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Water is about to become a scarce resource, due to the population growth that increases the demand or even because of the offer reduction, especially due to water springs ́ pollution. One of the alternatives to face this problem is the Water Reuse technique, an important instrument to water management and owner of high technologies to its properly utilization. The aim of this paper is to establish a protocol for using the Non-potable Water Reuse practice in residential condominiums, an upcoming stile of living, usually located at big cities surroundings, where the public potable water supply and the sewage transport are inaccessible. Besides that, there are restrictions to discharge these treated effluents into water courses. Considering the limitation of Brazilian water reuse legislation, and the uncertainties about the public health ́s risks concerning the reuse practice, it is necessary to adopt the Precautionary Principle, in which the option of reuse can be employed if the adequate practices and technologies are applied to this purpose. A risk management based on preventive measures like the HACCP (Hazard Analysis and Critical Control Point) consists in one of the best options for the evaluation of water reuse practice. By bibliography review, HACCP ́s method application and data collection of a real case study on Valville I a residential condominium in Santana do Parnaíba/SP, a proposal of guidelines was elaborated to adopt the non-potable water reuse practice inside the residential condominiums. These guidelines considered the hazards and critical control points in a water reuse system in a condominium, the emergency procedures, suggestions of quality parameters for the reuse water and also some ways of teaching and involving the community. This is a contribution for a better understanding of a more detailed regulation for water reuse programs that are enforced by law in some cities.

Diretrizes para implantação de sistemas de reúso de água em condomínios residenciais baseadas no método APPCC - análise de perigos e pontos críticos de controle: estudo de caso Residencial Valville I.