Abstract: An evaporative cooling system for evaporatively cooling poultry houses, livestock houses and/or botanical structures, wherein the evaporative cooling system is capable of continually maintaining a sufficient supply of water within a reservoir and trough system, thus eliminating the occurrence of pump deactivation typically associated with low water level conditions, and promoting a more uniform distribution and quantity of water over the cooling pads of the evaporative cooling system for a more efficient and sustained cooling process.