King County Industrial Waste Program
Partnering with industries to prevent pollution
We administer regulations to make sure the wastewater generated by industries is treated properly. Many industries must pretreat wastewater before sending it to the sewer. This protects the wastewater treatment process, workers, facilities, and water quality.
And it works. Our waterways are cleaner today than in previous decades because business practices have improved.
Industrial Users: click here to learn aboutyour responsibilities and requirements
during the COVID-19 Pandemic.
KCIW has revised the rules that govern our work.
Click here for more information.
Get authorization to discharge to the King County sewer system.
- Learn more about getting authorization for your business sector
- Download application forms
- Requirements for discharging wastewater
Manage your permit/authorization
Hot topics
Learn more
- General fact sheet
- Technical assistance
- Newsletters
- Related water quality agencies and organizations
Emergencies and spills
Rewards and recognition
Contact us
- info.kciw@kingcounty.gov
- 206-477-5300
What to do in case of a spill to the sewer 