In the worst case, therefore, the expense remains insignificant. Those who drink from the tap pay a thousand times less: even though in Ticino so far only 2 litres of tap water per day and person end up in dishes and glasses. According to the Dipartimento del territorio, Sezione della protezione dell'aria, dell'acqua e del suolo, the average per capita consumption of households is 242 litres per day and inhabitant. This is 57 litres more than the Swiss average (185 litres), but significantly less than in the past. In 2002, peak values of 530 litres were even reached, according to tables compiled by the Observatory for Spatial Development: today, consumption has become more sustainable, "thanks to improved infrastructures and a more rational use of water". 29 % end up in the toilet, 19.6 % in the bathtub or shower, 18.6 % in the washing machine, 17 % are used for cooking, drinking or washing dishes by hand; 12.8 % are used for personal hygiene and hand washing, 2.2 % for dishwashing, 2.3 % for garden watering and other purposes.