partial information is available on infrastructure needs and on the costs of water resources management in the oecd and big economies annual expenditures in the range of usd billion are projected up to and over usd trillion by see oecd not least in oecd countries environmental pressures will continue to grow as will the expectations of the general public with respect to environmental protection and natural resource management these factors are expected to add significantly to the costs incurred in the supply of water services and wastewater treatment