AWWA WQTC71642

The City of Phoenix, Arizona, has participated forseveral years in the Central Arizona Salinity Study (CASS), the Multi-State SalinityCoalition (MSSC), and numerous related initiatives and efforts to understand the sources,impacts, and implications of increasing levels of total dissolved solids (TDS) in reclaimed water.A number of possible TDS strategies are currently being developed and evaluated by theCity to address TDS holistically. These include source control, treatment at potablewater plants, sanitary sewer point and non-point sources, and treatment of reclaimedwater to reduce TDS concentrations. The City conducted a study togather information regarding theimplementation of policies to control TDS discharges associated with residential point-of-use watersoftening and other treatment systems.As with many water quality problems, a multi-point approach is necessary to control TDSto maximize the value of developed water resources. This presentation will provide anoverview of the City's concerns regarding TDS, the efforts involved at controlling it,reasons for why some control strategies do not have support, and a summary of theCitywide Point-of-Use Water Softener and Treatment Study results. The study estimatedTDS contributions from various sources, identified TDS control programs, describedalternatives to ion exchange water softening, evaluated potential TDS reduction programcomponents, and identified TDS goals (concentration targets) for reclaimed water uses. Includes abstract only.

Product Details

Edition:

Vol. - No.

Published:

11/01/2009

Number of Pages:

1

File Size:

1 file , 720 KB