risk edges metal pumps debris strain leaves safety toilet Gutters regions factors laundry plastic cooking concrete drinking cisterns surfaces rooftops flooding pavements community individual less water Downspouts challenges popularity groundwater water bills disinfection intended use soil erosion Cost Savings water demand various uses potable uses storage tanks effectiveness Sustainability piping systems specific needs water scarcity storage systems available space intended points storage capacity several benefits basic filtration collection point potable purposes local regulations rainfall patterns various materials catchment surface initial investment collection systems proper maintenance valuable technique water conservation other contaminants additional treatment surface water bodies Rainwater harvesting other catchment areas infrastructure design underground reservoirs sustainable development treatment infrastructure other impermeable surface traditional water sources Allegiance Water Management advanced treatment processes existing water infrastructure potential water quality issues sustainable water management technique sustainable water management practices