The Central Petén region is dominated by low lying rolling hills of porous Oligocene limestone, accounting for the limited amount of permanent surface water, even during the rainy season, there are few surface streams.  Most of the water consumed in Tikal in modern times is brought to the park by means of cistern trucks and is brought in from Lake Petén Itzá, 33 kilometers south of the park, the lake being the only nearby source of permanent surface water.  Very few collection tanks are in service at Tikal.  Some people used the water from the ancient Aguadas or Water Reservoirs.  However, these haven’t been maintained and the use of water from these reservoirs for human consumption is forbidden.  We found interesting information regarding the water reservoirs at Tikal, which we are including in this section… regarding the capacity of each of the Tikal Aguadas during the Maya’s Classic times at the site.