The federal and state statutes impose record keeping requirements on water suppliers and the state. The records of all the various activities mentioned in this chapter are maintained by the state and most of these records are amenable to computer storage, retrieval and reporting. The type of monitoring and frequency of analysis are two critical components of any computer system. The Michigan Department of Public Health has already established computer systems to assist state personnel in carrying out their work and provide data to other agencies and the public as a service. Noncommunity public water supplies, numbering more than 11,000 in Michigan, serve nonresidential facilities with public access, such as restaurants, schools, campgrounds and industries. Computers have many useful applications in water supply regulation and many additional uses will be found as regulations become more numerous and complex. The state regulatory personnel must inspect and evaluate the status of each water system periodically.