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The City of Portland, Oregon

Environmental Services

working for clean rivers

Phone: 503-823-7740

Fax: 503-823-6995

1120 SW 5th Ave, Suite 613, Portland, OR 97204

More Contact Info

Mobile Washers

Mobile Washing Program

The City requires mobile washing businesses to collect and discharge washwater into the sanitary sewer system. Washwater generated from mobile washing activities is prohibited from entering the City's stormwater system, city streets, or right of ways. It must be collected and discharged to the sanitary or combined sewer system. To discharge washwater to the sanitary or combined sewer system, businesses must obtain a Mobile Washer discharge authorization from the City. This authorization requires implementation of best management practices (BMPs) to ensure that all washwater is collected, meets City discharge limits, and is properly disposed.  Examples of businesses that require a Mobile Washer Discharge Authorization are mobile fleet washers as well as mobile power washing, graffiti removal, and trash receptacle cleaning services.


Mobile Washer Discharge Authorization Application

Program Application Fillable PDF

Mobile Washer Annual Certification

Annual Certification Fillable PDF