Three important rivers flow through the district. These rivers originate from various mountains of the Western Ghats mountain range. The Pamba () which is the third longest river in kerala, has its origin in Pulachimala. The Achankovil river () originates from Pasukida Mettu, and Manimala river () originates from the Thattamalai hills. A small portion of Kallada river also falls in the southern border of the district. Pamba and Achankovil rivers together drain more than 70% of the total area of Pathanamthitta.

One third of the electricity produced in the State comes from this district. The Sabarigiri Hydroelectric project situated at the Pamba basin and the Kakkad Electricity project functions in this district. The abundant water resources are also utilized for irrigation purpose through the Kallada and Pamba irrigation projects.

Nalkalikkal bridge was built more than 50 years that was replaced with a new bridge and approach road a few years back. The name is derived from the words 'Nalu' (four) and 'Kal' (legs or spans in case of a bridge) as the old bridge had 4 spans. It connects Aranmula and nearby village 'Kidanganoor'.

జంతుజాలం
ప్రయాణవసతులు
నదులు
విద్య