(11)As a result of precipitation, such as rain, snow or meltwater, storm water overflows and urban runoff represent a sizeable remaining source of pollution discharged into the environment. Such overflows and runoff are expected to increase due to the combined effects of urbanisation and the progressive change of the rain regime linked with climate change. Urban wastewater management infrastructure is therefore particularly vulnerable to climate change. Solutions to reduce that source of pollution should be defined at local level, taking into account the specific local conditions. They should be based on an integrated quantitative and qualitative water management in urban areas. Therefore, Member States should ensure that integrated urban wastewater management plans are established at local level for all agglomerations of 100 000 p.e. and above as those agglomerations are responsible for a significant share of the pollution emitted. Furthermore, integrated urban wastewater management plans should also be put in place for agglomerations of between 10 000 p.e. and 100 000 p.e. where storm water overflows or urban runoff pose a risk for the environment or public health. In those plans, measures should be set out that aim at limiting the pollution from storm water overflows to no more than 2 % of the annual collected urban wastewater load calculated in dry weather flow conditions calculated on the basis of the pollutants in Tables 1 and 2 in Annex I.