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The annual report summarizes King County Industrial Waste’s (KCIW) achievements in the areas of operations, special projects and activities, and public outreach. The report meets pretreatment program requirements in the National Pollutant Discharge Elimination System (NPDES) permits issued to the division’s wastewater treatment plants.

2018 Annual Report

In 2018, violations by KCIW-regulated companies and facilities did not cause problems at the County’s wastewater treatment plants. However, a palm oil spill from a business caused interference at South Treatment Plant in the City of Renton. There were no NPDES exceptions for effluent discharges into Puget Sound at any of the plants attributed to an industrial facility, and metal concentrations in biosolids continued to meet the strictest U.S. Environmental Protection Agency standards.

The following are highlights of KCIW activities in 2018:

  • Issued 251 wastewater discharge approvals (new, renewed, and revised control documents including letters of authorization, discharge authorizations, waste discharge permits, and verbal approvals)
  • Inspected and monitored significant industrial users and took enforcement actions against those that violated requirements
  • Revised King County Code to better align industrial user fees from a wastewater discharge volume system to cost-of-service model using categories and tiers
  • Obtained funding and conducted a Request for Proposal process to select a vendor to replace KCIW’s outdated Pretreatment Information Management System database
  • Prioritized and completed an initial evaluation of 66 high-priority facilities as a result of the 2016 Industrial User Survey, which surveyed over 17,000 businesses in the County’s wastewater treatment system

Download report (9.1MB), March 2019.

photo of Seattle waterfront

KCIW is a delegated pretreatment program that regulates businesses and industries that discharge wastewater to the sanitary sewer system in order to protect workers, local and regional sewer and treatment infrastructure, effluent quality and biosolids. KCIW issues wastewater discharge approvals, conducts inspections, performs sampling, tracks compliance, and takes enforcement actions against facilities that violate requirements. We provide technical assistance and offer environmental compliance awards for companies that consistently meet requirements.
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