 As of 2000, there were 2.5 million water connections with 67% of these being domestic and this only accounts for legal connections.It is estimated that there could be another 900,000 illegal connections.The State of Mexico operates the 49-km water transmission line (the "Macrocircuito") to transport water entering from the west side of the service area (including the imported water from the Cutzamala-Lerma System) to the east side.