The book "geoENV I - Geostatistics for Environmental Applications" is a comprehensive collection of research papers presented at the first European Conference on Geostatistics for Environmental Applications held in 1996 in Lisbon. This conference brought together a wide range of researchers addressing environmental issues from various disciplines such as hydrogeology, biology, soil science, air pollution, and ecology. The collected contributions demonstrate the diversity and advancements in the application of geostatistics to environmental problems. The conference was a significant success, both in terms of the quantity and quality of the submitted works, and laid the foundation for future biennial meetings. This book serves as a valuable resource for professionals and students interested in the latest developments and challenges in geostatistics and its application to environmental issues.