Licensing Guides
State Septic License: How to Become a Septic Contractor in Idaho
Septic, ID
June 16th, 2026
Table of Contents
Licensing Requirements for Septic Contractors in Idaho
Is a license required for septic work in Idaho? Yes. All septic system installations in Idaho must be performed by a licensed basic or complex installer, according to the Idaho Department of Environmental Quality (DEQ). The Individual/Subsurface Sewage Disposal Rules (IDAPA 58.01.03) establish minimum standards for septic system design, construction, and installation, and outline the requirements for obtaining an installer's registration permit. Operating without a valid license is a violation of state rules enforced through Idaho's seven public health districts.
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 sewage facilities (OSSF), depend on people who know how to install and maintain those systems.
About 36% of homes in Idaho use septic systems to treat sewage, according to the Idaho Department of Environmental Quality.
Idaho has 230 septic tank servicers and sewer pipe cleaners, according to the Bureau of Labor Statistics (BLS). There are 30,650 nationwide, according to the BLS.
The projected growth rate nationally is expected to be 8% from 2024 to 2034, according to CareerOneStop, the U.S. Department of Labor's job search website. In Idaho, the projected growth rate is 32% from 2022 to 2032 for septic tank servicers and sewer pipe cleaners.
If you're thinking about starting a septic business or working in the 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.
Licensing for Idaho septic installers is under the authority of the Idaho Department of Environmental Quality (DEQ). The DEQ posts information about septic and sewage on its website, including requirements for a basic or complex septic installer license, testing, and other technical guidance.
Idaho's seven public health districts administer these rules under a memorandum of understanding with DEQ. The public health districts license septic installers, view plot plans, issue septic permits for septic tanks and drainfields, inspect septic systems, and conduct site evaluations based on test holes to determine a location's suitability for a septic system.
The state of Idaho establishes rules governing subsurface sewage disposal systems in the Idaho Administrative Procedures Act (IDAPA). These rules set limitations on the construction and use of sewage disposal systems and outline registration permit requirements for septic system installers. It also requires nutrient-pathogen evaluations for specific systems or when certain conditions may impact surface water or groundwater quality.
Ultimately, these rules work to protect water quality and to prevent public health hazards.
Types of Septic Licenses in Idaho
To operate as a septic system installer in Idaho, you must have a basic or complex septic installer license. After applicants pass an exam, they obtain a septic installer license through the local public health district.
If a septic company employs several employees, only the person responsible for the installations, such as the owner, needs to pass the exam and obtain a license, according to the DEQ FAQ page.
Basic Septic Installer License
A basic septic installer license allows for the installation of standard and basic alternative systems. An alternative system is defined as a system in which DEQ issues design guidelines or designates as a simple modification of a standard system. A basic septic installer license allows for the installation of individual systems not requiring a complex septic installer license.
Scope of work: Installation of standard and basic alternative septic systems
Supervision rules: Only the person responsible for installations (e.g., owner) must be licensed. Employees work under the licensed installer
Experience requirements: None — no prior experience is required
Exam required: Yes — basic septic installer exam (free, open-book)
Bond requirement:$10,000 surety bond
Progression path: Can upgrade to complex installer license by passing the complex exam
Complex Septic Installer License
A complex alternative system installer license is required for the installation of the following systems:
Evapotranspiration systems
Extended treatment package systems (ETPS)
Lagoon systems
Large soil absorption systems
Pressure distribution systems
Proprietary wastewater treatment systems
Intermittent sand filters or sand mounds
Scope of work: Installation of complex alternative systems including evapotranspiration, ETPS, lagoon, LSAS, pressure distribution, proprietary, and sand filter systems
Supervision rules: Same as basic — only the responsible person must be licensed
Experience requirements: None — no prior experience is required
Exam required: Yes — complex septic installer exam (free, open-book)
Bond requirement:$30,000 surety bond
Progression path: Can obtain service provider certification for ETPS maintenance
Service Provider Certification
A service provider certification is required to operate, maintain, or monitor ETPSs, commonly known as aerobic treatment units that provide secondary treatment to septic tank effluent before it discharges into a drainfield. This certification is also required for any other complex alternative systems identified by the DEQ director.
In Idaho, property owners who install their own standard septic systems do not need an installer's license, but anyone hired to help with the system installation must have a license.
Steps to Get a Septic License in Idaho
The steps to getting the septic installer licenses listed above follow a similar process. You'll need to check with the public health district in your area to ensure you meet all the requirements, since some health districts require installer applicants to complete a training class before taking the exam.
The steps to get a license include:
Attend an installer training class or watch an installer video, if required by the local public health district.
Obtain a certificate of passing the basic or complex septic installer exam.
Complete a septic installer permit application to the local health district.
Pay a registration permit fee to the local health district.
