Where is surface water most abundant in Guatemala? How much does it rain in the north and in Petén?

The Northern Transversal Strip and the north of Huehuetenango, Quiché and Alta Verapaz record up to about 5,550 mm a year, the highest in the country: surface abundance,… though this is also the area of the hydroelectric conflicts (Oxec, the Cahabón river). Petén and northern Alta Verapaz receive 1,000-2,500 mm a year with rain almost all year round: water available, little infrastructure. The values are a synthesis of balances from Wikipedia (Hidrografía de Guatemala).