Reducing Environmental Impact
Reducing GHG Emissions
The vast majority of energy utilized by water companies is consumed to pump water. At American Water, our research indicates that approximately 97 percent of our electricity consumption and 90 percent of our GHG emissions are the products of the water delivery process, which includes pumping water from its source (ground or surface water systems) to treatment and storage facilities and on to customers.
Research has shown that the average "wire-to-water" efficiency of existing "in-field" water utility pumps is about 55 percent. New installations are designed to achieve efficiency ratings of between 76 percent and 82 percent. American Water sees this as a major opportunity to decrease its carbon footprint. By replacing or refurbishing older pumps, our studies have shown that pump efficiency can improve by as much as 20 percent.
In 2010, we implemented a program to conduct wire-to-water testing at American Water locations targeted due to high energy use. The majority of this testing was completed in 2009 and 2010. In 2011, we will complete the efficiency data analysis and related capital planning and begin our capital investment program that will lead American Water to a path of greater pump efficiency. Upon completion of our planning and data gathering in 2011, we will begin to implement our pump replacement and refurbishment plan in late 2011.
American Water uses a combination of natural gas, gasoline, and diesel fuel in our operations. Natural gas is primarily used to heat our office buildings and treatment facilities. Gasoline and diesel are used in our fleet vehicles. Diesel is also used in our emergency generators.
In 2010, approximately 92 percent of our GHG emissions were from purchased electricity.
Total Direct and Indirect Greenhouse Gas Emissions
To view a full-size version of the graph, or to download a pdf of the graph, click on the graph thumbnail image.
Increasing Lighting Efficiency
Increasing Our Production of Green Power
American Water is due to complete two capital projects in 2011 that will expand our solar capacity by approximately 240 kW. In addition, American Water has plans to expand our solar capacity in 2012 and 2013 by almost 2 megawatts (MW).
To produce additional green power, we commissioned solar site surveys at 13 American Water facilities across New Jersey. The surveys found numerous promising sites at which we will pursue the installation of solar photovoltaic systems in order to meet our goal. We are also exploring the generation of bio-fuels and bio-energy at our wastewater treatment plants to convert the incoming organic waste into less carbon-intensive green energy.
Increasing Our Purchase of Green Energy and Carbon Credits
The following metrics are based on renewable energy used by American Water's regulated businesses only. The solar energy usage is based on the electricity output of American Water's solar generation. One hundred percent of the electricity produced by our solar generation is consumed by company facilities. The wind energy is purchased from a third-party vendor and is consumed at our water treatment plant in Yardley, Pennsylvania.
Renewable Electric Generation Consumed
A number of treatment chemicals also utilize recycled material in their production. These would include the ferrous and ferric salts (ferric sulfate and ferric chloride) which are manufactured using ferrous scrap. The remaining chemicals are produced using virgin materials. For 2010, treatment chemicals produced from recycled material and used by our regulated business, accounted for 11 percent of the treatment chemical purchases across American Water.