Electric vehicles (EVs) are penetrating rapidly into the transport sector, profoundly impacting the electricity and energy sectors. While EVs bring many benefits, they present challenges to utility grid operators, particularly during charging their batteries. Uncoordinated charging stands out as a critical charging strategy requiring attention to mitigate potential adverse effects on power grids. Smart charging and vehicle-to-grid (V2G) technologies enable intelligent and bidirectional power transfer between the EV and the grid taking into account network conditions and requirements. However, the widespread adoption of these technologies depends on the formulation of effective infrastructure and regulatory frameworks. This paper presents the effects of unmanaged charging of EVs on the utility grid power quality such as voltage violations, utility assets overloading and harmonic distortion. The paper also sheds light on some mitigation strategies incorporated in literature to reduce the adverse effects of EV integration.