ABSTRACT Objective: The study aims to analyse the fluoride concentration in water supply of capital each province Mozambique, 2019 and compare with previous data 1978 2008. Methods: cities Mozambique were analysed 1978, 2008 from Tete’s River 2019. samples was determined duplicate, using ion-sensitive electrode (Orion 9609), coupled a potentiometer (Procyon, model 720), adopting significance le...