Licensing Guides
New Hampshire Septic License: How to Become a Septic Contractor in New Hampshire
Septic, NH
October 1st, 2026
Table of Contents
What Is the Mean Wage for a Septic Professional in New Hampshire?
How Much Does It Cost to Get a Septic License in New Hampshire?
How Long Does it Take to Get a Septic License in New Hampshire?
How Can I Prepare for the Septic License Exam in New Hampshire?
Does My New Hampshire Septic License Work in Any Other State?
What Are the Penalties for Unlicensed Septic Work in New Hampshire?
Learning a trade requires hard work and determination. You can't rush the process, but the time you put into learning how to become a septic professional can lead to a career that is long-lasting, lucrative, and fulfilling.
There are 30,650 septic tank servicers and sewer pipe cleaners nationwide, according to the Bureau of Labor Statistics (BLS), and New Hampshire employs 310 of them. Employment is projected to grow 8% from 2024 to 2034 across the country, with about 2,900 job openings expected each year, according to CareerOneStop, the U.S. Department of Labor's job search website. In New Hampshire, the projected growth rate is higher at 13%.
Skilled tradespeople are in demand, and septic work is essential across the state. According to the New Hampshire Department of Environmental Services (NHDES), an estimated 60% of households in New Hampshire use private septic systems, so trained installers and designers have steady, meaningful work.
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 in the state of New Hampshire.
Septic License Requirements in New Hampshire
Is a license required to work as a septic professional in New Hampshire? Yes. Septic work is regulated statewide, not locally, and you must hold the appropriate NHDES permit at both key levels of the trade: Individual Sewage Disposal System (ISDS) Installer and Individual Sewage Disposal System Designer. New Hampshire RSA 485-A establishes these requirements uniformly across the state.
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 wastewater treatment systems (OWTS), depend on people who know how to install and maintain those systems.
Types of Septic Licenses in New Hampshire
New Hampshire RSA 485 lists the licensing guidelines for septic installers and designers.
Individual Sewage Disposal System Installer
The licensee is responsible for the physical construction and installation of new septic systems based on approved designs, including septic tanks, leach fields, and other system components according to approved plans.
Individual Sewage Disposal System Designer
The licensee is responsible for performing site assessments and designing septic systems that comply with New Hampshire state regulations. Permitted designers can perform septic inspections and site assessments, percolation tests, and topographical assessments, as well as prepare and submit plans and permit applications to NHDES for approval.
Both permits are issued by NHDES and require passing a permitting exam. Neither credential formally supervises the other — an Installer builds systems from an approved design, while a Designer prepares and certifies those designs. Many professionals hold both permits to work across the full project lifecycle. Under RSA 485-A:36 and RSA 485-A:35, each permit is valid for a two-year cycle and requires continuing education to renew. There is no apprentice or journeyman tier for septic work in New Hampshire — you qualify by demonstrating working knowledge and passing the applicable exam.
Steps to Get a Septic License in New Hampshire
Demonstrate a sound working knowledge of the procedures and practices required in the site evaluation, design, and operation of subsurface sewage or waste disposal systems.
Pass the permitting exam.
Pay the $80 exam fee.
Mail the application to the NH Department of Environmental Services – Pease Office (not in Concord): 222 International Drive, Suite 175, Portsmouth, NH 03801.
Benefits of Getting a Septic License in New Hampshire
There are several benefits to earning your New Hampshire septic Installer or Designer permit:
Most important, a permit is required by law under RSA 485-A to install or design septic systems in New Hampshire.
A permit is proof of your knowledge and skill in the trade.
Only permitted professionals can legally prepare and submit septic plans, install approved systems, and certify construction to NHDES.
A permit lets you operate and advertise a septic business.
It gives you a competitive advantage and can increase your earning potential.
It protects your customers and your business by ensuring work meets state standards.
What Is the Mean Wage for a Septic Professional in New Hampshire?
Nationally, the annual mean wage for septic tank servicers and sewer pipe cleaners is $53,500, according to the U.S. Bureau of Labor Statistics. In New Hampshire the annual wage is considerably higher at $ 63,270. Pay tends to rise with experience, certifications, and business ownership, and it can vary by region within the state.
