Bratislava vs Krompachy: PM2.5 compared

Over the last year, Krompachy's air was 42% more polluted than Bratislava's: PM2.5 averaged 13.5 µg/m³ against 9.5, on the 220 days both cities were measured. Krompachy had the dirtier air on 185 of those days, Bratislava on 33. Krompachy was over the WHO's daily guideline of 15 µg/m³ on 84 of them, Bratislava on 27.

Right now

Bratislava#1,764on the 24-hour board of 2,581, at 24 US AQI (4.3 µg/m³)

Krompachy#1,473on the 24-hour board of 2,581, at 30 US AQI (5.4 µg/m³)

The last year, day by day

Bratislava

Krompachy

Each city's daily mean from 13 Oct 2025 to 12 Oct 2026, one stripe a day, coloured by band. A blank stripe is a day without a daily mean.

Month by month

Monthly means in µg/m³ over the days both cities were measured. Solid: Bratislava. Faded: Krompachy. A month shows once both share 10 such days. Dashed line: the WHO daily guideline, 15 µg/m³.

Year by year

Year	Bratislava	Krompachy	Days both measured	Days Bratislava was worse
2026 so far	9.2	13.0	182	28
2025	12.1	15.3	279	84
2024	13.1	19.1	230	49

Means in µg/m³, as in the chart above, over the days both cities were measured that year; a year shows once they share 30 such days.

Each city's worst days

Bratislava

16 Apr 20268024.5 µg/m³
27 Jun 20267622.4 µg/m³
21 Mar 20267622.3 µg/m³

Krompachy

8 Oct 202610336.2 µg/m³
27 Jun 20269532.7 µg/m³
15 Mar 20269331.4 µg/m³

Daily means in US AQI, with µg/m³ beside them, since the index stops at its top value, over the days both cities were measured in the last year. Each date opens that day's world board.

Compare either city with another

Bratislava

Side by side with Hainburg an der Donau (the nearest), Čaňa (Slovakia's worst on 30 days), Gujranwala (the world's worst on 30 days).

Krompachy

Side by side with Prešov (the nearest), Čaňa (Slovakia's worst on 30 days), Gujranwala (the world's worst on 30 days).

Use this page

SmogRank, PM2.5 daily means compared, Bratislava and Krompachy, 13 Oct 2025 – 12 Oct 2026, smogrank.com/compare/sk-bratislava/sk-krompachy (accessed 13 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 2026-10-13 04:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the US AQI PM2.5 sub-index.