The challenge of decentralized wastewater management in rural areas necessitates robust, low-cost technologies for greywater treatment. A study was conducted with the objective of analyzing the efficiency of four Horizontal Subsurface Flow Constructed Wetlands (HSFCW) in series for household greywater treatment using the macrophyte Typha angustifolia and a pumice substrate. The methodology involved five monitoring events over a 120-day period, with sampling at the inlet and outlet of each HSFCW. Field parameters, including pH (8.12) and water temperature (24ºC), as well as the final turbidity (8.2 NTU), were within permissible ranges. An increase in electrical conductivity was observed, reaching 1.982 mS/cm. Contaminant removal percentages were 97.52% for oils and greases, 96.66% for BOD5, 93.21% for COD, 98.11% for nitrates, 97.63% for total phosphorus, and 46.21% for TSS. The implementation of the HSFCW with Typha angustifolia and pumice substrate proved to be an efficient alternative for treating greywater, exhibiting a high potential for sustainable and decentralized solutions. This validated performance makes it suitable for future integration with real-time monitoring and smart management systems.