Show proof of payment to a surety company for a surety bond of $10,000 for a basic installer license or $30,000 for a complex installer license.
Renew your license every year. Installers and service providers must take a state-approved refresher course every three years.
Once you're licensed, you'll be listed on the local health district's licensed installer list and may perform work anywhere in the state.
Benefits of Getting a Septic License in Idaho
There are many benefits to getting your Idaho septic installer license:
It is required by Idaho state rules (IDAPA 58.01.03) to be licensed to install septic systems for others.
A trade license is proof of your knowledge of Idaho's septic system standards and environmental regulations.
Only licensed installers can be listed on local health district approved installer lists, giving you visibility to potential customers.
Having a license protects your business and clients by ensuring work meets state health and environmental standards.
A license gives you a competitive advantage in Idaho's growing septic industry.
It also increases your earning potential — licensed installers in Idaho earn a mean annual wage of $48,990, according to the Bureau of Labor Statistics.
What Is the Mean Wage for a Septic Professional in Idaho?
The annual mean wage for septic tank servicers and sewer pipe cleaners in Idaho is $48,990, according to the U.S. Bureau of Labor Statistics. The national mean wage for this occupation is $53,500.
Wages vary based on experience and specialization. According to the BLS, here is the percentile breakdown for septic tank servicers and sewer pipe cleaners in Idaho:
10th percentile: $36,870
25th percentile: $38,310
Median (50th percentile): $46,860
75th percentile: $53,340
90th percentile: $64,000
The difference between "mean wage" and "median salary" can be confusing. The mean wage is the average of all wages in the occupation — you add all salaries together and divide by the number of workers. The median salary is the midpoint — half of workers earn more and half earn less. In Idaho, the median salary for septic professionals ($46,860) is lower than the mean ($48,990), which suggests that some higher earners pull the average up.
How Much Does It Cost to Get a Septic License in Idaho?
Getting a septic installer license costs anywhere from $50 to $200. The cost to get a septic installer license depends on the license fees of the specific local public health district.
The septic installer license fees for the seven public health districts are as follows:
Panhandle Health District (District 1): $50 for a basic license. $100 for a complex license
Public Health - Idaho North Central District (District 2): $50 for a basic license. $100 for a complex license
Southwest District Health (District 3): $130 for a basic license. $195 for a complex license
Central District Health (District 4): $125 for a basic or complex license
South Central Public Health District (District 5): $110 for a basic license. $200 for a complex license
Southeastern Idaho Public Health District (District 6): $75 for a basic or complex license
Eastern Idaho Public Health (District 7): $50 for a basic license. $100 for a complex license
Exam Fees
The Idaho septic installer exam is free for both the basic and complex exams, administered online through NOWRA.
Bond Costs
All septic installers must maintain a surety bond. According to the Idaho DEQ, the required bond amounts are:
Basic installer: $10,000 surety bond
Complex installer: $30,000 surety bond
The actual cost of a surety bond is typically a percentage of the bond amount (often 1%–15%), depending on the applicant's credit and financial history.
Training Costs
Some local public health districts offer free training classes or videos for prospective installers. Continuing education refresher courses, offered by the public health districts every three years, are also typically provided at no cost.
How to Get a Septic License in Idaho
Getting a septic installer license in Idaho is a straightforward process managed through your local public health district. Here's a detailed walkthrough:
Check with your local health district first. Idaho's seven public health districts administer septic installer licensing. Some districts require you to attend a training class or watch a video before you can take the exam, so contact your district office to confirm their specific requirements.
Study the reference materials. The exam draws from two key documents: Idaho's Technical Guidance Manual (TGM) for Individual and Subsurface Sewage Disposal Systems, and the Individual/Subsurface Sewage Disposal Rules (IDAPA 58.01.03). Both are available free on the DEQ website.
Pass the exam. Take the basic or complex septic installer exam online through NOWRA or in person at your local health district. The exam is free, open-book, untimed, and requires a score of 70% or higher to pass.
Obtain a surety bond. Purchase a surety bond from a bonding company — $10,000 for a basic installer or $30,000 for a complex installer.
Submit your application. Complete the septic installer permit application at your local health district, pay the registration fee, and provide your exam certificate and bond documentation.
Receive your license. Once the health district approves your application, you'll appear on the licensed installer list and may perform septic installations anywhere in the state.
What Business Owners Need to Know
Getting the most out of a septic installer license, no matter where technicians 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 Idaho?
Since there's no initial training or experience prerequisites for a septic installer license in Idaho, obtaining a license can be accomplished quickly. The specific time it takes to get a license depends on application processing times at the local public health districts.
Applicants must pass an exam, obtain a bond, and submit an application and fee to the local public health district to obtain a license.
