In this work we present recent data on the dielectric properties and conductivity of anionic polystyrene suspensions. Our main aim is to analyze how such properties correlate with the zeta potential of the particles and the electrolyte concentration in the dispersion medium. The results will be compared to the predictions of the standard dielectric model of suspensions (DeLacey, E. H. B., and White, L. R., J. Chem. Soc., Faraday Trans. 2 77, 2007 (1981)). Our data indicate that the correlation between the properties analyzed and both the zeta potential and electrolyte concentration follows qualitatively the predictions of the standard model in all cases. Like previously reported results, data presented here confirm that more general models, that include dynamic processes in the inner part of the double layer are needed to explain the dielectric response of colloidal systems.