Skip to Main Content View Text-Only

Environmental Services

working for clean rivers

Phone: 503-823-7740

Fax: 503-823-6995

1120 SW 5th Avenue, Room 1000, Portland, OR 97204

More Contact Info

Southwest Portland Inflow and Infiltration (I & I) Pilot Projects

sources of I&IEnvironmental Services is working to reduce inflow and infiltration (I&I) into sanitary sewers in parts of southwest Portland. Sewage can back up into buildings and overflow to streams when rain and groundwater fill sanitary sewers to capacity.

Project Benefits

Participating in a project will include, at no cost to property owners:

  • Assessment of the condition of the lateral pipe that connects your property to the public sewer
  • investigation of any connections to the lateral
  • Lateral repair or replacement if necessary, at no cost o the property owner
  • Site restoration after construction

Participating in a project is voluntary and property owners may decline any work the city proposes on their property.

Frequently Asked Questions

Information about I&I pilot projects

Middle Hillsdale Inflow and Infiltration Pilot Project

Main line construction is complete

Hillsdale East I&I Project

Project has been postponed