Open Data Insight of the Day

Therwil is a municipality in the Bezirk Arlesheim, situated in the Leimental valley at an altitude of 308 meters above sea level. It covers a total surface area of 766 hectares. Table 2 summarizes the key features of the municipality, and figure 1 shows its location on the map.

The history of Therwil is rich and varied, with evidence of settlement dating back to the Stone Age, as well as Roman and early medieval periods. First mentioned in 1223, it was transferred from the Counts of Thierstein to the Reichenau Monastery, later becoming part of the Bishopric of Basel in 1518 and joining the city of Basel's jurisdiction in 1525. The village experienced plundering during the Thirty Years' War and was under French rule from 1792 to 1815 before being incorporated into the canton of Basel at the Congress of Vienna. More details can be found on its Wikipedia page.

In 2024, Therwil had a population of 10,157 residents. Of these, 8,135 were Swiss citizens and 2,022 were foreigners, making the foreign population proportion 19.91 percent. The age distribution shows 1,743 young people aged 0-17, 6,028 of working age between 18 and 65, and 2,386 older adults over 65. The gender ratio is slightly skewed towards women, with 5,239 women and 4,918 men. Therwil ranks 11th in total population among the 86 municipalities of Baselland. Table 2 shows the population by age groups since 2005.

Land use in Therwil is divided primarily between agriculture and settlement. The total surface of 766 hectares is composed of 29.6 percent settlement area, 45.2 percent agricultural area, and 24.3 percent forest, with the remaining 0.9 percent being unproductive surface.

Therwil generates substantial tax revenue, ranking 10th in the canton for total tax revenue. The municipal tax multiplier and its rank among the 86 municipalities are not specified in the provided data, but the high total revenue indicates a strong fiscal position.

Energy consumption in Therwil for 2022 was dominated by electricity, natural gas, and heating oil. Electricity consumption totaled 31,744.58 MWh, natural gas 29,285.09 MWh, and heating oil 28,360.05 MWh. Other sources included wood, photovoltaics, thermal solar energy, and ambient heat. Electricity is a good energy carrier for comparison, as it is used in all communities. Therwil's electricity consumption per capita is 3.2 MWh, ranking it 52nd among all municipalities in the canton, placing it in the middle range. Very low or very high per capita consumption can be influenced by the presence or absence of industrial activity.

The vehicle stock in Therwil as of 2026 includes 5,159 passenger cars and delivery vans. Of these, 4,180 are powered by combustion engines, mainly petrol or diesel, and 979 are electric vehicles, resulting in an electric vehicle ratio of 19 percent. This data is summarized in table 3.

Waste recycling data for 2024 shows Therwil's performance across different categories. For glass, 32 kg per capita were recycled, ranking 12th in the canton. For green waste, 97 kg per capita were recycled, ranking 39th. For household and bulky waste, 120 kg per capita were recycled, ranking 64th. For paper and cardboard, 47 kg per capita were recycled, ranking 14th. For tinplate and aluminum, 2 kg per capita were recycled, ranking 16th. With two categories ranked within the top 16, Therwil demonstrates a strong overall recycling performance. Table 4 provides total recycled waste, recycled waste per capita, and canton-wide comparison values.