Denver backflow prevention requirements
Start with the utility page to confirm who is affected, accepted submission methods, phone contact, and source evidence.
City backflow route
Denver backflow testing routes through Denver Water Cross-Connection Control and Backflow Prevention Program.
City search demand maps directly to Denver Water's governing program. This page keeps the city search term visible while routing the actual compliance work to the governing utility record.
City: Denver
Utility: Denver Water Cross-Connection Control and Backflow Prevention Program
Cadence: Upon installation and annually thereafter
Last verified: 2026-06-29
Next action
Pick the Denver backflow path that matches the problem
The city term helps discovery. The governing utility still decides the rule, submission method, tester route, and follow-up order.
Denver annual backflow testing
Upon installation and annually thereafter 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.
Denver failed backflow test
Use the failed-test page when the assembly has already failed and the next step is repair, retest, and report submission.
Denver irrigation backflow testing
Use this path when the question is tied to sprinkler systems, reclaimed water, outdoor service, or irrigation assemblies.
Denver fire-line backflow testing
Use this path when the assembly serves fire protection equipment or a managed commercial site.
Why Denver maps to Denver Water Cross-Connection Control and Backflow Prevention Program
City search demand maps directly to Denver Water's governing program.
- Commercial, industrial, domestic, irrigation, fire-line, and auxiliary-water-supply customers when Denver Water requires an approved assembly.
- Denver Water can assess a $250 penalty after three unanswered notification letters and can move service into suspension status when testing or installation is not completed.
- Program phone: 303-893-2444
- City route reviewed: 2026-04-04
Source-backed workflow
Denver Water is one of the clearest Colorado programs because it publishes annual reminder timing, irrigation season rules, a penalty path, and a direct reporting address for the cross-connection office.
Support guides
Read these before acting on the Denver workflow
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.
Anniversary date vs calendar deadline
Why some utilities track backflow tests by anniversary date, while others push owners into a calendar-season or hard-date deadline.
Residential vs commercial backflow rules
Why the local trigger is rarely just residential versus commercial, and how utilities actually split hazard, irrigation, multifamily, and managed-property cases.
Backflow test cost
How to think about annual testing, repair, and retest pricing without confusing a market quote with the compliance rule.