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Arizona Administrative Code Section R18-04-215 and Global Water Resources' Codes of Practice require public water systems to protect consumers from contamination caused by backflow through unprotected cross-connections by requiring the installation and periodic testing of backflow prevention assemblies. Arizona Administrative Code R14-2-405.B.6 requires that any customer’s lines be installed so as to prevent cross-connection or backflow contamination.

Accordingly, Global Water Resources requires backflow prevention assemblies to be installed and/or retrofitted at the service connection where there exists a possibility of cross-connection contamination caused by backflow.

In drinking water pipes, whether in a commercial building or a family residence, water pressure can suddenly drop for a number of reasons. Drops in water pressure can occur during high water use in the home (running all water appliances, showering, watering) or high water use in the distribution system (fire fighting, water main break). When these drops of water pressure occur, contaminated water can be siphoned back into your plumbing system through an unprotected cross connection in your home or in the distribution system.

The type of backflow prevention assembly required is determined based on the hazards present at a particular service connection.  There are four categories.


Category 1: Non-residential, commercial and industrial property service lines.
Category 2: Non-exempt single-family and multi-family residences with common or dual plumbing.
Category 3: Dedicated irrigation service lines.
Category 4: Fire service lines.

You should review a copy of the Backflow and Cross Connection Tariff for your utility, located here.  

Click HERE for a list of Registered Backflow Testers.

Customer Responsibility for Backflow Prevention

Global Water Resources will specify, as required by its tariffs and the Arizona Administrative Code, if a backflow prevention assembly is required and the type of assembly needed for a particular service connection.  Where a backflow prevention assembly is required, it must be located on the customer’s side of the service connection, downstream of the meter. The approved backflow prevention assembly is installed, owned, tested and maintained by the customer. In accordance with the Arizona Administrative Code Section R14-2-407, the customer is responsible for maintaining customer-owned equipment.

Title 14, Chapter 2 regarding Fixed Utilities and customer responsibilities is located here.  Title 18, Chapter 4 regarding Safe Drinking Water, including provisions regarding backflow and cross-connection is located here. Clicking these links will take you to a third party website. Global Water is not responsible for the content or availability of these third-party websites.

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Required Testing

Are you a registered backflow tester, if not, click here.

  • All new service connections (commercial or residential) that require a backflow prevention assembly must install the backflow assembly and the certified backflow inspector must submit a passing test result within 24 hours of meter installation.

  • All installed backflow prevention assemblies must be tested annually by a certified backflow inspector.  It is the customer's responsibility to arrange for annual testing and submission of results by a certified backflow inspector.

  • Passing test results can be submitted electronically here.  Test reports must be submitted directly by the certified inspector.

  • A "failed" test result must be reported within 24 hours of testing.  Please email to report a failed test.​  Failed backflow assemblies must be repaired or replaced and re-tested until the test is passed. Global Water may require repairs or replacement be completed immediately in order to prevent cross-contamination of the water system.

  • ​Non-compliance with the requirements of the Arizona Administrative Code or the approved Backflow and Cross-Connection Tariff may result in disconnection of water service to prevent cross-contamination of the water system.​

Backflow Test Report

 Backflow Prevention Tester Policy

Backflow Prevention Assembly Annual Compliance

Each backflow prevention assembly ("BPA") tester is required to complete the certified required course to become a Certified Backflow Prevention Assembly Tester. The Tester’s certificate must be current and submitted with the BPA test report. Global Water is not permitted to recognize test reports as being valid unless a copy of the BPA Tester's certificate is on file. To avoid delays in the verification of your compliance with Global Water's Backflow/Cross-Connection Control Program, please:


  • Use a Certified Backflow Prevention Assembly Tester

  • Make sure the Tester's certificate is current and submitted with the BPA Test Report

  • Click HERE for a list of Registered Backflow Testers.

Calibration of Test Equipment

The test equipment used for testing BPA's shall be calibrated and certified annually. Certified calibration reports shall be submitted to the Global Water Backflow/Cross-Connection Control Program at Failure to submit required certified calibration reports could result in 'non-compliance' of the program for the BPA customer. BPA testers will be held accountable to Global Water’s Tester Policy.


Submission of Backflow Prevention Assembly Testing Reports


The timely submission of accurate testing reports is an essential element in the smooth operation of Global Water's Backflow/Cross-Connection Control Program. In order to aid in this process, Global Water requires all BPA test reports be submitted electronically. Submit testing reports and the Tester's certification here.   


Backflow Test Report Form


In addition to submitting the test report for each individual BPA, the following information will be required in the submission form:

  1. Owner information

  2. Water Company

  3. Backflow Device Serial Number

  4. Potable Water Meter Serial Number

  5. Backflow Tester Company Name

  6. Backflow Tester Contact Number

  7. Tester's email address​


When a test report is submitted electronically, a confirmation screen will appear with a unique identification number indicating the form has been submitted. The tester will also receive an email confirmation. This confirmation process is important and it is recommended that testers keep this information for future record in the event proof of submission is required.



