SmogRank / Breda / Schiedam

Breda vs Schiedam: PM2.5 compared

Over the last year, Schiedam's air was 24% more polluted than Breda's: PM2.5 averaged 11.4 µg/m³ against 9.2, on the 301 days both cities were measured. Schiedam had the dirtier air on 254 of those days, Breda on 45. Schiedam was over the WHO's daily guideline of 15 µg/m³ on 53 of them, Breda on 42.

Right now

Breda#98on the 24-hour board of 1,669, at 73 US AQI (20.7 µg/m³)
Schiedam#216on the 24-hour board of 1,669, at 64 US AQI (16.3 µg/m³)

The last year, day by day

Breda
Schiedam
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/m³Schiedam, Nov 2025: 10.6 µg/m³Nov 2025Breda, Dec: 10.6 µg/m³Schiedam, Dec: 12.8 µg/m³DecBreda, Jan 2026: 15.5 µg/m³Schiedam, Jan 2026: 19.3 µg/m³Jan 2026Breda, Feb: 10.0 µg/m³Schiedam, Feb: 14.3 µg/m³FebBreda, Mar: 14.7 µg/m³Schiedam, Mar: 17.0 µg/m³MarBreda, Apr: 8.0 µg/m³Schiedam, Apr: 10.2 µg/m³AprBreda, May: 7.7 µg/m³Schiedam, May: 9.9 µg/m³MayBreda, Jun: 5.8 µg/m³Schiedam, Jun: 8.3 µg/m³JunBreda, Jul: 5.0 µg/m³Schiedam, Jul: 6.8 µg/m³JulBreda, Aug: 5.7 µg/m³Schiedam, Aug: 7.8 µg/m³AugBreda, Sep: 7.4 µg/m³Schiedam, Sep: 7.7 µg/m³SepOct
Monthly means in µg/m³ over the days both cities were measured. Solid: Breda. Faded: Schiedam. A month shows once both share 10 such days. Dashed line: the WHO daily guideline.

Year by year

YearBredaSchiedamDays both measuredDays Breda was worse
2026 so far515622831
2025525629932
2024525215491
202354484534

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

Schiedam

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.

Schiedam

Side by side with Rotterdam, Gujranwala.

Use this page

SmogRank, PM2.5 daily means compared, Breda and Schiedam, 8 Oct 2025 – 6 Oct 2026, smogrank.com/compare/nl-breda/nl-schiedam (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.