[Central Pennsylvania Water Quality Association - Official Site The Central Pennsylvania Water Quality Association (CPWQA) is the professional member-driven association for more than 5,000 Pennsylvania water treatment operators, facilities, professional and students. CPWQA is a non-profit organization dedicated to the advancement of the knowledge of design, construction, operation and management of municipal and industrial wastewater treatment facilities. The CPWQA is affiliated with the state organization - the Pennsylvania Water Environment Association (PWEA)]