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NPDES Stormwater Discharge Permits -
Phase II Municipalities (MS4)
Municipal sources that need to obtain permits are classified as either "Phase I" or "Phase II" municipal separate storm sewer systems (MS4s). Phase I MS4s are those with populations greater than 100,000, while regulated Phase II (or "small") MS4s are those municipalities with populations less than 100,000 located within Census Bureau-defined Urbanized Areas. Federal regulations also provide EPA and the states the discretion to require other MS4s outside of Urbanized Areas to apply for a permit.
- List of Cities and
Counties with Phase II municipal stormwater permits PDF
- Fee tables for municipal NPDES individual permits
Oregon Phase II NPDES Municipal Separate Storm Sewer System (MS4) Permits
City of Ashland
City of Bend
City of Corvallis
City of Keizer
City of Medford
City of Philomath
City of Springfield
City of Troutdale
City of Turner
City of Wood Village
Benton County
Lane County
Marion County
Polk County
Rogue Valley Sewer Services
For stormwater-related questions, contact the appropriate DEQ regional office.
For general information about NPDES Stormwater Discharge Permits, contact Benjamin Benninghoff by phone at (503) 229-5185 or by e-mail
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Projects and Programs Publications and Forms Laws and Regulations Public Notices Permits and Licenses Databases/GIS
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