For example, those related to bulk water supply or to wastewater treatment could be attributed to the water supply and sanitation sub-sector, while expenditures to buy back water rights from farmers in stressed aquifers could be attributed to the irrigation sub-sector. Depending on how water expenditures are classified, CONAGUA will spend around MXN 10-20 billion on water resources management (see Figure 3.7) in 2012. In addition, municipalities finance flood protection and CONAFOR contributes to watershed management.