A national client obtained the services of DPRA to identify all water supply sources and sewage disposal systems at their facilities in Texas, Louisiana, Arkansas, Oklahoma, New Mexico, and Arizona and to determine their existing operating status and compliance. The information collected has been used to evaluate each facility’s compliance status relative to the Safe Drinking Water Act and to assist in the client in decision-making for issues relative to water supply and on-site sewage disposal. The client identified nearly 1,000 facilities that have, or were suspected to have, on-site water well and/or wastewater treatment systems. DPRA provided confirmation of the presence of these systems and an analysis of their condition recommendations for water quality sampling and upgrade or repairs required to bring them into compliance with federal, state and local regulations. The approach implemented by DPRA included on-site inspections, personnel interviews, records collection and review, and regulatory analysis.