You are here: Home Licensing Class D Questionnaire for Water Operators Class D Water Operators License Questionnaire License Number License Number Please enter the license number. https://www.tceq.texas.gov/licensing/ClassDQuestionnaireWater/waterq/licenseno https://www.tceq.texas.gov/@@site-logo/tceqlogo-3colors.gif License Number Please enter the license number. License Number Please enter the license number.