Chloride-induced corrosion of reinforcing steel in concrete structures poses a significant threat, undermining the durability of the structure and leading to deterioration and costly repairs. Traditional methods of detecting chlorides are highly labor-intensive and time-consuming. This paper explores a non-destructive testing (NDT) technique that employs Wi-Fi signals to detect chloride ion concentrations in concrete for sustainable health monitoring. Samples with chloride concentrations of 0%, 5%, 10%, and 15% were prepared using both direct and indirect application methods for three different concrete strength grades. The specimens were placed inside Faraday's shield, where the signal attenuation of Wi-Fi was measured. The analysis revealed a direct correlation between signal attenuation, chloride content, and concrete strength. This demonstrates the efficacy of the NDT method for early chloride detection. The technique is straightforward and efficient for monitoring the health of structural components, ultimately enhancing the performance and durability of reinforced concrete structures.