The public water distribution system is protected by the control of actual or potential cross-connections through two basic programs:
- By promoting the elimination of existing or future cross-connections through inspection and regulation of plumbing and water piping within a customer´s premises, Public Water System or between them.
- Through proper installation and maintenance of backflow preventers on services to premises where actual or potential cross-connections exist to prevent backflow or back siphonage of contaminants or pollutants from the customer´s premises into the Public Water System.