A method of monitoring fluid quality is described. At least one of raw fluid quality data and processed fluid quality data is communicated from one or more portable sensor units configured for wireless communication to one or more wireless transceivers, the raw fluid quality data and processed fluid quality data having been generated based upon measurements made using the portable sensor unit(s) at different locations corresponding to different points of fluid delivery. The locations are controlled by separate entities. At least one of the raw fluid quality data and the processed fluid quality data is communicated from the wireless transceiver(s) to a data collection system. At least one of the raw fluid quality data, the processed fluid quality data, and fluid quality measures derived therefrom is communicated to additional entities other than the separate entities.