Chalais

Chalais has an area, as of 2009, of 24.5 square kilometers . Of this area, 4.65 km2 or 19.0% is used for agricultural purposes, while 16.55 km2 or 67.7% is forested. Of the rest of the land, 2.07 km2 or 8.5% is settled , 0.02 km2 or 0.1% is either rivers or lakes and 1.16 km2 or 4.7% is unproductive land.
Of the built up area, housing and buildings made up 5.4% and transportation infrastructure made up 1.9%. Out of the forested land, 64.3% of the total land area is heavily forested and 3.1% is covered with orchards or small clusters of trees. Of the agricultural land, 0.4% is used for growing crops and 4.3% is pastures, while 4.7% is used for orchards or vine crops and 9.6% is used for alpine pastures. All the water in the municipality is flowing water. Of the unproductive areas, 3.0% is unproductive vegetation and 1.8% is too rocky for vegetation.

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