Here are some links to various rules, regulations, and laws dealing with rainwater harvesting, graywater recovery, and water conservation for the State of Texas
Texas Administrative Code:
Treatment and Disposal of Greywater
Texas Water Code
Texas Water Law : Brief explanations about the law related to the different classes of water in Texas.
The TCEQ has adopted the changes to the Chapter 210 (Use of Reclaimed Water) of the TAC in accordance with HB 2661 pertaining to graywater. These changes became official January 6, 2005.
TCEQ approved amendments to Chapter 285 (On-site Sewage Facilities) of the TAC in accordance with HB 2661 pertaining to graywater.
General Provisions for On-Site Sewage Facilities
Sustainable Building Sourcebook
Graywater in Austin
Effective September 1, 2003; Section 202, Property Code, is amended by adding that a property owners’ association may not include or enforce a provision in a dedicatory instrument that prohibits or restricts a property owner from installing rain barrels or a rainwater harvesting system.
Effective September 1, 2003; Section 26.0311, Water Code, is amended to read “graywater” means wastewater from clothes washing machines, showers, bathtubs, handwashing lavatories, and sinks that are not used for disposal of hazardous or toxic ingredients.
Effective January 6, 2005; Chapter 210 (Use of Reclaimed Water) and Chapter 285 (On-site Sewage Facilities) are amended to incorporated the proposed changes introduced by HB 2661.