SmogRank / Belgium / Flanders

Air quality in Riemst

Flanders, Belgium. Over the last 24 hours its air rated Good, the 2,214th most polluted of 2,504 cities measured.

24-hour average14US AQI
Good

PM2.5 2.5 µg/m³, 0.2× the WHO 24-hour guideline. The figure the 24-hour ranking uses.

Latest hour: 7 US AQI (1.3 µg/m³), local time

Last 4 days, hour by hour

153011 Oct 20:00 local, 2026-10-11 18:00 UTC: 1.8 µg/m³11 Oct 21:00 local, 2026-10-11 19:00 UTC: 2.3 µg/m³11 Oct 22:00 local, 2026-10-11 20:00 UTC: 3.9 µg/m³11 Oct 23:00 local, 2026-10-11 21:00 UTC: 5.8 µg/m³12 Oct 00:00 local, 2026-10-11 22:00 UTC: 6.9 µg/m³12 Oct 01:00 local, 2026-10-11 23:00 UTC: 6.3 µg/m³12 Oct 02:00 local, 2026-10-12 00:00 UTC: 6.3 µg/m³12 Oct 03:00 local, 2026-10-12 01:00 UTC: 7.9 µg/m³12 Oct 04:00 local, 2026-10-12 02:00 UTC: 7.2 µg/m³12 Oct 05:00 local, 2026-10-12 03:00 UTC: 6.7 µg/m³12 Oct 06:00 local, 2026-10-12 04:00 UTC: 5.3 µg/m³12 Oct 07:00 local, 2026-10-12 05:00 UTC: 3.9 µg/m³12 Oct 08:00 local, 2026-10-12 06:00 UTC: 3.5 µg/m³12 Oct 09:00 local, 2026-10-12 07:00 UTC: 4.0 µg/m³12 Oct 10:00 local, 2026-10-12 08:00 UTC: 4.7 µg/m³12 Oct 11:00 local, 2026-10-12 09:00 UTC: 2.9 µg/m³12 Oct 12:00 local, 2026-10-12 10:00 UTC: 2.8 µg/m³12 Oct 13:00 local, 2026-10-12 11:00 UTC: 1.5 µg/m³12 Oct 14:00 local, 2026-10-12 12:00 UTC: 1.5 µg/m³12 Oct 15:00 local, 2026-10-12 13:00 UTC: 1.4 µg/m³12 Oct 16:00 local, 2026-10-12 14:00 UTC: 1.4 µg/m³12 Oct 17:00 local, 2026-10-12 15:00 UTC: 1.2 µg/m³12 Oct 18:00 local, 2026-10-12 16:00 UTC: 0.9 µg/m³12 Oct 19:00 local, 2026-10-12 17:00 UTC: 0.8 µg/m³12 Oct 20:00 local, 2026-10-12 18:00 UTC: 1.6 µg/m³12 Oct 21:00 local, 2026-10-12 19:00 UTC: 2.9 µg/m³12 Oct 22:00 local, 2026-10-12 20:00 UTC: 3.4 µg/m³12 Oct 23:00 local, 2026-10-12 21:00 UTC: 5.2 µg/m³13 Oct 00:00 local, 2026-10-12 22:00 UTC: 3.0 µg/m³13 Oct 01:00 local, 2026-10-12 23:00 UTC: 3.1 µg/m³13 Oct 02:00 local, 2026-10-13 00:00 UTC: 1.9 µg/m³13 Oct 03:00 local, 2026-10-13 01:00 UTC: 1.4 µg/m³13 Oct 04:00 local, 2026-10-13 02:00 UTC: 1.3 µg/m³13 Oct 05:00 local, 2026-10-13 03:00 UTC: 1.3 µg/m³Oct 10Oct 11Oct 12Oct 13
Riemst's local time; hover a bar for UTC. Dashed line: WHO 24-hour guideline (15 µg/m³).

Where Riemst ranks

24 hours#2,214of 2,504, at 14 US AQI (2.5 µg/m³)
7 days–not enough data
30 days–not enough data
This year–not enough data

Unhealthy days this year: 0 of 1 measured days had a daily mean over 35.4 µg/m³ (US AQI 101+).

Worst 6 hours since 6 Oct 2026: 32 US AQI (5.8 µg/m³) on 12 Oct, 00:00 to 06:00 local time, confirmed by 2 of its 2 monitoring places.

