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Denver annual backflow testing

Denver Water requires certified testers to test assemblies on installation and annually thereafter, then report the results to the cross-connection control office.

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City: Denver Utility: Denver Water Cross-Connection Control and Backflow Prevention Program Cadence: Upon installation and annually thereafter Last verified: 2026-06-29
Local answer

What to check for Denver

Denver Water requires certified testers to test assemblies on installation and annually thereafter, then report the results to the cross-connection control office.

  • Due basis: Denver Water sends a testing reminder 30 days before the annual test is due, expects certified testers to report results to the Cross-Connection Control office, and can assess a $250 penalty after repeated ignored notices.
  • Who is affected: Commercial, industrial, domestic, irrigation, fire-line, and auxiliary-water-supply customers when Denver Water requires an approved assembly.
  • Program phone: 303-893-2444
Evidence-backed next step

Use the governing utility workflow

City search demand maps directly to Denver Water's governing program.

Open annual testing workflow
Local signals

Signals that matter before you act

  • The utility sends reminder notices 30 days before the annual due date.
  • Test reports are sent to the cross-connection control office.
  • A penalty path exists after repeated ignored notices.
Workflow

Denver workflow order

  1. Watch for Denver Water's annual reminder.
  2. Use a certified tester to complete the test.
  3. Submit the test report to the cross-connection control office before the service moves toward suspension.