Regional water may be differing from potable water characteristics in terms of pH, total solids, turbidity, chlorides. hardness etc. and it is essential to know whether this variation has positive or negative effects on concrete. In this study, mixing water is regarded non- potable with regards to its pH. In an attempt to generalise the results irrespective of variation in regional properties of water, the acidic and alkaline mixing water is artificially made in the laboratory using standard acid and base. The pH values of the engineered mixing water include pH5, pH7 and pH9; pH 7 being the control. The study examines the effect of pH of mixing water on compressive, tensile, flexural and durability properties of plain cement concrete. The concrete specimens show minor increase in strength properties. © 2023 Elsevier B.V., All rights reserved.