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Environmental Services

working for clean rivers

Phone: 503-823-7740

Fax: 503-823-6995

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

MS4 Quality Assurance Monitoring Plan

MS4 Quality Assurance Monitoring Plan 

The City of Portland recently updated the MS4 Quality Assurance Monitoring Plan in early 2013.  The monitoring plan fulfills requirements of the city's National Pollutant Discharge Elimination System (NPDES) Municipal Separate Storm Sewer System (MS4) permit. The Oregon Department of Environmental Services (DEQ) issued the permit to the City on January 31, 2011, for a third permit term (through January 30, 2016). 

The monitoring plan describes stormwater and surface water monitoring the city will conduct, including monitoring parameters, locations, and procedures. Monitoring data will be used to help evaluate and, if needed, modify the city's stormwater management program.

For More Information

Contact Frank Wildensee at 503-823-2926.

Heartbleed Security Notice

A serious security vulnerability known as "Heartbleed" was recently discovered in OpenSSL, a popular software library commonly used by many websites on the internet to encrypt communication between a user's computer and a web server.

PortlandOregon.gov is NOT affected by this vulnerability as it does not use the OpenSSL software library. Please rest assured we are dedicated to protecting your security on this website.