In 2000 and 2006 the City of Houston Municipal water use was 347,947 and 346,393 acre-feet respectively. Harris County excluding Houston uses approximately 250,000 acre-feet per year for municipal purposes. Dow Chemical Company and Reliant Energy Company hold fresh water permits in the region in the amounts of 321,856 and 166, 238 acre-feet per year respectively. Four industrial companies, including Dow and Reliant, which hold manufacturing water rights, are dedicated almost 670,000 acre-feet per year of the region’s water supply. This is in addition to another 580,000 acre-feet sold to other manufacturing companies in 2006. The total municipal water demand for of Region H was 865,966 acre-feet in 2006 (Region H Water Planning Group, 2010). These three users constitute three of the largest municipal and industrial users in the region. The region consists of all or part of 15 counties: Austin, Brazoria, Chambers, Fort Bend, Galveston, Harris, Leon, Liberty, Madison, Montgomery, Polk, San Jacinto, Trinity, Walker and Waller.