Inaccurate or incomplete reports will not be accepted. Reports lacking information or with inaccurate information will be sent back to the tester for correction. Delays in the administration of the program could result in a notice to the customer for not complying with the Global Water Backflow and Cross-Connection Program which could result in a disruption of water service.

If you have any questions regarding this policy, please contact us at

Thank you for your cooperation in adhering to the Global Water Backflow Prevention Assembly Tester Policy.

Cross Connection FAQ

Cross Connection FAQ
  • What is a rate case?
    Over the years a system has been developed to consider rate cases. The utility presents its case, and customers and regulators can challenge the utility’s requests. In Arizona, an independent agency represents customers’ interests, the Residential Utility Consumer Office ( RUCO has trained lawyers and accountants who represent customers in rate cases. Early in the process, a schedule of public hearings is created that allows the public to follow and participate in the process. The utility is required to support its request through testimony and exhibits that must meet rigorously applied standards of evidence. During the hearing process, the utility is subject to cross examination and evidence presented in the proceeding can be challenged on a number of grounds. The rate case process involves the following stakeholders: the utility; members of the public, including local government, public interest groups and other organizations and individuals; RUCO gets involved in certain cases, and the Arizona Corporation Commission Staff.
  • Why are the Global Water Utilities filing a rate case?
    The utilities Global Water has purchased in Pima County historically have not been adequately invested in to properly maintain the utility infrastructure. Global Water has is using our utility expertise and capital resources to restore these utilities. Global Water will continue to invest in updating these utility now and over time. Performing a rate case will allow Global Water to continue to provide safe, reliable drinking water.
  • Which Global Water Utilities are included in the rate case?
    The rate case will include the following utility companies, serving the following areas: Pima County Utilities Sahuarita and Green Valley, AZ Global Water- Las Quintas Serenas Water Company, Inc Three Points Global Water- Francesca Water Company, Inc. Global Water- Mirabell Water Company, Inc. Marana, AZ Global Water- Lyn Lee Water Company, Inc. Global Water- Tortolita Water Company, Inc Vail, AZ Global Water- Rincon Water Company, Inc
  • When will the rate changes take effect?
    We filed the Rate Case application on June 27, 2023. After the filing an extensive review will occur by the ACC, which is expected to take approximately 9 months. No rate changes or dates have been determined yet. As the process continues, Global water will make sure you are informed.
  • How long has it been since the Global Water Utilities filed a rate case?
    Global Water Utilities has never filed a rate case for any of the utilities in this Rate Case. The last time rate case were filed is listed below: Global Water- Francesca Water Company, Inc. - 2015 Global Water- Las Quintas Serenas Water Company, Inc- 2012 Global Water- Lyn Lee Water Company, Inc. - 1993 Global Water- Mirabell Water Company, Inc. - 2010 Global Water- Rincon Water Company, Inc - 1997 Global Water- Tortolita Water Company, Inc - 2004
  • What improvements have the Global Water Utilities made to Customer Service?
    Over the past two years, Global Water transition each of our Pima County utilities onto our standard suite of customer service applications. All customers now have access to a professionally staff call service center to assist with payments and service-related questions. Customers also have access to an industry leading customer portal. Customers can easily access their billing information, pay their bill, and receive conservation assistance at any time by access their account online. Customer are also eligible to receive assistance through our customer assistance program. This program provides payment assistance to customers experiencing low income, a work furlough, or a medical hardship, as well as assistance to disabled veterans and deployed service members.
  • What is the Arizona Corporation Commission's role in setting utility rates?
    The Arizona Corporation Commission (ACC) regulates investor‐owned water companies throughout the state. The ACC monitors service quality, sets rates and inspects utility facilities to ensure they are in proper working order. Utilities are entitled to recover the expenses associated with operating the utility, plus a reasonable return on infrastructure investments. This money is collected through the rates that customers pay. When a utility requests a rate adjustment from the ACC, several steps are taken. The ACC reviews the company’s financial condition and ensures the company is fulfilling its obligations to customers. The ACC Staff prepares a staff report which lays out staff’s position. A public hearing is held and presided over by an Administrative Law Judge. The judge considers the facts as presented in the testimony and prepares a Recommended Opinion and Order (ROO) which advises the Commission of Staff’s recommendations regarding the rate case. The Commission considers the ROO and may accept, modify or reject any or all of recommendations.
  • I’m installing a pool. Do you need to be notified and is there a discount for filling a pool?
    Global Water does not need to be notified – feel free to fill or refill your pool at any time. We do not, unfortunately, offer any discounts associated with the filling of a pool or other water feature.
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