<p><span style="font-size:14px"><span style="font-family:Arial,Helvetica,sans-serif">In order to comprehend the complex biological interactions occurring within an aquatic ecosystem an assessment of its physicochemical conditions holds a momentous position. Any changes encountered in these conditions have a direct bearing on the biota inhabiting therein. In the present study an investigation was made on the physicochemical conditions of three freshwater ponds of Jammu viz. Dilli Village Pond, Jammu; Botanical Garden Pond, University of Jammu and Fish Pond, University of Jammu, for a period of one year from May 2005 to April 2006 in which some physicochemical parameters (temperature, transparency, and pH, DO, FCO2, CO3&mdash;, HCO3-, Cl-, Ca++ and Mg++) were analysed. All the parameters showed well-marked seasonal fluctuations.</span></span></p>