Providing drinking water and wastewater services to citizens across the nation requires a lot of energy. The ENERGY STAR program estimates that about $4 billion is spent annually for energy costs to run drinking water and wastewater utilities. US EPA efforts on water and energy include our broad outreach to promote water efficiency through the WaterSense program, as well as a suite of activities and tools that focus on energy use at utilities. In EPA's work with the water utility industry, the Agency encourages them to identify approaches to integrate energy efficient practices into their daily management and long-term planning.
The following are links that highlight the connection between water and energy:
Memorandum from EPA's Assistant Administrator for Water to the Regional Administrators
EPA's one-stop page for information on infrastructure and energy
For information on the benefits of water efficiency including energy savings, see the WaterSense program at http://www.epa.gov/watersense/water/benefits.htm
A step-by-step workbook for utilities entitled “Ensuring a Sustainable Future: An Energy Management Guidebook for Wastewater and Water Utilities” and workshops on the workbook. More information will be posted on http://www.epa.gov/waterinfrastructure/bettermanagement_energy.html, http://www.peercenter.net, and http://www.energystar.gov
The ENERGY STAR program recently added drinking water and wastewater treatment facilities to its Portfolio Manager – an interactive energy management tool that can be used to track and assess energy and water consumption.
Combined heat and power is a reliable, cost-effective option for wastewater treatment facilities that have, or are planning to install, anaerobic digesters. Biogas flow from these digesters can be used as “free” fuel to generate reliable electricity and power. For a guide that highlights the opportunities and benefits see http://www.epa.gov/chp/markets/wastewater.html
For fact sheets that describe various alternative energy sources that utilities may want to consider see http://www.epa.gov/owm/mtb/mtbfact.htm
Source: Water Headlines for March 3, 2008 • US Environmental Protection Agency