SmogRank / Breda / Groningen

Breda vs Groningen: PM2.5 compared

Over the last year, Breda and Groningen had about the same air: PM2.5 averaged 9.0 and 9.1 µg/m³, on the 346 days both cities were measured. Breda had the dirtier air on 194 of those days, Groningen on 150. Breda was over the WHO's daily guideline of 15 µg/m³ on 42 of them, Groningen on 44.

Right now

Breda#98on the 24-hour board of 1,669, at 73 US AQI (20.7 µg/m³)
Groningen#395on the 24-hour board of 1,669, at 55 US AQI (11.4 µg/m³)

The last year, day by day

Breda
Groningen
Each city's daily mean from 7 Oct 2025 to 6 Oct 2026, one stripe a day, coloured by band. A blank stripe is a day without a daily mean.

Month by month

15Breda, Nov 2025: 9.4 µg/m³Groningen, Nov 2025: 9.0 µg/m³Nov 2025Breda, Dec: 10.7 µg/m³Groningen, Dec: 11.4 µg/m³DecBreda, Jan 2026: 15.1 µg/m³Groningen, Jan 2026: 19.6 µg/m³Jan 2026Breda, Feb: 10.0 µg/m³Groningen, Feb: 16.7 µg/m³FebBreda, Mar: 14.7 µg/m³Groningen, Mar: 14.4 µg/m³MarBreda, Apr: 8.0 µg/m³Groningen, Apr: 8.5 µg/m³AprBreda, May: 7.9 µg/m³Groningen, May: 6.4 µg/m³MayBreda, Jun: 5.2 µg/m³Groningen, Jun: 3.1 µg/m³JunBreda, Jul: 5.3 µg/m³Groningen, Jul: 4.1 µg/m³JulBreda, Aug: 5.4 µg/m³Groningen, Aug: 4.9 µg/m³AugBreda, Sep: 7.1 µg/m³Groningen, Sep: 5.9 µg/m³SepOct
Monthly means in µg/m³ over the days both cities were measured. Solid: Breda. Faded: Groningen. A month shows once both share 10 such days. Dashed line: the WHO daily guideline.

Year by year

YearBredaGroningenDays both measuredDays Breda was worse
2026 so far4952265145
20255243360267
20244939345237
20234841161101

Means in US AQI over the days both cities were measured that year; a year shows once they share 30 such days.

Each city's worst days

Breda

Groningen

Daily means in US AQI, over the days both cities were measured in the last year. Each date opens that day's world board.

Compare either city with another

Breda

Side by side with Tilburg, Venray, Gujranwala.

Groningen

Side by side with Kollum, Gujranwala.

Use this page

SmogRank, PM2.5 daily means compared, Breda and Groningen, 7 Oct 2025 – 6 Oct 2026, smogrank.com/compare/nl-breda/nl-groningen (accessed 6 Oct 2026).

You're welcome to reuse a single chart, image or figure with this citation and a link. Terms. Raw monitor readings in bulk are published by OpenAQ, under each provider's licence.

The same rules as every SmogRank figure: reference monitors first, and a day counts with 18 measured hours. How we measure.

Updated 2026-10-06 23:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the US AQI PM2.5 sub-index.