Arizona official tester lists
11 utility routes with official tester-list support.
Official tester list hub
Official backflow tester lists by utility.
This hub collects utility routes where the governing authority publishes an approved, registered, or certified tester list. It is intentionally separate from non-official provider directories.
48 official tester routes
5 states represented
Directory pages stay separate
By state
Choose the state, then open the exact utility list
Tester approval is local. Start with the state group, then confirm the actual list on the governing utility page.
California official tester lists
11 utility routes with official tester-list support.
Colorado official tester lists
6 utility routes with official tester-list support.
Florida official tester lists
8 utility routes with official tester-list support.
Texas official tester lists
12 utility routes with official tester-list support.
Live official tester list pages
City of Avondale Backflow and Cross-Connection Control
Open the Avondale approved tester list
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City of Chandler Water Quality Backflow Program
Open the Chandler approved testing companies list
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City of Glendale Cross Connection Control and Backflow
Open the Glendale certified tester resource list
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City of Phoenix Backflow Prevention Program
Open the Phoenix tester list
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City of Prescott Backflow Prevention Program
Open Prescott's approved backflow tester list
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City of Tempe Backflow Prevention Program
Open the Tempe registered testing companies list
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Marana Water Backflow Program
Open the Marana approved backflow tester list
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Mesa Water Resources Backflow Prevention
Open the Mesa general tester list
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Scottsdale Water Backflow Prevention / Cross-Connection Control
Open Scottsdale commercial services backflow resources
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Town of Queen Creek Backflow Program
Open Queen Creek contractor information for approved tester routing
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Tucson Water Backflow Prevention
Open the Tucson Water tester list
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City of Anaheim Cross Connection Control
Open Anaheim's official approved tester page
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City of Modesto Cross-Connection and Backflow Control Program
Open the Modesto certified tester list from the official program page
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City of Patterson Backflow Prevention Device Annual Test Program
Open Patterson's official approved tester page
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City of Sacramento Department of Utilities Cross-Connection Control
Open the Sacramento approved backflow tester list
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City of San Diego Public Utilities Backflow Program
Open the San Diego approved tester list
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East Bay Municipal Utility District Backflow Prevention
Open the EBMUD approved tester list
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Irvine Ranch Water District Backflow Prevention
Open the IRWD backflow tester list
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Riverside Public Utilities Backflow Prevention
Open the Riverside approved backflow tester list
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Sacramento Suburban Water District Cross-Connection Control Program
Open SSWD cross-connection FAQs for the approved tester list
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San Francisco Public Utilities Commission Backflow Prevention Program
Open the SF.gov certified tester list for San Francisco backflow assemblies
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Santa Rosa Backflow Prevention Program
Open Santa Rosa's certified tester list
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Castle Rock Water Cross-Connection and Backflow Program
Open the Castle Rock certified backflow tester list
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City of Arvada Backflow and Cross-Connection Control Program
Open the Arvada certified backflow testing companies PDF
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City of Aspen Cross Connection Control AKA Backflow Prevention Program
Open Aspen's certified tester list
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City of Durango Backflow Prevention
Open Durango's certified tester list
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City of Greeley Cross-Connection Control Program
Open the Greeley local certified backflow testers list
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Fort Collins Utilities Backflow Prevention and Cross-Connection Control
Open the Fort Collins local certified backflow tester list
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City of Tallahassee Utilities Cross-Connection Control
Open the Tallahassee utility documents page for the tester list
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City of West Palm Beach Cross-Connection Control and Backflow Program
Open the West Palm Beach approved plumbing contractors list
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Hillsborough County Water Resources Backflow and Cross Connection Service Testing
Open Hillsborough County's certified tester page
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JEA Backflow Program
Open JEA's qualified backflow tester list
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Manatee County Utilities Cross Connection Control Program
Open the Manatee County program page for the county potable testers list
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Orange County Utilities Cross Connection Control
Open the Orange County Utilities cross-connection page for tester search instructions
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Sarasota County Public Utilities Cross-Connection Control Program
Open the Sarasota County approved contractor list
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Seminole County Cross Connection Control Program
Open Seminole County's certified tester list
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Austin Water Cross-Connection Control
Use Austin Water resources and WEIRS-linked tester information
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City of College Station Backflow Prevention
Open the College Station registered tester list
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City of Fort Worth Water Backflow Program
Open Fort Worth BPAT registration details
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City of Frisco Backflow Program
Use BSI to obtain the list of registered Frisco testers
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City of Garland Water Supply Protection
Open the Garland backflow tester list
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City of Leander Cross-Connection Control
Use the BSI website for Leander licensed registered testing agencies
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City of Lewisville Backflow Testing
Open the Lewisville registered tester list
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City of Mesquite Backflow Prevention
Open the Mesquite backflow tester list
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City of Round Rock Backflow Prevention
Open the Round Rock registered tester list
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Grand Prairie Water Utilities
Open the Grand Prairie program page
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San Antonio Water System Backflow Prevention
Find a registered testing company in the SAWS BSI portal
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Talty Special Utility District Backflow Testing
Open the Talty SUD registered tester list
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Approval is not universal
A tester can be valid for one utility list and not shown for another. Open the specific utility route before treating a provider as approved for a property.
Approved testers vs find a tester
Why official tester lists and commercial directories must stay separate, and what each page type is allowed to claim.
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County-certified vs utility-approved testers
Why a county certification list, a city-approved list, and a non-endorsed handout are not the same thing even when they all help users find testers.
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How we verify local backflow rules
What counts as an official source, how local utility pages override generic assumptions, and how stale pages are re-verified.
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