1120 SW 5th Avenue, Room 1000, Portland, OR 97204
Environmental Services issues permits to industries based on their wastewater characteristics or amount of discharge. The permits require industries to monitor for pollutants of concern and to comply with reporting schedules, along with general conditions listed in the permit.
Permitted Industrial User types include:
For a look at the City of Portland’s legal authority to implement and enforce this program refer to:
The National Pollutant Discharge Elimination System (NPDES) and the Clean Water Act have regulated water quality since the early 1970s. This federal program identifies and regulates water pollution from point sources (such as the sewage treatment plant and outfall pipes) and non-point sources (stormwater runoff from streets).
The City of Portland has NPDES permits for its two sewage treatment facilities, the Columbia Boulevard Wastewater Treatment Plant and the Tryon Creek Wastewater Treatment Plant. The permits require the city to manage discharges to the treatment plants. In 1982, Portland began permitting industrial users and requiring them to pretreat wastewater discharged to the sewer system.
Pretreatment reduces the amount of pollutants and neutralizes wastewater to meet discharge requirements. Types of pretreatment include pH neutralization, solids separation, metals removal and oil/water separation. Many industries have installed pretreatment systems and control mechanisms to reduce pollutants in their discharge to meet the standards.
The City of Portland has implemented cost recovery mechanisms to alleviate the burden on sewer ratepayers of maintaining the sewer system. The city charges industries annual permit fees to pay for a portion of pretreatment program administrative and sampling costs. The city determines fees for each industrial customer using a risk-based tier system.
The Industrial Extra Strength Sewer Charge (ESSC) Program targets industries that discharge high-strength wastewater to the sewer system. These industrial customers may or may not have discharge limits, but the pretreatment staff monitors them for five-day Biochemical Oxygen Demand (BOD) and for Total Suspended Solids (TSS) concentrations. Discharges exceeding 300 mg/L BOD or 350 mg/L TSS are subject to the ESSC program. The city calculates extra strength services charges using flow rates and monitoring results.
For more information, contact Industrial Pretreatment at 503 823-5600.