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Wastewater Treatment

King County, Washington

For questions about the Wastewater Treatment Division website, please send an e-mail message or contact us at:

King Street Center
201 S. Jackson St., Suite 500
Seattle, WA 98104-3855
Phone: 206-477-5371
Fax: 206-684-1741
Telecommunication device for the deaf (TTY): 711

Get Directions to our office location in Seattle, Washington.

Staff Contacts

King County Wastewater Treatment Division. Join our team. Come make clean water with us!

Imagine an internship where you...

  • Contribute to the protection of public health and the environment
  • Conduct field inspections, sewer sampling, flow monitoring and manhole locates
  • Learn about project management including cost estimating, budget and schedule for large construction and maintenance projects
  • Create Web sites and troubleshoot information technology (IT) issues
  • Work on Green Building and Leadership in Energy and Environmental Design (L.E.E.D) projects
  • Learn Geographical Information System (GIS) databases and map locales
  • Participate in pump replacement data collection and support
  • Present your individual or team project to wastewater staff and peers

See yourself in one of these internships (sample list of current and past internships)

  • GIS: Link GIS information of sewer system facilities and scanned engineering drawings; learn field verification, conduct quality assurance and control, and review spatial components of existing data. Upon completion of the project, users will be able to go to the Internet, click on a map, and have the choice of photo, drawing, attribute and other linked information.
  • Project Management - Equity and Social Justice: Learn and participate in many of the tasks involved in the siting and design of a major capital project in a diverse neighborhood. Duties could include reviewing and understanding project documents, assisting in outreach opportunities associated with the project including community events and in-person meetings, understanding and assisting in implementation of the Envision™ Sustainable Infrastructure Rating System, learning about the environmental review process and assisting with considerations of how the King County Wastewater Treatment Division can better consider equity and social justice in project decisions.
  • Industrial Waste: Become familiar with pretreatment regulations and the use of control documents such as permits, Discharge Authorizations and Letters of Authorization. Learn about the work of sampling specialist and investigator positions through shadowing of staff in the field during visits to industrial facilities. Learn/develop skill in managing information using an Oracle based database; search & data entry. Learn customer service skills; how to contact, interact with facility contacts and the public as a regulator.
  • Resource Recovery - Biosolids: Learn about resource recovery efforts, including how these efforts relate to sustainable soil management; operational techniques of a biosolids carbon and nutrient recycling program in commercial forests and agricultural crops; the environmental monitoring conducted to ensure protection of public health and the environment; the style of communication used to convey scientific information to the interested public. Duties could include: Compiling and analyzing data (water quality parameters), Writing reports describing forestry field projects and water quality monitoring results, developing web content, assisting staff with miscellaneous project management tasks.
  • Resource Recovery - Energy: Learn about resource recovery efforts, including how these efforts relate to energy efficiency and renewable power generation; and become more familiar with industrial, energy-using equipment, its associated relative energy uses, and how it fits into an industrial facility’s electrical system. Duties could include gathering electrical energy use data and compiling into relevant groupings, working with plant staff to develop acceptable signage template to display energy use/cost, developing plan/map/schedule to install signage around facility, assisting staff with miscellaneous project management tasks.
  • Community Relations: Provide community relations support for multiple projects required under the combined sewer overflow (CSO) consent decree, including large traditional infrastructure projects, green stormwater infrastructure projects, and a rebate program for property owners to capture stormwater on their property. Participate in planning and hosting public events, developing and distributing communication materials, attending community events, making connections with community members.
  • Project Management: Learn all aspects of project management including developing project scopes, planning, design, coordinating with other King County personnel, and the permitting process. Become familiar with relevant regulations, coordinating drawings and specifications, budget and scheduling.
  • Asset Management: Gain hands-on experience developing, designing, and implementing business systems and processes that increase efficiency and cost savings in maintenance and operations. Engage in fieldwork, planning, meetings, and work with IT customers to develop key user requirements.
  • Project Control and Construction Management: Assist with project control and/or project managers in support of the WTD Major Capital Program. Assignments will deal with project control functions including cost, schedule, budget and contract administration. Field work at construction sites provide hands-on experience.

Our internship program provides for a variety of hands-on experiences in a number of engineering and environmental fields.

Manhole Inspection

Measuring Flow

At Computer

In Manhole

Who are we? | What do we do? | Employment opportunities | Salaries and benefits | Internships

Current postings

  • Summer 2016 College Internships application closed 3/21
  • Summer 2017 College Internships will be posted Spring 2017 
  • For more information on internships, please contact WTD HR at

WTD Blog

Other internships & resources offered by King County