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Cross Connection Control Program

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State and federal regulations require the City to operate a Cross Connection Control Program to reduce the chances of an accidental contamination of the public water supply caused by the backflow of water from a customer’s plumbing system into the public water mains.

Cross connections are found in all plumbing systems. It is important that each cross connection be identified and evaluated as to the type of backflow protection required to protect the drinking water supply. Some plumbing fixtures have built-in backflow protection in the form of a physical air gap. However, most cross connections will need to be controlled through the installation of an approved mechanical backflow prevention device or assembly.

Major Components of the Cross Connection Control Program 

            This survey is to identify and eliminate possible sources of cross 
            connections to help ensure the safety of the public water supply.  
            The information collected through the surveys helps to identify where 
            backflow prevention devices may be needed as well as providing 
            information on existing devices that may not have been previously 
            submitted to the City. 

            Residential and Commercial surveys can be completed on-line or mailed
            to the following address:

                                    City of Rock Island
                                    Cross Connection Control Program
                                    1309 Mill Street
                                    Rock Island, IL  61201

            The deadline to complete the survey is June 15, 2016.
  • Each year a Backflow Test Report must be submitted for all backflow prevention devices.

            Backflow may affect the quality of the drinking water at your facility and 
            has the potential to create health hazards if contaminated water enters 
            your water supply plumbing system and is used for drinking, cooking, 
            or bathing.

            It is the water customer's responsibility to ensure that unprotected cross 
            connections are not created and that any required backflow prevention 
            devices are tested in accordance with state requirements and 
            maintained in operable condition.

            You are responsible for hiring a licensed backflow tester to perform the 
            annual test and certification of the backflow assembly(s).  

            The City of Rock Island has partnered with BSI Online to assist in 
            administering the Cross Connection Control Program.  BSI Online 
            will issue a Customer Confirmation Number (CCN) to use when reports 
            have been submitted at www.bsionlinetracking.com.  You may also use 
            this e-mail to verify when your backflow test has been filed, locate a list 
            of testers in the area, or to simply learn more about backflow.

            Please contact BSI Online via e-mail at  or 
            phone at 1-800-414-4990 if you have any questions.

For a better understanding of the Cross Connection Control Program please view the Frequently Asked Questions.        

Public Works Building
Public Works Department
1309 Mill Street
Rock Island, IL 61201
Ph: (309) 732-2200
Fx: (309) 732-2380

8:00 am - 5:00 pm
Monday - Friday