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NPDES Pretreatment Program in Region 10

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About Region 10's Pretreatment Program

EPA implements the industrial pretreatment program on tribal lands within Region 10. Alaska, Idaho, Oregon, and Washington have been delegated by EPA to implement their own pretreatment programs (see "Delegated State Programs" below).


Michael Le (
Pretreatment Coordinator
U.S. EPA, Region 10
NPDES Permits Unit
1200 Sixth Avenue, Suite 155
Seattle, Washington 98101-3140

Delegated State Programs

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Learn More About Pretreatment

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Publicly Owned Treatment Works (POTWs) with Pretreatment Programs under EPA Oversight

EPA is the Control Authority for the following pretreatment programs in Region 10:

  • City of Anchorage, Alaska
  • City of Puyallup, Washington

For more information about EPA's oversight role, visit Pretreatment Roles and Responsibilities.

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Pretreatment Guidance

Regional Guidance

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