On Monday, May 27, 2024 all City Offices will be closed for the Memorial Day holiday.
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City of The Dalles, OR

Water Distribution



Backflow prevention assemblies are required to be tested at the time of installation, any repair or relocation; at least annually or more frequently as determined by the water supplier.

Backflow assembly testers complete several hours of training and complete proficiency exam to become certified by the State of Oregon. Testers must recertify every two years.
The City provides a courtesy tester list with the annual test reminder to make it easy to find a certified professional to test an assembly.

More information about backflow prevention is in the brochure Keep Your Water Drinkable, linked below.

Call The Dalles Water Distribution Division for a copy of the courtesy tester list, (541) 506-2013.

The Water Distribution Division is responsible for the infrastructure that provides an uninterrupted supply of clean, safe drinking water for the citizens and businesses of the City of The Dalles. The Division also is responsible for maintaining adequate water volume and pressure for city-wide firefighting efforts.

The drinking water distribution system includes 3 deep wells (which normally provide about 15 - 25% of the City’s annual water supply), 5 storage reservoirs, 3 booster pumping stations, 100+ miles of water mains, 16 separate service/pressure zones (incorporating 62 pressure reducing valves), more than 700 fire hydrants, about 5,083 water service connections and 5 ground water (dewatering) well systems. Operations, maintenance, monitoring and most upgrading projects are performed by the Water Distribution Division crew. The City’s Cross Connection Control (backflow prevention) program is also operated within this Division.

Read Public Works Department Project Press Releases

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Water Tips for Your Home & Business

Find it, Flag it, Fix it: A Checklist for Your Landscape  Encuéntralo, Marcarlo, Arreglalo: Una Lista de Verificación para Su Paisaje

Prevent Frozen Pipes

Water Conservation

Water Leak Information

Reopening for Business - Water Quality in Building Plumbing

City of The Dalles Guidance

Oregon Health Authority Guidance

Backflow Prevention Information for Customers

Keep Your Water Drinkable

Backflow Prevention Information for Testers

Backflow Prevention Assembly Installation Permit (No fee at this time)

For more information please contact Public Works.

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