In the Oder Basin, for example, some 500,000 and 150,000 additional people in the Polish and Czech parts, respectively, are expected to be connected to sewage systems between 2005 and 2015. Continuing investment will still be required to increase coverage, and maintain or replace ageing water supply and sanitation infrastructure. The high infrastructure costs of meeting the requirements of the UWWTD place a particular burden on new EU member States, who arc therefore given more time to achieve compliance.