This review provides a detailed examination of strategies for controlling the deposition of nanoparticles in porous media, emphasising the factors influencing their long-term stability and the challenges faced in practical applications. The review explores fundamental mechanisms of nanoparticle retention, including surface modification, intelligent materials, and optimised injection techniques, while discussing environmental and operational variables such as flow velocity, pH, ionic strength, and particle size. The review highlights innovative strategies to maintain nanoparticle stability over time, including responsive ligands, smart nanoparticles, self-healing coatings, and encapsulation techniques. Real-world case studies, including projects from Lockheed Martin, NanoRem, and NANO IRM, illustrate the practical application of these strategies in environmental remediation, emphasising the need for regulatory compliance and long-term monitoring. Overall, this review offers critical insights into the controlled application of nanoparticles for remediation, providing a roadmap for addressing the technical and regulatory challenges associated with their deployment in porous media.