Reinforced concrete water tanks are crucial for water storage, designed to endure natural forces like seismic activity, wind, and temperature changes. The durability of these tanks is vital to avoid water loss, service disruptions, and safety risks. This study evaluates the performance of a 50,000-gallon RCC water tank, focusing on the effects of corrosion from atmospheric conditions and hydrostatic loads. Located in Jhajjar Kotli, Jammu, India, the tank was constructed using advanced techniques and materials to enhance structural integrity and performance. It features a height of 6.3 m, a diameter of 9 m, and a total load of 3568.6 KN. Advanced methods such as geo-grids and geo-membranes were utilized to improve load distribution and waterproofing, while sensors monitored the tank’s condition in real time. The concrete mix included chemical admixtures and crystalline waterproofing, which significantly improved water resistance and durability. The study found that geo-grids enhanced soil bearing capacity by up to 50%, geo-membranes reduced leakage to nearly zero, and crystalline waterproofing decreased water permeability by up to 90%. Despite a 15% increase in initial costs, the use of these technologies led to a 35% reduction in maintenance costs over the years, demonstrating substantial lifecycle savings and enhanced performance.