Identifying untapped potential: a geospatial analysis of Florida and California's 2009 recycled water production

Abstract

Increased water demand attributed to population expansion and reduced freshwater availability caused by saltwater intrusion and drought, may lead to water shortages. These may be addressed, in part, by use of recycled water. Spatial patterns of recycled water use in Florida and California during 2009 were analyzed to detect gaps in distribution and identify potential areas for expansion. Databases of recycled water products and distribution centers for both states were developed by combining the 2008 Clean Water Needs Survey database with Florida's 2009 Reuse Inventory and California's 2009 Recycling Survey, respectively. Florida had over twice the number of distribution centers (n = 426) than California (n = 228) and produced a larger volume of recycled water (674.85 vs. 597.48 mgd (3.78 mL/d = 1 mgd), respectively). Kernel Density Estimation shows the majority of distribution in central Florida (Orlando and Tampa), California's Central Valley region (Fresno and Bakersfield), and around major cities in California. Areas for growth were identified in the panhandle and southern regions of Florida, and northern, southwestern, and coastal California. Recycled water is an essential component of integrated water management and broader adoption of recycled water will increase water conservation in water-stressed coastal communities by allocating the recycled water for purposes that once used potable freshwater.

Keywords

• California water supply
• Florida water supply
• kernel density estimation
• recycled water products
• water resources
• water reuse