Here is a general timeline breakdown:
Pre-exam training: Some health districts require a training class or video, which may take a few hours to one day.
Exam preparation and testing: Since the exam is open-book and untimed, preparation may take a few days of studying the Technical Guidance Manual and IDAPA 58.01.03.
Bond acquisition: Obtaining a surety bond from a bonding company can typically be completed in one to three business days.
Application processing: Processing times vary by health district but are generally completed within a few business days once all documentation is submitted.
In total, most applicants can obtain their license within one to two weeks, depending on their local health district's requirements and processing speed.
Idaho Septic Training Programs and Schools
In Idaho, some local public health districts require prospective septic installers to attend a training class or watch a video before applying for an initial license. The state also requires septic installers to complete one DEQ-approved refresher course every three years, offered by the local public health districts.
Here are some available training resources for prospective and current septic installers in Idaho:
Local health district training: Several of Idaho's public health districts offer installer training classes. For example, Public Health — Idaho North Central District provides a basic septic system installer training class covering regulations, system types, site evaluation, and installation practices. Contact your local public health district for available training in your area.
NOWRA online courses: The National Onsite Wastewater Recycling Association offers online installer training courses covering topics from soil and site concepts to advanced treatment systems.
DEQ refresher courses: The Idaho DEQ requires completion of one approved refresher course every three years. These courses are provided by the local public health districts, typically at no cost.
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Idaho Septic Licensing Exam Details
Septic installers in Idaho must pass either the basic or complex septic installer exam. Those wanting to take the septic installer exam can schedule an in-person exam with their local public health district or take the exam online through the National Onsite Wastewater Recycling Association, according to DEQ.
Some local health districts require applicants to take a training class or watch a training video before taking the examination, so it's a good idea to first check with your local public health district before taking the exam, to make sure you meet all the requirements.
The DEQ provides installer exam information on its septic page. It provides PDFs regarding septic installer online exam instructions and online exam FAQs. It also provides a link for the Idaho Septic System Installer Exam. Applicants will need to create an account before taking the basic or complex exam, both of which are free.
Exam questions are from Idaho's Technical Guidance Manual - Individual and Subsurface Sewage Disposal Systems (TGM), and the Idaho Administrative Procedures Act "Individual/Subsurface Sewage Disposal Rules and Rules for Cleaning of Septic Tanks" (IDAPA 58.01.03).
The exam is an open-book test. Testers must receive a score of 70% or more to pass. There are no time limits and applicants may take the test an unlimited number of times.
How Can I Prepare for the Septic License Exam in Idaho?
Since the Idaho septic installer exam is open-book, preparation focuses on becoming familiar with the reference materials so you can find answers efficiently during the test. Here are some tips:
Study the TGM thoroughly. Download and read through Idaho's Technical Guidance Manual before exam day. Bookmark or tab key sections so you can locate information quickly during the test.
Review IDAPA 58.01.03. Familiarize yourself with the Individual/Subsurface Sewage Disposal Rules, paying special attention to system requirements, installation standards, and permit procedures.
Attend a training class. Some Idaho public health districts offer installer training classes. Public Health — Idaho North Central District, for example, provides a basic septic system installer training class covering regulations, system types, site evaluation, and installation practices.
Take NOWRA training courses. The National Onsite Wastewater Recycling Association offers online installer training courses covering topics from soil and site concepts to advanced treatment systems.
Read the exam instructions. Before test day, review the Idaho Septic Installer Online Exam Instructions and the Online Exam FAQs provided by DEQ.
Do I Need to Renew My Idaho Septic License?
Yes. Septic installer licenses expire each year on Jan. 1 and require annual renewal with the local public health district.
To renew a license, septic installers must:
Submit a signed bond continuation certificate to the local public health district.
Pay the permit renewal fee, which varies based on specific fees from the local public health district.
Complete a DEQ-approved refresher course every three years.
Does Idaho Reciprocate Septic Licenses?
No, Idaho does not have reciprocity agreements with other states for septic licenses. Septic installers must pass an exam and obtain a basic or complex septic installer license from a local public health district in order to perform septic installations in the state.
Does My Idaho Septic License Work in Any Other State?
No. An Idaho septic installer license is valid only within Idaho. Septic licensing requirements vary significantly from state to state, and Idaho does not have reciprocity agreements with any other state for septic installer licenses. If you want to perform septic work in another state, you will need to meet that state's specific licensing requirements, which may include separate exams, experience requirements, and application processes.
Septic-Specific Requirements in Idaho
Beyond the installer license, Idaho has several environmental and technical requirements specific to septic system work:
Nutrient-pathogen evaluations: Idaho's Ground Water Quality Rule and Individual/Subsurface Sewage Disposal Rules require a nutrient-pathogen (NP) evaluation for certain proposed on-site systems, particularly when conditions may impact surface water or groundwater quality.
