A method often employed by Southern Demolition and Environmental for Dust Control during Demolition:
Fire Hydrant + Meter from Water Authority + Backflow Preventer + Fire Hose
Fire Hose typically comes in 50' lengths and can be attached to each other (depending upon fittings) to gain the length needed to efficiently move water to the jobsite. The meter measures the output which is charged by the water authority for the duration of the project.
The Backflow Preventer is important to keep unwanted backflow from the municipal water supply.