However, there does not appear to be a large margin for operators to also face the need to renew and replace ageing infrastructure, although very few countries provided data on this item. An analysis of specific cases (such as Finland, Switzerland or Belgium) suggested that efforts have been made to increase cost-recovery in many OECD countries, and in particular to cover the costs of wastewater management where larger investments are needed. These average figures hide some areas of “water poverty”, however, with WSS bills representing up to 4.2% or 7.9% of household income for the poorest decile in Mexico and Poland respectively.