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The City of Portland, Oregon

Environmental Services

working for clean rivers

Phone: 503-823-7740

Fax: 503-823-6995

MAILING ADDRESS: 1120 SW 5th Ave, Room 1000, Portland, OR 97204

More Contact Info

Batch Discharges

The Industrial Pretreatment Program issues batch discharge authorizations to businesses and projects that are required to discharge wastewater to the sanitary sewer system. Any requested discharges to the storm sewer system are forwarded to the appropriate agencies. The discharges are typically of limited in duration and related to a specific site and/or operation. Some examples include: dewatering during construction activities, gray water from events, chlorinated water from hydrostatic tests, and power-washing with cleaners. 

The authorization to discharge is contingent on meeting City's discharge limits and avoiding sewer overflow. There are, at a minimum, specific limits for: discharge volume, rate of flow, and a "dry weather only" provision. Analytical results for certain pollutants may be required prior to approval. If the requested rate of discharge is above 50 gpm, the request must be sent to the City's engineering staff for modeling and approval -- which may take at least a week to process. 

Completed applications can be sent by email or mail. Please allow a minimum of 2 weeks for processing

Email (preferred method): batchdischarge@portlandoregon.gov

Mailing address:
Industrial Permitting Section – BES
Attn: Batch Discharge Program
Water Pollution Control Laboratory
6543 N. Burlington Avenue
Portland, OR 97203-5452

Fees & Charges

  • If applicable, the batch discharge volume to the sanitary sewer will charged at the fiscal year's commercial/industrial sewer rate. 
  • For the '19-'20 fiscal year, the batch discharge authorization service fee is $130 per occurrence and construction dewatering permits are $230 per occurrence. 

 For more information, questions or comments, please contact the Industrial Permitting Section of Environmental Services at batchdischarge@portlandoregon.gov or call 503-823-7026.