Glenn Hegar
Texas Comptroller of Public Accounts
Glenn Hegar
Texas Comptroller of Public Accounts
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Glenn Hegar
Texas Comptroller of Public Accounts
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Water is good for Texas

Water planning and management in Texas is necessary to prepare for future weather events that affect water resources and to ensure enough water is available for future generations of families and businesses. Continued economic prosperity and quality of life depend on the successful implementation of water management strategies designed to conserve and bolster our state’s water supply to meet growing demand.

Between 2020 and 2050,
Texas’ population
is estimated to
increase from 29 million
to 47 million people
all of whom will need
reliable and clean water
sources to lead healthy
and productive

Texas Water Planning 
and Management

Every five years the Texas Water Development Board (TWDB) releases an updated State Water Plan (SWP) designed to guide Texas water policy and assess regional water supplies and needs 50 years into the future.

Water Supply

The TWDB estimates that Texas’ existing water supply — which consists of surface water, groundwater and water reuse (i.e., wastewater) —
will decline by eighteen Percent
between 2020 and 2070.

Annual Existing Water Supply in Texas, 2020-2070

Annual Existing Water Supply in Texas, 2020 and 2070
Source 2020
Percent change
Surface water 7,232,000 7,080,000 -2.1%
Groundwater 8,912,000 6,023,000 -32.4%
Reuse 620,000 714,000 15.2%
Texas 16,764,000 13,817,000 -17.6%

Water Demand

The TWDB estimates that Texas’ total water demand will increase by 8.5 percent between 2020 and 2070. However, demand differs greatly by water use category over this period.

Projected to Increase

  • Municipal
  • Livestock
  • Manufact­uring

Projected to Remain Constant

  • Steam-Electric Power Generation

Projected to Decrease

  • Agricultural Irrigation*
  • Mining

*Due to a variety of factors such as precision agriculture tools that save water and the reduced availability of groundwater.

Water Management Strategies

Percent Share by Water Resource, 2020-2070

Source 2020 2070
Reduction in Demand* 50.9% 30.9%
Surface Water 24.2% 37%
Groundwater 17.6% 14.5%
Reuse 7.2% 15.1%
Seawater 0.2% 2.5%

Sources: Texas Water Development Board; Texas Demographic Center

Water management strategies are designed to increase water supply and/or reduce water demand to address potential shortages.

More than two-thirds (69%) of the strategies recommended in the state water plan rely on creating additional water
such as surface water or groundwater, while the remaining strategies focus on reducing the demand for water (e.g., conservation activities).

*Reduction in demand is projected to come from agricultural, municipal and other conservation efforts.

Water Project Funding

The TWDB estimates that implementing the recommended water management strategy projects (i.e., new infrastructure) will require $80 billion in capital costs over the next 50 years — and $47 billion of that is expected to come from state financial assistance programs.

The State Water Implementation Fund for Texas (SWIFT), the largest of those programs, has committed nearly $9.2 billion in financial assistance for 58 recommended projects since the program began in 2015.

For more information

Check out our June/July edition of Fiscal Notes for a detailed look at the 2022 State Water Plan and some of the innovative water management strategies in Texas.

This is one in a series of reports the Comptroller has prepared on water in Texas.

See more information on Water Issues and the Texas economy.

Glenn Hegar

Texas Comptroller of Public Accounts


If you have any questions or concerns regarding the material on this page, please contact the Comptroller’s Data Analysis and Transparency Division.