Troja: nature and quiet

Troja: parks and greenery, noise by day and night, air, summer heat, radon, floods and tap water.

Parks, noise and air

Parks, noise and air – Troja
Photo: Aktron, CC BY-SA 3.0
17 %
of the area is parks and forests
About average Prague 18 %
22 %
of addresses have over 60 dB by day
About average Prague 25 %

Parks and forests in Troja

Details
83 m
typical walk to a park or forest
About average Prague 82 m
61 %
of the area is green, gardens included
Greener than average Prague 46 %
32 %
of addresses have over 50 dB at night
About average Prague 33 %

Parks, forests and greenery are counted from the neighbourhood’s area by current land use, the distance to a park or forest as the crow flies as the median over the neighbourhood’s addresses. We take the noise at the loudest point within 20 m of the address, usually the street-facing façade.

3.7 % of addresses in an unprotected flood zone (Prague 1.0 %), another 9.5 % protected by flood defences.
4. most at risk of floods of 85 neighbourhoods →
Air: NO₂ 18.7 µg/m³, PM2.5 12.5 µg/m³ (usual in the city NO₂ 18.2) · usual for the city. Average of 2020–2024.
56. cleanest air of 85 neighbourhoods →
In summer the surface here is 1.4 °C cooler than the city average. Surface temperature from Landsat satellite images, summers 2024–2025.
Which neighbourhoods stay coolest in summer →
Trees and shrubs cover 31 % of the area, sealed surfaces 36 %. Copernicus satellite land-cover map, 2021.
19. most trees of 85 neighbourhoods →
Bedrock radon index: mostly low (city-wide high at 2 %). A measurement decides for a specific plot.
31. lowest radon of 85 neighbourhoods →
No address on undermined land or on a slope deformation.

Frequently asked questions

Is there traffic noise in Troja?

22 % of addresses have daytime traffic noise above 60 dB (strategic noise map). The median of the city’s neighbourhoods is 21 %.

How far is a park or forest from Troja?

Half of the addresses have a park or forest within 83 m. The median of the city’s neighbourhoods is 85 m.

Is Troja in a flood zone?

3.7 % of the addresses in Troja lie in an unprotected 100-year flood zone. City-wide it is 1.0 % of addresses. Another 9.5 % lie in an area protected by flood barriers.

What is the radon index in Troja?

By the Czech Geological Survey map, the bedrock under Troja has a mostly low radon index; no address has a high one (city-wide 1.9 % of addresses). A measurement decides for a given house.

← Back to the overview of Troja

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