The Ministry of Health is also involved in sanitary problems in rivers, together with environment authorities at state or national level. The most important and active institution related to water resources in the ministry is FUNASA, which is responsible for several important initiatives such as “Strategic Actions in Environmental Health”, “Education in Environmental Health”, Water Quality Control” and “Intervention in Flood Caused Disasters”. The ministry spearheads the programme “Co-operation in the Support to the Management of Sanitation Public Services” to help municipalities with less than 50 000 inhabitants in the prevention and control of environmental related diseases, especially due to poor sanitation conditions. Securing water for irrigation with an appropriate level of reliability is always an important constraint for river basin planning. Agriculture tends to resist paying water charges or abiding by stringent standards and regulations.