Major river: Peyar, Ullar, Karaiyar, Servalar, Pampar, Manimuthar, Varahanatha, Ramanathi, Jambunatha, Gadana nathi, Kallar, Karunaiyar, Pachaiyar, Chittar, Gundar, Aintharuviar, Hanumanathi, Karuppanathi and Aluthakanniar
Water Systems : 8 dams and 875 tanks
(IWS & PWD, 2017)
Built up area : 279.45 sq.km (NRSC, 2015)
Tirunelveli Corporation area : 108.65 sq.km
(District Statistical Handbook, 2021-2022)