Provision of information by CARs to produce national aggregates is a key weakness in the system. However, further efforts are needed on environmental health monitoring and on information to better support policy making. The air quality monitoring system is not sufficient for assessing compliance with environmental standards at the national level (IAvH, IDEAM, IIAP, INVEMAR, SINCHI, 2011). Incompleteness of the water user registry hampers implementation of regulatory requirements for water management (IDEAM, 2010).