URL des Documents de travail : http://ces.univ-paris1.fr/cesdp/CESFramDP2010.htmDocuments de travail du Centre d'Economie de la Sorbonne 2010.51 - ISSN : 1955-611XUsing a unique cross-section sample from 10 OECD countries, we estimate willingness to pay for better quality of tap water. On the pooled sample, households are only willing to pay 7.5% of the median annual water bill to improve the quality of tap water. The highest relative willingness to pay for better tap water quality was found in the countries with the highest percentage of respondents being unsatisfied with tap water quality because of health concerns. The median willingness to pay in Mexico, Korea and Italy was estimated at 10.1%, 6.4% and 8.8% of the median water bill. The...