Greenville Utilities Commission: backflow testing rules

Greenville Utilities Commission at a glance

When the test is due

Commercial and industrial customers must install and test backflow assemblies on their service connections, at installation and every year after, using a GUC certified tester. Source.

How the report is filed

The GUC test form tells testers to email the completed form to backflow@guc.com. Source.

Approved testers

42 companies on Greenville Utilities Commission's own list, read October 6, 2026, each with a "Utility-Approved Tester" badge on its card here. The list.

Who must test

• The GUC test form requires any needed repairs to a tested assembly to be made within 10 business days. Source.

Tester registration

• GUC runs tester certification courses each spring and fall, and every backflow tester must finish a recertification course every two years. Source.

Approved testers

• GUC links its current list of certified testers from guc.com. Source.

Program

• Greenville Utilities Commission runs a cross connection control program to keep backflow out of its water supply. Source.

From notice to filed report, the steps are the same everywhere: how a backflow test goes.

Other water utilities in North Carolina

• Charlotte Water
• Raleigh Water
• Cape Fear Public Utility Authority
• City of Asheville Water Resources
• City of Concord Water Resources
• City of Gastonia
• City of High Point
• Fayetteville Public Works Commission

Read October 7, 2026. Program page: guc.com.

Backflow testers near Greenville

What the badges mean

All testers near Greenville · North Carolina roster