The last 12 months, day by day

1102031Nov 2025DecJan 2026FebMarAprMayJunJulAugSepOct2025-11-01: no monitor reporting here yet2025-11-02: no monitor reporting here yet2025-11-03: no monitor reporting here yet2025-11-04: no monitor reporting here yet2025-11-05: no monitor reporting here yet2025-11-06: no monitor reporting here yet2025-11-07: no monitor reporting here yet2025-11-08: no monitor reporting here yet2025-11-09: no monitor reporting here yet2025-11-10: no monitor reporting here yet2025-11-11: no monitor reporting here yet2025-11-12: no monitor reporting here yet2025-11-13: no monitor reporting here yet2025-11-14: no monitor reporting here yet2025-11-15: no monitor reporting here yet2025-11-16: no monitor reporting here yet2025-11-17: no monitor reporting here yet2025-11-18: no monitor reporting here yet2025-11-19: no monitor reporting here yet2025-11-20: no monitor reporting here yet2025-11-21: no monitor reporting here yet2025-11-22: no monitor reporting here yet2025-11-23: no monitor reporting here yet2025-11-24: no monitor reporting here yet2025-11-25: no monitor reporting here yet2025-11-26: no monitor reporting here yet2025-11-27: no monitor reporting here yet2025-11-28: no monitor reporting here yet2025-11-29: no monitor reporting here yet2025-11-30: no monitor reporting here yet2025-12-01: no monitor reporting here yet2025-12-02: no monitor reporting here yet2025-12-03: no monitor reporting here yet2025-12-04: no monitor reporting here yet2025-12-05: no monitor reporting here yet2025-12-06: no monitor reporting here yet2025-12-07: no monitor reporting here yet2025-12-08: no monitor reporting here yet2025-12-09: no monitor reporting here yet2025-12-10: no monitor reporting here yet2025-12-11: no monitor reporting here yet2025-12-12: no monitor reporting here yet2025-12-13: no monitor reporting here yet2025-12-14: no monitor reporting here yet2025-12-15: no monitor reporting here yet2025-12-16: no monitor reporting here yet2025-12-17: no monitor reporting here yet2025-12-18: 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reporting here yet2026-08-19: no monitor reporting here yet2026-08-20: no monitor reporting here yet2026-08-21: no monitor reporting here yet2026-08-22: no monitor reporting here yet2026-08-23: no monitor reporting here yet2026-08-24: no monitor reporting here yet2026-08-25: no monitor reporting here yet2026-08-26: no monitor reporting here yet2026-08-27: no monitor reporting here yet2026-08-28: no monitor reporting here yet2026-08-29: no monitor reporting here yet2026-08-30: no monitor reporting here yet2026-08-31: no monitor reporting here yet2026-09-01: no monitor reporting here yet2026-09-02: no monitor reporting here yet2026-09-03: no monitor reporting here yet2026-09-04: no monitor reporting here yet2026-09-05: no monitor reporting here yet2026-09-06: no monitor reporting here yet2026-09-07: no monitor reporting here yet2026-09-08: no monitor reporting here yet2026-09-09: no monitor reporting here yet2026-09-10: no monitor reporting here yet2026-09-11: no monitor reporting here yet2026-09-12: no monitor reporting here yet2026-09-13: no monitor reporting here yet2026-09-14: no monitor reporting here yet2026-09-15: no monitor reporting here yet2026-09-16: no monitor reporting here yet2026-09-17: no monitor reporting here yet2026-09-18: no monitor reporting here yet2026-09-19: no monitor reporting here yet2026-09-20: no monitor reporting here yet2026-09-21: no monitor reporting here yet2026-09-22: no monitor reporting here yet2026-09-23: no monitor reporting here yet2026-09-24: no monitor reporting here yet2026-09-25: no monitor reporting here yet2026-09-26: no monitor reporting here yet2026-09-27: no monitor reporting here yet2026-09-28: no monitor reporting here yet2026-09-29: no monitor reporting here yet2026-09-30: no monitor reporting here yet2026-10-01: no monitor reporting here yet2026-10-02: no monitor reporting here yet2026-10-03: no monitor reporting here yet2026-10-04: no monitor reporting here yet2026-10-05: no monitor reporting here yet2026-10-06: no monitor reporting here yet2026-10-07: no monitor reporting here yet2026-10-08: no monitor reporting here yet2026-10-09: no monitor reporting here yet2026-10-10: no monitor reporting here yet2026-10-11: no monitor reporting here yet2026-10-12: 3.8 µg/m³
0 of 1 measured days were over the WHO 24-hour guideline (15 µg/m³). One row per month, one square per local day.
Good0–50
Moderate51–100
Unhealthy for sensitive groups101–150
Unhealthy151–200
Very unhealthy201–300
Hazardous301+

The US EPA's Air Quality Index for PM2.5 (2024 breakpoints). Show values as: µg/m³ · US AQI · India AQI · China AQI · European AQI · UK DAQI · Canada AQHI+. About the scales

Every month since 2026: each year's mean, the worst months and days, and Riemst's place on each month's world ranking.

Monitors

4 listed: 0 reference, 4 low-cost

PM2.5 from 3 low-cost sensors, updated hourly. 1 more listed below isn't counted now: held back by our checks, or not reporting.

StationOperatorType
SDS011 29848ODbL 1.0 (Sensor.Community)Sensor.CommunityLow-costCounted
SPS30 87466ODbL 1.0 (Sensor.Community)Sensor.CommunityLow-costCounted
SPS30 87449ODbL 1.0 (Sensor.Community)Sensor.CommunityLow-costCounted
SDS011 25125ODbL 1.0 (Sensor.Community)Sensor.CommunityLow-costNot counted now

No reference monitor here, so the value is the median of low-cost sensors, when at least a third of them report (two at the least, three always enough). Low-cost sensors read close to reference monitors on the whole, but 15 to 25% high in humid air. These sensors are Sensor.Community's (Sensor.Community, ODbL), kept apart from any other source; the values they set are published under the ODbL on our sources page. Data from Sensor.Community, read from the publisher; licences as listed. How we rank. Embed this on your site.

Compare Riemst with another city

Side by side with Ans (the nearest), Meulebeke (Belgium's worst on 30 days), Gujranwala (the world's worst on 30 days).

Other cities in Belgium

30-day averages, US AQI. All of Belgium.

Updated 2026-10-13 03:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the US AQI PM2.5 sub-index. Some low-cost readings: Sensor.Community, ODbL (data and licence).