The energy sector is the fastest-growing water consumer in the United States. Projections attribute to the energy sector 85% of the growth in domestic water consumption between 2005 and 2030. Much of the energy sector's growing water demand is concentrated in water-constrained regions. Whether the energy sector helps exacerbate or alleviate future water tensions is influenced by current energy policy and investment choices. These choices also may determine whether water limits or harms the nation's ability to reliably meet energy demand. Water already plays a significant role in the energy sector, and water use by the energy sector already shapes national water use. The energy sector is changing. Options for managing and meeting energy's water demand range from maintaining the current approach, with little federal action targeted at managing energy's water demand, to taking a variety of federal actions. This could be accomplished through changes to broad policies (e.g., energy demand management) or legislation specifically targeted at water use (e.g., promotion of water-efficient energy alternatives). Another option is to improve the energy sector's access to water. Access is generally a responsibility of the state, but some limited federal actions are possible. An additional option is investing in data and research to inform decision-making and expand water-efficient energy technologies. Legislation in the 111 th Congress proposed many of the above options; examples include H.R. 469 , H.R. 2454 , H.R. 3598 , H.R. 1145 , S. 1462 , S. 1733 , S. 3396 , and Subtitle IV of P.L. 111-11 ( H.R. 146 ), the Secure Water Act of 2009. During the 112 th Congress, energy's water use may arise in a variety of contexts, including during consideration of energy, agriculture, public land, and water legislation and oversight. Energy Sector's Vulnerability to Water Constraints

The more freshwater used by the energy sector, the more the sector is vulnerable to water constraints. How much water will the energy sector use in the future? Will water constrain the transition to greater energy independence? Regional Significance of Energy's Water Demand

Much of the anticipated growth in the energy sector's water demand is in water-constrained areas, potentially exacerbating competition and low flow condition for water during summer and droughts. That is, while energy's water demand is anticipated to rise across the United States, the West is likely to experience some of the more significant constraints and conflicts in meeting this demand. The following examples of regional water consumption concerns are discussed in more detail: shale gas production in Texas using hydraulic fracturing, solar electricity generation in the Southwest; and biofuel production in the High Plains. Shale gas formations occur in many areas of the United States. Historically the energy sector and the states have determined how water is used in the energy sector, but the significant role that current federal policies are playing in driving up energy's water demand is raising questions about the federal role in meeting and managing that demand. Who is responsible for the vulnerability of the nation's energy system to water availability? Congress is faced with deciding not only whether, and if so how, to alter current policies to respond to energy's water demand, but also who is the most appropriate entity to respond to energy's growing water demand. The issue of the energy sector's water use may arise during the 112 th Congress in a variety of contexts. Attempts can be made to minimize the growth in energy's freshwater use by adopting general energy policies that are less water intense and more sensitive to water constraints, or by specifically promoting activities that reduce energy's water use, such as incentives for adopting less water intense energy generation technologies. These options also represent different potential roles and costs for federal and state governments, the energy sector, and energy consumers. Current and evolving conditions also play a role: providing greater access to water for the energy sector (which is primarily up to the states) may be difficult and controversial in water-scarce, drought-prone, or environmentally sensitive areas, especially with climate change anticipated to affect the availability and reliability of water in some regions.
The energy choices before Congress represent vastly different demands on domestic freshwater because water is used in varying amounts in most aspects of the energy sector. Transitions in the energy sector, such as the pursuit of greater energy independence and security, produce changes in how much and where the energy sector uses water. The energy sector is the fastest-growing water consumer in the United States, in part because of energy policies. Whether the federal government addresses the energy sector's rising water demand, and if so how, is one of the many energy decisions that may be considered by the 112th Congress.
Much of the growth in the energy sector's water demand is concentrated in regions with already intense competition over water. Whether the energy sector exacerbates or alleviates future water tensions is influenced by near-term energy policy and investment decisions. These decisions also may determine whether water will limit or harm U.S. capability to reliably meet the nation's energy demand. Part of the policy issue for Congress is identifying the extent of the federal role in responding to the energy sector's water use. Currently, the energy industry and states have the most responsibility for managing and meeting the energy sector's water demand.
The energy sector's water consumption is projected to rise 50% from 2005 to 2030. Projections attribute to the energy sector 85% of the growth in domestic water consumption between 2005 and 2030. The drivers of the energy sector's increasing water use are rising energy demand, greater development of domestic energy, and shifts to more water-intense energy sources and technologies. The more water used by the energy sector, the more vulnerable the energy system is to water availability. Climate change alterations of historic water patterns may exacerbate this vulnerability in some regions. While the energy sector's water demand is anticipated to rise across the United States, the West is likely to experience some of the more significant constraints in meeting this demand. Examples of regional water use concerns related to energy are shale gas production using hydraulic fracturing in many regions across the nation, some solar electricity generation in the Southwest, and current biofuel feedstock production in the High Plains.
The 112th Congress may see the issue of energy's water demand in a variety of contexts, including oversight and legislation on energy, infrastructure, environment, agriculture, public lands, climate, research, and water. Approaches for addressing energy's water demand range from maintaining the current approach to taking a range of actions. One set of available actions includes those that attempt to minimize the growth in energy's freshwater use (e.g., through promotion of water-efficient energy alternatives and energy demand management), which could be accomplished through changes to broad policies or legislation targeted at water use. Many of the possible actions to decrease water use come with energy cost, generation, and reliability penalties. Another set of actions includes measures that facilitate access to water for the energy sector. While water allocations and permits generally are a state responsibility, limited federal actions to provide water to the energy sector are possible (e.g., access to surplus water at federal reservoirs). An additional set of actions encompasses investments in data and research to inform decision making and to expand water-efficient energy technology choices. These approaches represent different potential roles and expenses for government, the energy sector, and energy consumers. Legislation in the 111th Congress proposed a variety of actions, including provisions in H.R. 469, H.R. 2454, H.R. 3598, H.R. 1145, S. 1462, S. 1733, S. 3396, and the Secure Water Act of 2009, Subtitle IV of P.L. 111-11 (H.R. 146). A significant challenge to a federal response to the energy sector's water demand is that the available options are not equally needed, attractive, or feasible across the United States.