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Longmont 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.

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City: Longmont Utility: City of Longmont Backflow Prevention and Cross-Connection Control Cadence: Annually with utility due dates between April and September Last verified: 2026-06-29
Local answer

What to check for Longmont

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.

  • 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.
  • Notice or device clue: Look for the SwiftComply or C3Swift account, device, address, or notice record.
  • Who is affected: Longmont customers with backflow assemblies, especially non-single-family properties, irrigation services, and homes with higher-hazard conditions like fire suppression or boilers.
  • Acceptance rule: Report acceptance depends on using the named portal or online submission path; keep proof that the report was submitted.
  • Report workflow: Longmont SwiftComply backflow test submission workflow
  • Credential gate: Certified tester status
  • Program phone: 303-651-8416
Notice-to-closeout map

Source-backed procedure before the record is treated as closed

This is the working path for Longmont notices: match the authority, confirm the tester gate, use the accepted submission route, and keep proof that the report was accepted.

Authority City of Longmont Backflow Prevention and Cross-Connection Control
Notice trigger Look for the SwiftComply or C3Swift account, device, address, or notice record.
Tester gate Confirm tester eligibility with the governing utility before scheduling.
Submission route Longmont SwiftComply backflow test submission workflow
Proof to keep Report acceptance depends on using the named portal or online submission path; keep proof that the report was submitted.
Failure branch Open failed-test workflow before treating repair, retest, or resubmission as complete.
Local signals

Signals that matter before you act

  • 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.
Other Longmont routes

Stay inside the city intent cluster

Longmont SwiftComply backflow reporting portal Find the Longmont SwiftComply backflow report route, notice or device identifiers, tester gate, and proof of accepted submission.
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Submit Longmont SwiftComply backflow test reports How to submit a backflow test report in Longmont through SwiftComply, including notice clues, tester requirements, and accepted filing proof.
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Longmont failed backflow test What to do after a failed backflow test in Longmont: repair, retest, and confirm accepted report submission with the utility.
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Longmont irrigation backflow testing Check Longmont irrigation backflow testing triggers, device rules, tester requirements, and the official utility workflow.
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Longmont fire-line backflow testing Check Longmont fire-line backflow testing triggers, assembly rules, tester requirements, and the official utility workflow.
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Workflow

Longmont workflow order

  1. Check the annual Longmont due date for the property.
  2. Use a certified tester and submit on time.
  3. If the schedule slips, resolve it before the fee and penalty ladder escalates.
City FAQ

Longmont questions before you act

Does Longmont 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.

What should I check on an annual notice for Longmont?

Check the due date, service address, device record, accepted tester route, and submission method before scheduling.

Who controls the rule for Longmont?

Longmont search demand is routed to City of Longmont Backflow Prevention and Cross-Connection Control. Longmont customers with backflow assemblies, especially non-single-family properties, irrigation services, and homes with higher-hazard conditions like fire suppression or boilers.

What costs or fees should I expect for Longmont?

Testing is market-priced, but Longmont adds a $10 passing-test portal charge and escalating late-compliance costs. Repair and retest costs rise quickly on irrigation upgrades and failed assemblies. The main cost pressure is avoiding late fees, civil penalties, and shutoff scheduling.