The present invention relates generally to processes for adding a chemical composition to a produced water mixture upstream of a pad related to a well to be fracked. The added chemical composition comprises a drag reducing agent, or a biocide, or a scale inhibitor, or any combination thereof. The produced water mixture comprising the added chemical composition may then be transferred in a pipeline to the well to be fracked. This offers a number of advantages that may include, for example, reducing the footprint at the pad, improved efficacy of biocide, reduced time to transfer produced water, and/or reduced pumping time during the fracking.