Castle Rock Water Cross-Connection and Backflow Program
Open the Castle Rock certified backflow tester list
- Last verified 2026-06-29
- Annually
Colorado tester routes
Colorado approved backflow tester lists by utility.
Use this page to find Colorado utility routes where BackflowPath has a published official tester-list path. The governing utility page remains the route that decides the list and reporting workflow.
6 official tester routes
State guide: Colorado backflow testing requirements
Local utility rules stay canonical
Official routes
Open the utility list before choosing a tester
Each route below points to a utility page that separates the official authority list from non-official provider discovery.
City of Arvada Backflow and Cross-Connection Control Program
Open the Arvada certified backflow testing companies PDF
- Last verified 2026-06-29
- Annually by July 31
City of Aspen Cross Connection Control AKA Backflow Prevention Program
Open Aspen's certified tester list
- Last verified 2026-06-29
- At least annually, plus on installation and after repair
City of Durango Backflow Prevention
Open Durango's certified tester list
- Last verified 2026-06-29
- Upon installation, after repair, and annually
City of Greeley Cross-Connection Control Program
Open the Greeley local certified backflow testers list
- Last verified 2026-06-29
- Upon installation and annually thereafter
Fort Collins Utilities Backflow Prevention and Cross-Connection Control
Open the Fort Collins local certified backflow tester list
- Last verified 2026-06-29
- Upon installation and annually thereafter
Statewide certification is not the same as utility approval
Many searches mix certified, registered, and approved tester language. BackflowPath keeps these routes tied to the actual utility list or portal source shown on the local page.
Guides that clarify tester status
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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Backflow reporting portals
How BSI, SwiftComply, and utility customer portals change the real testing workflow after the field work is done.
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