Texas Board of Professional Geoscientists (TBPG) is mandated by law to set and apply standards of professional performance of environmental geologists, engineering geologists, and water supply hydrogeologists through the mechanism of Professional Geoscientific (PG) licensure for the purpose of public protection – the highest priority of TBPG. To meet this goal, TBPG revised Texas’ previously existing Code of Professional Standards on September 24, 2010. Evaluations of resolved actionable PG enforcement case studies help delineate the boundary between specific failures to meet the expected special-diligence PG standard-of-care from day-to-day correctable PG service errors. Uniform compliance with the revised Code of Professional Standards is integral to Texas public safety and environmental protection; TBPG seeks the active participation of all Texas licensed Professional Geoscientists in 2011.