
88AQI
16th February 2025
61AQI
17th February 2025
70AQI
18th February 2025
78AQI
19th February 2025
81AQI
20th February 2025
80AQI
21st February 2025
53AQI
22nd February 2025
48AQI
23rd February 2025
43AQI
24th February 2025
23AQI
25th February 2025
50AQI
26th February 2025
36AQI
27th February 2025
29AQI
28th February 2025
37AQI
1st March 2025
42AQI
2nd March 2025
65AQI
3rd March 2025
92AQI
4th March 2025
129AQI
5th March 2025
107AQI
6th March 2025
84AQI
7th March 2025
59AQI
8th March 2025
71AQI
9th March 2025
89AQI
10th March 2025
125AQI
11th March 2025
83AQI
12th March 2025
32AQI
13th March 2025
40AQI
14th March 2025
32AQI
15th March 2025
42AQI
16th March 2025
44AQI
17th March 2025
38AQI
18th March 2025
34AQI
19th March 2025
48AQI
20th March 2025
57AQI
21st March 2025
62AQI
22nd March 2025
38AQI
23rd March 2025
24AQI
24th March 2025
84AQI
25th March 2025
121AQI
26th March 2025
57AQI
27th March 2025
66AQI
28th March 2025
75AQI
29th March 2025
39AQI
30th March 2025
36AQI
31st March 2025
36AQI
1st April 2025
39AQI
2nd April 2025
42AQI
3rd April 2025
56AQI
4th April 2025
62AQI
5th April 2025
46AQI
6th April 2025
20AQI
7th April 2025
34AQI
8th April 2025
48AQI
9th April 2025
55AQI
10th April 2025
47AQI
11th April 2025
62AQI
12th April 2025
74AQI
13th April 2025
49AQI
14th April 2025
28AQI
15th April 2025
39AQI
16th April 2025
24AQI
17th April 2025
39AQI
18th April 2025
49AQI
19th April 2025
44AQI
20th April 2025
48AQI
21st April 2025
45AQI
22nd April 2025
57AQI
23rd April 2025
39AQI
24th April 2025
63AQI
25th April 2025
51AQI
26th April 2025
65AQI
27th April 2025
46AQI
28th April 2025
57AQI
29th April 2025
52AQI
30th April 2025
49AQI
1st May 2025
48AQI
2nd May 2025
70AQI
3rd May 2025
50AQI
4th May 2025
22AQI
5th May 2025
23AQI
6th May 2025
23AQI
7th May 2025
32AQI
8th May 2025
27AQI
9th May 2025
25AQI
10th May 2025
26AQI
11th May 2025
26AQI
12th May 2025
23AQI
13th May 2025
40AQI
14th May 2025
42AQI
15th May 2025
44AQI
16th May 2025
36AQI
17th May 2025
36AQI
18th May 2025
38AQI
19th May 2025
35AQI
20th May 2025
30AQI
21st May 2025
42AQI
22nd May 2025
30AQI
23rd May 2025
20AQI
24th May 2025
29AQI
25th May 2025
20AQI
26th May 2025
30AQI
27th May 2025
20AQI
28th May 2025
22AQI
29th May 2025
27AQI
30th May 2025
25AQI
31st May 2025
41AQI
1st June 2025
39AQI
2nd June 2025
28AQI
3rd June 2025
27AQI
4th June 2025
22AQI
5th June 2025
18AQI
6th June 2025
18AQI
7th June 2025
14AQI
8th June 2025
18AQI
9th June 2025
44AQI
10th June 2025
57AQI
11th June 2025
42AQI
12th June 2025
47AQI
13th June 2025
55AQI
14th June 2025
49AQI
15th June 2025
35AQI
16th June 2025
35AQI
17th June 2025
36AQI
18th June 2025
35AQI
19th June 2025
36AQI
20th June 2025
34AQI
21st June 2025
32AQI
22nd June 2025
29AQI
23rd June 2025
23AQI
24th June 2025
24AQI
25th June 2025
23AQI
26th June 2025
27AQI
27th June 2025
28AQI
28th June 2025
20AQI
29th June 2025
18AQI
30th June 2025
25AQI
1st July 2025
31AQI
2nd July 2025
38AQI
3rd July 2025
24AQI
4th July 2025
22AQI
5th July 2025
21AQI
6th July 2025
18AQI
7th July 2025
20AQI
8th July 2025
21AQI
9th July 2025
26AQI
10th July 2025
27AQI
11th July 2025
24AQI
12th July 2025
23AQI
13th July 2025
25AQI
14th July 2025
38AQI
15th July 2025
28AQI
16th July 2025
25AQI
17th July 2025
24AQI
18th July 2025
24AQI
19th July 2025
34AQI
20th July 2025
36AQI
21st July 2025
19AQI
22nd July 2025
20AQI
23rd July 2025
20AQI
24th July 2025
26AQI
25th July 2025
31AQI
26th July 2025
39AQI
27th July 2025
25AQI
28th July 2025
25AQI
29th July 2025
33AQI
30th July 2025
29AQI
31st July 2025
26AQI
1st August 2025
21AQI
2nd August 2025
20AQI
3rd August 2025
22AQI
4th August 2025
25AQI
5th August 2025
22AQI
6th August 2025
26AQI
7th August 2025
27AQI
8th August 2025
31AQI
9th August 2025
48AQI
10th August 2025
37AQI
11th August 2025
42AQI
12th August 2025
48AQI
13th August 2025
57AQI
14th August 2025
57AQI
15th August 2025
41AQI
16th August 2025
47AQI
17th August 2025
32AQI

52AQI

70AQI

63AQI

48AQI

32AQI

31AQI

27AQI

35AQI

No. of days

Jan.Feb.Mar.Apr.MayJun.Jul.Aug.Sep.Oct.Nov.Dec.Total Days

202545AQI

15
15
1
7
17
4
14
13
4
19
11
30
1
28
2
31
15
2
159
61
9

Highest AQI recorded in

February

70AQI

Lowest AQI recorded in

July

27AQI

202438AQI

18
13
26
3
21
10
30
20
11
24
6
29
2
28
3
22
8
28
3
17
13
23
8
286
80

Highest AQI recorded in

January

46AQI

Lowest AQI recorded in

April

23AQI

202337AQI

3
23
8
20
10
22
9
19
11
30
1
29
2
24
5
1
27
4
27
2
21
10
245
62
1

Highest AQI recorded in

May

47AQI

Lowest AQI recorded in

July

26AQI

202244AQI

16
12
3
19
2
7
20
4
18
12
19
12
28
2
23
1
1
27
1
23
6
4
185
68
7

Highest AQI recorded in

March

73AQI

Lowest AQI recorded in

November

25AQI

202150AQI

14
16
7
20
14
13
3
1
15
12
3
26
5
12
18
19
12
25
6
14
16
22
9
16
14
16
15
200
156
6
1

Highest AQI recorded in

March

65AQI

Lowest AQI recorded in

August

37AQI

202044AQI

7
4
2
6
14
1
17
1
23
7
29
2
20
9
2
21
7
2
27
4
14
12
4
22
7
1
186
67
12

Highest AQI recorded in

November

60AQI

Lowest AQI recorded in

July

28AQI

Most & Least Polluted Years Over the Last 6 Years

Most Polluted Year Recorded
2021(Avg.)
50AQI
Least Polluted Year Recorded
2023(Avg.)
37AQI

Sint Niklaas's annual 2025 AQI (45) shows an average percentage change of 6.9% (worsened AQI) compared to previous years: 2020 (44), 2021 (50), 2022 (44), 2023 (37), 2024 (38).