Tartu

Series: Unverified Air, no. 21

Day: 23 October 2026

Place: Tartu linn, Estonia

NO₂ (red): 11.2 µg/m³, the day’s highest hour, 15:00 UTC

O₃ (blue): 42.5 µg/m³, the day’s highest hour, 18:00 UTC

Wind: from 108°, 17 km/h, at 15:00 UTC

Station code: EE0021A

Station type: urban background

Network: Estonian Air Quality Monitoring Network

Inlet height: 4 m

Instruments: O₃ horibaAPOA380; NO₂ horibaAPNA380

Coordinates: 58.37056 N, 26.73472 E

Buildings: 99, 2.8–17.7 m high

Heights: 78 % measured, from the official building register (Estonia) via EUBUCCO

Lines: 3,166 black, 933 red, 699 blue

Line length: 56 m in total

Made: 24 October 2026, 09:03:04 UTC, in 169 s, on the gallery’s server in Helsinki, Finland

Size: A3, 297 × 420 mm (plotted); 2376 × 3360 px (this image)