Yes, typically a license is required to install an irrigation system in San Antonio. It is important to ensure that the contractor you hire for installation has the proper licenses and certification for this type of work. You do definitely need a licensed irrigator to install an irrigation system in the state of Texas. The process of obtaining a license can vary from city to city, but it usually involves attending a training program, passing a written examination, and paying a fee. Additionally, irrigators must renew their licenses and periodically take Continuing Education Courses in order to stay up-to-date on best practices and industry regulations. Irrigation is regulated by the Texas Comission on Environmental Quality.