* DEP Home * About DEP * Programs * Contact * Site Map * Search *



Unless indicated, documents on this Web site are Adobe Acrobat files, and require the free reader software.


Cross-Connection Control   Drinking Water     Central District Highlights


To CD Home > Drinking Water > Field Compliance >

Cross-Connection Control



What is a Cross-Connection?

  • A connection (direct or indirect) between potable (i.e. drinking) water and non-potable water or other substances.

    • For example, a drinking water main interconnected with a reclaimed water line,

    • or a garden hose submerged in a container of dirty water.

Hose in Bucket: Cross-Connection


  • These connections allow for potentially harmful contamination of public water systems.  Contamination is possible when one of the following occur:

    • Backpressure Backflow - Backflow caused by a downstream pressure that is greater than the upstream or supply pressure in a public water system.  Reductions in potable water supply pressure occur whenever the amount of water being used exceeds the amount of water being supplied, such as during water line flushing, fire fighting, or breaks in water mains.

    • Backsiphonage Backflow - Backflow caused by a negative pressure (i.e., a vacuum or partial vacuum) in a public water system. The effect is similar to drinking water through a straw. Backsiphonage can occur when there is a stoppage of water supply due to nearby fire fighting, a break in a water main, etc.



Why Should I be Concerned?

  • There can be many hazards present in a water distribution system.  These hazards are categorized as either high or low.

    • High Hazards – any substance that, if introduced to the public water system could cause illness, death, or spread diseases.  Examples include industrial fluids or waste.

    • Low Hazards – any substance that, if introduced to the public water system  that would not be a health hazard but would constitute a nuisance or be aesthetically objectionable.   Examples include pollutants which would affect the color or odor of the water.



How Can I Prevent Cross-Connections?

  • Through the inspection of a water distribution system and regular testing of backflow prevention assemblies.

  • Accomplished by establishing and implementing a Department-approved Cross-Connection Control Program (CCCP). 

    • These elements [word format 44 kb] must be included in every CCCP. 

  • Based on the level of risk that a service connection poses to the water system, a backflow prevention device or assembly may be required. 


Cross-Connection Control Program (CCCP) Templates


  For Additional Assistance:

  • Please contact Manuel Cardona by e-mail using Manuel.Cardona@dep.state.fl.us or by phone at 407-897-4134.


    Drinking Water Contacts:   Compliance Assurance and Permitting Contacts

    Central District

    Drinking Water Section

    3319 Maguire Blvd., Suite 232

    Orlando, Florida 32803-3767


    All Purpose Fax: 850-412-0467

    Dedicated MOR Fax: 850-412-0740

    Incident Reporting and Chemical/Bacteriological Reporting Fax: 850-412-0482


    If you have technical problems with the functioning of this web site,

    please e-mail our webmaster.

Drinking Water Site Map

CD Drinking Water Home

Electronic Documents- OCULUS

External Links

Field Compliance


Hurricane Preparedness

In House Compliance


Reporting Requirements

Training Opportunities

What is a Public Water System?

What's New?


Tell us what you think


Download Viewers/Readers





Last updated: May 18, 2012

  Contact DEP's Central District at: DEP_CD@dep.state.fl.us 
DEP Home | About DEP  | Contact Us | Search |  Site Map