|Cobb County, Georgia Successfully Implements Efficiency-Oriented Rate Structure and Educates Customers through Targeted and Strategic Public Engagement Effort|
In 2006, Cobb County Water System in Metro Atlanta received a directive from the Metropolitan North Georgia Water Planning District to implement conservation rates. Anticipating strong opposition from its 175,000 customers, Cobb County assembled a core Rate Setting Team to develop and execute a robust public engagement effort that would support a successful rollout and implementation.
|Los Angeles Department of Water & Power Achieves Demand Management Goals with Unique Volumetric Rate Structure and Long-Term Planning|
The Los Angeles Department of Water and Power (DWP) serves the City of Los Angeles and some small adjacent areas. The City’s increasing block rate was developed from a Citizens Blue Ribbon Committee in 1993 and has been widely seen as a success that helped flatten water demand in spite of a growing population and economy. DWP’s rate structure has maintained required utility revenues, reinforced incentives to use water efficiently, and has achieved broad customer acceptance within a major metropolitan area having a diverse customer base.
|Water Quality Impacts of Extreme Weather Events: Case Studies|
A total of 46 Case Studies from the United States and Australia were collected as part of WRF project #4324
. These case studies are available here in one document, bookmarked by Case Study number. (PDF 5mb)
|Case Study Series: Water Resource Strategies and Information Needs in Response to Extreme Weather/Climate Events|Project 4416
is a collaborative project with WaterRF, WERF, NOAA, EPA, Concurrent Technologies Corporation, and Noblis that examines how water utilities, resource managers, and county and regional planners make decisions before and during extreme weather events, and how they have adapted, or intend to adapt, their planning efforts to better prepare. The project held workshops in six communities that have experienced extreme events and produced case studies. Five of these case studies, from the following locations, highlight lessons learned on building resilience to extreme events, including useful tools and data sources. The case studies are packaged together below into an Extreme Weather Case Studies Compendium.
- California: Russian River Watershed
- Georgia: Upper Apalachicola-Chattahoochee-Flint River Basin
- Kansas/Missouri: Lower Missouri River Basin
- Virginia: Tidewater Area
- Washington DC: National Capital Area
|Implementing Renewable Energy at Water Utilities: Case Studies|
Many utilities have found means for including renewable energy options at their facility, either through direct purchasing and operating of equipment, leasing space on-site to third-party renewable energy companies, through purchase power agreements, or purchasing offsets from third parties off-site to account for power use in high-energy applications such as desalination. To provide context for WaterRF subscribers on this issue, the efforts of a few municipalities with successful renewable energy projects are highlighted as case studies. These case studies have been selected for the type of renewable energy technology, project scale, and location.
|Quantifying the Benefits of Water Quality Catchment Management Initiatives: Case Studies|
Under project #4393, UKWIR developed a benefit assessment framework to assist in evaluating the benefits of catchment (watershed) management schemes. The purpose of this document is to test the framework using a series of five catchment management case studies.
|An Operational Definition of Biostability for Drinking Water: Case Studies|
These case studies focus on the biostability monitoring practices and issues at 26 drinking water facilities. Information collected from each facility includes: 1) type of source water, 2) treatment processes, 3) disinfectants and stabilizers added in finished water, 4) monitoring and control programs for the biostability in the distribution system, 5) distribution system materials, disinfectants, stabilizers, residence time, pipe age, and maintenance practices, and 6) biostability issues in the distribution system. The authors analyze the historical biostability issues and associate the potential causes with the manifestation of the instability.
|Case Study: Ann Arbor Water Treatment Services, Michigan|
This case study by Ann Arbor Water Treatment Services illustrates energy savings strategies in the areas of water treatment, water distribution, and plant improvements. The case study is excerpted from project #4223, Energy Efficiency in the North American Water Supply: A Compendium of Best Practices and Case Studies.
|Case Study: Tarrant Regional Water District|
Decision Support System for Sustainable Energy Management (project #4090) resulted in the development of a decision support system (DSS), Excel-based tool to help water utilities explore the results of implementing various energy management options. This pilot study with Tarrant Regional Water District, adapted from project #4090, illustrates one utility’s use of the tool.
|Best Management Practices: Case Studies from the North American Drinking Water Community|
The Water Research Foundation documented innovative practices in asset management by five North American drinking water utilities for the Global Water Research Coalition’s (GWRC) international “Compendium of Asset Management Case Studies.” The Foundation is a founding member of the GWRC, a global partnership of water research organizations. The full Compendium will include drinking water and wastewater case studies from four or five countries and will be available in 2009. Included here are the five North American Case Studies related to Drinking Water that serve as Best Management Practices in the area of utility Asset Management. The Case Studies represent utilities that are geographically diverse, vary in size from small to large, have different types of governance structures, and are all quite active in some or all parts of the Asset Management continuum.
|Case Study: Wyoming, Michigan, Uses KANEW for Asset Management|
The city of Wyoming, Michigan, used a Foundation asset management program to prioritize its plans for renewing and replacing pipes in its distribution system.
|Philadelphia Tracks Customer Perceptions to Confirm Its Taste-and-Odor Practices|
Philadelphia Water participated in Foundation studies on consumer perceptions of tap water and on public perceptions of chlorinous flavor to ensure that it understood its customers' attitudes toward the utility's chloramine residual and to fine tune its practices.
|Energy and Water Quality Management System (EWQMS) Saves Electricity Dollars|
The East Bay Municipal Utility District (EBMUD) participated in Foundation research projects on EWQMS, then developed its own energy optimization strategy and software to reduce electricity use, and costs.
|Using Chlorine Dioxide to Control Bromate Formation in El Paso, Texas|
High bromide levels in Rio Grande source water led El Paso Water Utilities to apply chlorine dioxide prior to ozonation to control the formation of bromate, a regulated contaminant.
|The Impacts of Blended Source Waters on the Distribution System|
This case study outlines how Tampa Bay Water addressed the challenge of blending source waters in pilot-test water treatment strategies for saline, treated surface, and ground water to understand the properties of numerous, seasonally adjusted blends and the interactions of those blends with member governments' varied distribution systems.
|Aquifer Storage and Recovery|
From the Foundation series, "Research Applications: Research in Use". In 2001, about 40 United States utilities were applying ASR technology. This case study offered examples describing some of the unique empirical knowledge gained from their experiences and how Foundation research on aquifer storage and recovery is helping water utilities ensure adequate supplies for their customers
|How Particle Counting Can Improve Water Quality|
From the Foundation series, "Research Applications: Research in Use", this study discusses how Foundation research has helped water utilities use particle count data to optimize treatment plant processes for particle and pathogen removal.
|Research Leads to Large-scale Microfiltration Plants|
From the Foundation series, "Research Applications: Research in Use", this study explores the advantages of low-pressure membrane treatment processes and how water utilities have applied Foundation research findings on membranes to remove microbial contaminants
|How Chloramines Improve Water Quality|
From the Foundation series, "Research Applications: Research in Use", this study discusses how four water utilities applied Foundation chloramine research findings to solve water quality problems.