Administrative Jurisdiction

Laguna de Bay basin is sub-divided into 24 hydrological sub-basins from which over 100 rivers and streams drain toward the lake. Twenty-two (22) of these are major river systems including one (1) outlet, the Pasig River through the Napindan Channel. These tributary rivers are the Pagsanjan River, the Sta. Cruz River, the Balanak River, the Marikina River, the Mangangate River, the Tunasan River, the San Pedro River, the Cabuyao River, the San Cristobal River, the San Juan River, the Bay, Calo and Maitem rivers in Bay, the Molawin, Dampalit and Pele Rivers in Los Baños, the Pangil River, the Tanay River, the Morong River, the Siniloan River, and the Sapang Baho River.