What matters here
Longmont requires annual testing by certified testers and publishes an enforcement ladder starting 45 days before the due date and ending with civil penalties and possible water suspension.
Annual testing
City of Longmont Backflow Prevention and Cross-Connection Control annual backflow testing
Longmont requires annual testing by certified testers and publishes an enforcement ladder starting 45 days before the due date and ending with civil penalties and possible water suspension.
Utility: City of Longmont Backflow Prevention and Cross-Connection Control
Last verified: 2026-04-05
Due basis: Longmont requires annual testing by certified testers, says new and replacement assemblies must be tested after installation, and publishes a notice-and-enforcement sequence that starts 45 days before the due date and can escalate to civil penalties and water suspension.
Highlights
- 45-day reminders go out before the due date.
- 31 days past due triggers a fee and city-contracted outreach.
- 91 days past due can trigger up to $500 per assembly and service interruption.
Workflow
Workflow
- Check the annual Longmont due date for the property.
- Use a certified tester and submit on time.
- If the schedule slips, resolve it before the fee and penalty ladder escalates.
Residential
- Longmont is unusually useful for residential pages because the city explicitly mentions irrigation, fire suppression, and boiler scenarios.
- Single-family homes are not automatically in the program, but the city gives concrete examples of when they are.
Commercial and managed properties
- Commercial and multifamily intent is extremely strong because Longmont publishes a real notice, fee, and penalty ladder.
- This is one of the best non-Texas utility pages for recurring commercial lead intent.
Tester routing
No public tester route is live for this utility yet. Stay on the official program path and confirm the scope directly with the utility.
FAQ
Local questions people actually ask
Does City of Longmont Backflow Prevention and Cross-Connection Control require annual backflow testing?
Annually with utility due dates between April and September. Longmont requires annual testing by certified testers, says new and replacement assemblies must be tested after installation, and publishes a notice-and-enforcement sequence that starts 45 days before the due date and can escalate to civil penalties and water suspension.
Who is affected by City of Longmont Backflow Prevention and Cross-Connection Control backflow rules?
Longmont customers with backflow assemblies, especially non-single-family properties, irrigation services, and homes with higher-hazard conditions like fire suppression or boilers.
How do I submit or confirm a backflow test for City of Longmont Backflow Prevention and Cross-Connection Control?
Use the official utility workflow and submission methods listed on this page: Longmont backflow prevention program. Program phone: 303-651-8416.
Where should I look for testers for City of Longmont Backflow Prevention and Cross-Connection Control?
No public tester directory is live for this utility yet. Use the official utility page first and do not infer approval from a generic directory.