Steve Williams, A Decentralised Water System: Complementing the Centralised System with a Rain Harvesting Stormwater Utility, The Solutions Journal, Volume 9, Issue 3, July 2018, ( Abstract: Introduction This proposal will explain how using rainwater harvesting as a Best Management Practice (BMP) to reduce flows during rain events and provide the water for non-potable needs can benefit a utility. Water captured from storm events can be sold to customers needing non-potable water through the leasing of tanks for a flat fee and access via hydrants to water from larger tanks. If the water rate is high enough the utility will recoup there cost with in the lifecycle of the system and with an acceptable rate of return. For example Gwinnett County’s in Georgia irrigation rate of $9.70 per 1000 gallons would bring a positive return on the investment of 11 years and Athens/Clarke County rate of $13.50 per 1000 gallons is around 8 years with a life cycle of 20-30 years or more depending on the tank choice. [caption id="attachment_8757" align="alignright" width="508" ]Fig. 1[/caption] The idea of a decentralized system came to me in stages after I realized the potential … Topics: