A proliferation of hotels in major cities in developing countries such as Benin leads to more waste water production. The present work aims to evaluate the efficiency of the wastewater treatment methods of Cotonou hotels. But after investigation, most hotels do not have a wastewater treatment plant. During the investigation, wastewater samples were collected and analyzed. The measurement of the field parameters was made with a pH meter, a conductivity meter and a turbidimeter. BOD5 was measured by respirometry and COD by colorimetry. A molecular absorption spectrophotometer was used to measure: suspended matter, total nitrogen and total phosphorus content. Microbiological parameters were determined by the incorporation technique. These analyzes show that the effluents at the entrance of the stations are heavily loaded with pollutants. However, significant declines are observed on site n°4 (activated sludge) with non-standard values only for phosphorus and Escherichia coli. The adoption of a disinfection and phosphorus removal treatment would make it possible to obtain water of acceptable quality for reuse of these waters in irrigation.