Site evaluations: Before a septic system can be installed, the local public health district must conduct a site evaluation based on test holes to determine a location's suitability. Property owners should have a site evaluation performed before applying for a permit.
Permit requirements: Every septic system installation requires a permit from the local public health district. The health district issues permits after reviewing the site evaluation and plot plan.
Large soil absorption systems (LSAS): Systems designed to handle 2,500 or more gallons per day require a complex installer license, an NP evaluation, and design by a professional engineer licensed in Idaho. These systems undergo plan and specification review by DEQ.
Septage handling:IDAPA 58.01.03 also establishes standards for pumping, cleaning, transporting, storing, and disposing of septage to prevent public health hazards.
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 add to your marketability by showing your commitment to industry standards and environmental health, potentially increasing your opportunity to make more money. You can also learn more about sewer systems and the wastewater industry through industry associations in Idaho. They include:
Other Requirements Unique to Idaho
Idaho's septic licensing system has several features that set it apart from other states:
Decentralized administration: Unlike states with a single licensing agency, Idaho's septic installer licenses are issued by the seven individual public health districts under a memorandum of understanding with DEQ. Fees, training requirements, and application procedures can vary by district.
Statewide validity: Once licensed through any health district, a septic installer may perform work anywhere in the state of Idaho.
Property owner exemption: Idaho allows property owners to install their own standard septic systems without a license, but anyone hired to help with the installation must be a licensed installer, according to the DEQ exam FAQs.
No experience prerequisite: Idaho does not require any prior work experience or apprenticeship to obtain a septic installer license. Applicants only need to pass the exam and obtain a bond.
Service provider certification: Installers who want to operate, maintain, or monitor extended treatment package systems (ETPS) must obtain a separate service provider certification from DEQ.
Are There Septic Scholarships in Idaho?
While Idaho does not have state-specific scholarships exclusively for septic professionals, there are national opportunities available:
The National Onsite Wastewater Recycling Association (NOWRA) offers scholarships for emerging professionals in the onsite wastewater industry. These scholarships support education and professional development for individuals entering the field.
The Idaho Rural Water Association provides training resources and may offer financial assistance for water and wastewater professionals in rural Idaho communities.
Contact your local public health district or industry associations for information about additional training grants or tuition assistance programs that may be available in your area.
How Can Someone Verify My Septic License in Idaho?
Customers, employers, or other parties can verify an Idaho septic installer license through the following steps:
Contact the local public health district where the installer is licensed.
Request verification of the installer's current license status, license type (basic or complex), and bond status.
Many health districts maintain a list of licensed septic installers. The Idaho DEQ also publishes a list of permitted septic system installers on its website.
When Can a Septic License Get Suspended in Idaho?
A septic installer license in Idaho can be suspended or revoked under several circumstances:
Failure to maintain continuing education: Installers who do not complete a DEQ-approved refresher course every three years will lose their installer's license.
Failure to renew: Licenses expire on January 1 each year. Failure to renew with the local public health district, including submitting a bond continuation certificate and paying the renewal fee, results in license expiration.
Bond lapse: If an installer's surety bond expires or is cancelled, the license is no longer valid.
Violations of IDAPA 58.01.03: Installing systems that do not comply with the Individual/Subsurface Sewage Disposal Rules, performing work outside the scope of the license type, or other rule violations can result in enforcement action by the local health district or DEQ.
What Are the Penalties for Unlicensed Septic Work in Idaho?
Performing septic installation work without a valid license in Idaho is a violation of IDAPA 58.01.03. Consequences can include:
Enforcement actions: Local public health districts have the authority to enforce septic regulations and can issue notices of violation to unlicensed individuals performing septic work.
Permit denial: Unlicensed installations often fail inspection, forcing costly removal and reinstallation by a licensed installer.
Financial liability: Unlicensed work is not covered by the required surety bond, leaving the installer personally liable for any damage to property or the environment resulting from improper installation.
Public health risk: Improperly installed septic systems can contaminate groundwater and surface water, potentially creating public health hazards that the Idaho DEQ is authorized to address.
Continuing Education
The Idaho Department of Environmental Quality requires completion of one course of continuing education for septic installers and service providers every three years. The state's public health districts provide these DEQ-approved continuing education courses.
Failure to stay current with continuing education requirements will result in the loss of your installer's license, according to Southeastern Idaho Public Health. Contact your local health district for upcoming course schedules and available dates. Courses are typically offered annually at district offices and cover updates to Idaho's septic rules and installation standards.
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.
States have licensing requirements for other trades, too. You can find out more about how to get an HVAC, plumbing, or electrical license in Idaho, or in any of the other 49 states and the District of Columbia, through the ServiceTitan Licensing Hub.
