Wastewater & Stormwater

Wastewater & Stormwater


The purpose of sanitary sewer system is to funnel sewage to the wastewater treatment plant. The Wastewater Collections Division operates and maintains the sanitary sewer system.  The system consists of sanitary sewer mains, debris interceptors and lift stations. A well maintained system protects human health and protects the environment.  Division duties include:

  •  video inspections,
  • mechanical and chemical treatment of sewer clogs,
  • routine lift station maintenance,
  • system repair and replacement.


The Dalles RV Dump Station

Help us avoid costly sewer back-ups

Think Before You Flush

Wipes Clog Pipes and Pumps Video
(Used with permission)

Think Before You Wash

Food service establishment guide for grease interceptor compliance

Pretreatment of wastewater guide for industrial users


Wastewater treatment preserves the beauty and bounty of the Columbia River. The Wastewater Treatment Plant operates under contract by Jacobs. Public Works staff provides administrative oversight for the plant. The City treats sewage to protect human health through disinfection. Treatment also removes debris and chemicals that can harm plants, fish and animals. The water discharged must meet stringent Oregon Department of Environmental Quality regulations.

The purpose of storm water management is to protect property and the environment. The Wastewater Collections Division also operates and maintains the stormwater conveyance systems. Water collected by the system is not treated before discharge into the Columbia River. We ask citizens to ensure that only rain goes down the drain. Together we can protect human health and the environment.

Keep sanitary sewer and stormwater collection systems separated

For more information on the Wastewater System contact Public Works


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