SmogRank / Asprópyrgos / Kastoria

Asprópyrgos vs Kastoria: PM2.5 compared

Over the last year, Asprópyrgos's air was 33% more polluted than Kastoria's: PM2.5 averaged 9.7 µg/m³ against 7.3, on the 133 days both cities were measured. Asprópyrgos had the dirtier air on 104 of those days, Kastoria on 28. Asprópyrgos was over the WHO's daily guideline of 15 µg/m³ on 5 of them, Kastoria on 3.

Right now

Asprópyrgos–not on the 24-hour board right now
Kastoria#1,082on the 24-hour board of 1,616, at 29 US AQI (5.3 µg/m³)

The last year, day by day

Asprópyrgos
Kastoria
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

15Nov 2025DecJan 2026FebMarAsprópyrgos, Apr: 10.2 µg/m³Kastoria, Apr: 7.4 µg/m³AprAsprópyrgos, May: 8.4 µg/m³Kastoria, May: 4.5 µg/m³MayAsprópyrgos, Jun: 9.6 µg/m³Kastoria, Jun: 5.5 µg/m³JunAsprópyrgos, Jul: 11.7 µg/m³Kastoria, Jul: 7.3 µg/m³JulAsprópyrgos, Aug: 11.4 µg/m³Kastoria, Aug: 11.3 µg/m³AugAsprópyrgos, Sep: 8.1 µg/m³Kastoria, Sep: 6.5 µg/m³SepOct
Monthly means in µg/m³ over the days both cities were measured. Solid: Asprópyrgos. Faded: Kastoria. A month shows once both share 10 such days. Dashed line: the WHO daily guideline.

Year by year

YearAsprópyrgosKastoriaDays both measuredDays Asprópyrgos was worse
2026 so far5239124101
2025515211545

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

Asprópyrgos

Kastoria

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

Asprópyrgos

Side by side with Acharnés, Kozáni, Gujranwala.

Kastoria

Side by side with Grevená, Gujranwala.

Use this page

SmogRank, PM2.5 daily means compared, Asprópyrgos and Kastoria, 19 Oct 2025 – 3 Oct 2026, smogrank.com/compare/gr-aspropyrgos/gr-kastoria (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 21:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the US AQI PM2.5 sub-index.