How are the water use and groundwater pumpage estimated?
The TWDB estimates water use at the city level for cities which have population of 500 or greater and for county seats. Gross water use is collected for municipal water suppliers, subtract sales to other water suppliers, and attribute some portion of the utility’s net use to particular cities. County estimates are the sum of net water use from municipal utilities and rural users in each county. Water use for manufacturing is the summation of water use for manufacturing firms reporting to the TWDB. Water use for power is a combination of reports and calculations of consumed water based on individual water supply power plant configurations. Mining water use is a combination of reported water use by firm and additional estimates based on prior years’ research. Irrigation is provided annually by the TWDB Conservation Division and is based on crops, acreage, climatic conditions, observations by local agricultural representatives, and data provided by irrigation and groundwater districts. Li
