Licensing Guides
State Septic License: How to Become a Septic Contractor in Washington
Septic, WA
Table of Contents
How Much Does It Cost to Get a Septic License in Washington?
How Long Does it Take to Get a Septic License in Washington?
Septic License Requirements in Washington
We all need safe, reliable sewage management for our homes and businesses. Those homeowners and businesses that rely on septic tanks, also known as on-site septic systems (OSS), depend on people who know how to install and maintain those systems while protecting public health.
The Washington State Department of Ecology reports about one-third of Washington households rely on septic systems.
According to the Bureau of Labor Statistics (BLS), there are 27,900 septic tank servicers and sewer pipe cleaners nationwide, and Washington employs 1,630 of them. The projected growth rate nationally is expected to be 8% from 2022 to 2033, adding 3,000 of these skilled workers to the ranks. In the state of Washington, according to CareerOneStop, the U.S. Department of Labor’s job search website, the projected growth rate is 11% for septic tank servicers and sewer pipe cleaners.
If you’re thinking about starting a septic business or working in this field, you need to know the requirements in your state or local jurisdiction. This guide will help you determine what you need before you get started in Washington.
Who Issues Septic Licenses in Washington?
In Washington State, the Washington State Department of Licensing issues licenses for On-Site Wastewater Treatment System Designers. Professional engineers can design systems without obtaining this license.
Local health departments or environmental health divisions handle certifications and septic permit applications for septic system installers, pumpers, and maintenance service providers.
Types of Septic Licenses in Washington
The statewide septic license in Washington is the On-Site Wastewater Treatment System Designer, which allows you to design systems for new installations, alterations, and repairs.
There are also local requirements for septic system professionals enforced through public health and environmental health services departments. For example, King County certifies Installers, Maintainers, and septic tank Pumpers/Haulers.
Steps to Get a Septic License in Washington
To obtain an On-Site Wastewater Treatment System Designer license, follow these steps:
Meet application requirements: Possess a high school diploma or its equivalent and four years of experience showing increased responsibility as defined in WAC 196-32-020.
Submit your application, a completed Washington On-Site Wastewater Designer/Inspector Law Review, and your experience verification.
Pay $200 fee.
Pass the exam with a score of 80% or higher.
To become an Associate/Master Installer in King County, follow these steps:
Complete a health officer-recognized course in the basics of septic systems and installation.
For Associate: Provide proof that you are working under a Master Installer.
Apply for the exam. The Associate exam incurs a $220 fee, and the Master exam incurs a $352 fee.
Master applicants must obtain bond and general liability insurance.
Submit certification application with required fee.
The Liquid Waste Pumper/Hauler and On-Site System Maintainer certification process in King County is relatively the same, with variations for experience requirements and fees.
How Much Does It Cost to Get a Septic License in Washington?
There’s a $200 fee to obtain the On-Site Wastewater Treatment System Designer license.
The King County certifications cost:
Associate Installer: $220 exam fee and $129 certificate fee
Master Installer: $352 exam fee and $176 to $352 certificate fee depending on when you apply
Liquid Waste Pumper/Hauler: $215 exam fee, certificate fee of $304 for business owner or $133 for employee, and $122 per vehicle
On-Site System Maintainer: $352 exam fee and $176 to $352 certificate fee depending on when you apply
King County offers a fee schedule online.
What Business Owners Need to Know
Getting the most out of a septic installation technician, no matter where they are in their licensing journey, takes work. ServiceTitan cloud-based, all-in-one septic business software gives technicians and business owners the technology they need to do the work efficiently, and the data they need to do it smartly.
ServiceTitan features:
SMS communications that keep customers informed about the technician’s visit.
Location-specific service history, including recorded calls, accessible from the mobile app.
Required forms that ensure every job is done right, driving consistency.
The ability to build multi-option proposals with photos, on-site, in minutes.
Sales presentations that make conversations with customers easier and drive the average ticket.
Mobile payment acceptance, eliminating lost checks and increasing cash flow.
To learn more, schedule a demo with a product expert today.
How Long Does it Take to Get a Septic License in Washington?
Septic system designers need four years of experience to obtain licensure. In King County, you need two years of experience to become an On-Site System Maintainer. Other King County certifications require a training course and exam.
Washington Septic Training Programs and Schools
King County requires certificate applicants to take a course offered through one of the following providers:
Washington Septic Licensing Exam Details
Exams are required for the state Designer license, as well as the King County certifications. Other counties may require exams as well. It’s important to verify licensing requirements in each locality.
Exams cover types of systems, drainfields, proper land use, and more.
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Do I Need to Renew My Washington Septic License?
Yes, On-Site Wastewater Treatment System Designer licenses must be renewed every two years for a $128 fee. King County certificates expire on Dec. 31 each year. The renewal fee is $129 for Associate Installer, $352 for Master Installer, $305 for Liquid Waste Pumper/Hauler business owner or $133 for employee, and $352 for On-Site System Maintainers.
Does Washington Reciprocate Septic Licenses?
No, Washington does not have reciprocity agreements for septic professionals.
National Septic Certifications
Other certifications can help you demonstrate your proficiency to potential employers and clients. The National Association of Wastewater Technicians and The National Onsite Wastewater Recycling Association offer certifications. Those and other professional certifications are not required but can add to your marketability and therefore increase your opportunity to make more money.
Continuing Education
Licensed Designers must complete 30 hours of continuing education every renewal cycle. King County licensed professional Installers and Maintenance Providers must complete eight continuing education hours every year.
Resources
You can stay up to date on all septic industry news several ways:
Check top septic blogs, including ServiceTitan’s blog.
Read about the latest industry trends, and discover ideas on how to grow your septic business.
Listen to top septic podcasts like ServiceTitan’s “Toolbox for the Trades” podcast.
The Washington State Department of Health offers videos on sewage disposal system basics, septic system inspection, and more.
The states have licensing requirements for other trades, too. You can find out more about how to get an HVAC, plumbing, electrical, or general contractor license in Washington, or in any of the other 49 states and the District of Columbia through the ServiceTitan Licensing Hub.
