Upon installation and annually thereafter
Aurora Water Backflow Prevention
Aurora Water is a strong supporting Colorado utility because it publishes a clean annual-testing rule, online submission requirement, and ownership-responsibility language.
Annually
Castle Rock Water Cross-Connection and Backflow Program
Castle Rock is a strong Colorado page because annual testing, tester certification, and the live town tester list all line up on the same utility workflow.
Annually by July 31
City of Arvada Backflow and Cross-Connection Control Program
Arvada is a high-intent Colorado utility because the city program is deadline-driven, fee-backed, and tied to a visible tester list.
At least annually, plus on installation and after repair
City of Aspen Cross Connection Control AKA Backflow Prevention Program
Aspen is a high-quality Colorado utility because the city publishes BSI-driven annual testing, a certified tester list, and device-level guidance for irrigation, fire systems, and containment assemblies.
Upon installation, after repair, and annually
City of Durango Backflow Prevention
Durango is an unusually actionable Colorado local page because it publishes the annual cadence, five-day reporting deadline, and direct certified-tester list alongside explicit examples like irrigation, fire suppression, and beverage dispensers.
On the city certification cycle and whenever changed water use creates new cross-connection risk
City of Englewood Backflow Prevention and Cross-Connection Control Program
Englewood is a strong utility page because it captures when a property enters the city program, not just a generic test due date.
At installation, annually, and when moved or repaired
City of Grand Junction Backflow Prevention Program
Grand Junction is a useful Colorado city because it turns sprinkler, fire-sprinkler, and chemical-use backflow rules into straightforward local guidance.
Upon installation and annually thereafter
City of Greeley Cross-Connection Control Program
Greeley is a strong Colorado utility because it combines annual testing, Spry portal reporting, and an official local tester list.
Annually
City of Lafayette Backflow Compliance Program
Lafayette is a strong Front Range utility because it publishes clear annual due dates by device type, a BSI workflow, and enforcement language with fees and shutoff risk.
Annually with utility due dates between April and September
City of Longmont Backflow Prevention and Cross-Connection Control
Longmont is a very strong Colorado utility because it combines annual testing, enforcement timing, irrigation-specific upgrade rules, and a real portal transition.
At installation and at least annually after that
City of Thornton Cross Connections and Backflow Prevention
Thornton is a strong Colorado city because it names the covered classes, publishes annual-testing language, and gives a clean portal-driven reporting path.
Upon installation and annually thereafter
City of Westminster Cross-Connection Control and Backflow Program
Westminster is a strong Colorado utility because it openly covers domestic, irrigation, and fire line services in the same annual-testing framework.
Annually after the assembly is in the program
Colorado Springs Utilities Backflow Prevention
Colorado Springs Utilities is a strong Colorado page because it shows how the utility actually runs the testing workflow: portal registration, certification uploads, five-day test entry, and survey-first rules.
Upon installation and annually thereafter
Denver Water Cross-Connection Control and Backflow Prevention Program
Denver Water is a strong flagship Colorado utility because it publishes the annual reminder cycle, irrigation season rule, reporting path, and an explicit penalty for ignored notices.
Upon installation and annually thereafter
Fort Collins Utilities Backflow Prevention and Cross-Connection Control
Fort Collins is a strong Colorado utility because it combines annual testing, BSI reporting, a local tester list, and explicit water-service suspension risk.
Annually and after installation, repair, or replacement when required
Parker Water and Sanitation District Backflow and Cross-Connection Control
Parker is a strong Colorado utility because annual testing, repair deadlines, and reporting all live on district-run pages instead of a vague contractor handoff.