The terms "mean wage" and "median wage" can be confusing. Here is the difference:
Mean wage is the mathematical average of all wages.
Median wage is the point at which half of workers earn less and half earn more, and it is often a better indicator of what most people actually earn.
Salaries can vary widely depending on where you work and factors like experience, certifications, and whether you own the business.
How Much Does It Cost to Get a Septic License in New Hampshire?
The fee for a Septic Designer or Installer permit is $80. There are no additional licensing fees.
What Business Owners Need to Know
Getting the most out of a septic system 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.
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 to Get a Septic License in New Hampshire
Becoming a permitted septic professional in New Hampshire is straightforward, though the exam schedule requires some patience. Here is what the path looks like.
DEMONSTRATE WORKING KNOWLEDGE: You must show a sound working knowledge of the procedures and practices used in the site evaluation, design, and operation of subsurface sewage or waste disposal systems. Many candidates build this knowledge through hands-on field experience or a preparation course.
APPLY: Complete the permit application for Installer or Designer and pay the $80 exam fee. Note that any application for an individual sewage disposal system must be prepared by a permitted designer, except when a homeowner is installing for their own primary domicile.
TAKE THE EXAM: The NHDES Subsurface Systems Bureau administers Designer and Installer exams in the spring and fall. Exam dates are assigned after your application is accepted, and written notification of your exam date is mailed or emailed to you.
RECEIVE YOUR PERMIT: After you pass, NHDES issues the permit within five days.
How Long Does it Take to Get a Septic License in New Hampshire?
The Department issues the permit within 5 days of passing the exam. However, the NHDES only administers examinations two times per year, in the spring and fall. This means you may need to wait up to 6 months to take the exam.
New Hampshire Septic Training Programs and Schools
The University of New Hampshire offers a 6-week course covering New Hampshire administrative code Env-Wq 1000 rules to help students prepare for the permitting exam, issued by the NHDES Subsurface Systems Bureau.
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New Hampshire Septic Licensing Exam Details
The NHDES administers Designer and Installer exams in the spring and fall. Exam occupancy is filled on a first-come, first-served basis. The postmark date on your application is used to determine the date of registration.
Exam dates will be assigned after an application has been accepted. Written notification of acceptance and the exam date will be mailed or emailed to you. The exam fee is $80.
For more information, review the Installer exam prep sheet or Designer exam prep sheet.
How Can I Prepare for the Septic License Exam in New Hampshire?
Both the Installer and Designer exams are open book, so knowing the reference material and how to navigate it quickly is key. Other than a calculator, electronics such as phones, laptops, and tablets are prohibited.
The Installer exam is given in two parts with three hours to complete it. Part 1 has approximately 40 multiple-choice, true/false, and short-answer questions covering sewer pipes, septic tanks and effluent pipe, effluent disposal areas, general site work, and administrative rules. Part 2 has approximately 30 questions that require reading ISDS profiles, recalculating elevations, laying out effluent disposal areas from swing-ties, scaling site plans, and sketching contours.
The Designer exam is also open book and takes a minimum of seven hours. Part 1 has approximately 40 short-answer questions requiring calculations, including determining wastewater flow, sizing ISDS components, and applying Env-Wq 1000 rules. Part 2 requires hand-drafting four ISDS layouts, including at least one innovative or alternative treatment design. According to NHDES, a passing score of 80% is required on each part, and scores are not averaged.
Review the appropriate prep sheet closely, take practice exams to get comfortable with the format and timing, and get plenty of rest the night before your test.
The New Hampshire Department of Environmental Services is responsible for permitting Individual Sewage Disposal System Installers and Designers.
According to the NHDES, “Any structure that is connected to a water supply must be connected to a wastewater disposal system such as a sewer system or individual sewage disposal system. Applications for individual sewage disposal systems or septic systems must be prepared by a permitted designer. With the exception for homeowners installing for their primary domicile, septic systems must be constructed by a permitted installer.”
For more information, check out the Department’s website at www.des.nh.gov, review the FAQs page, or visit the NHDES office at 29 Hazen Drive in Concord. If you require accessibility due to vision or hearing impairment, dial 711 to connect with Relay NH.
Does My New Hampshire Septic License Work in Any Other State?
No. A New Hampshire ISDS Installer or Designer permit is valid only in New Hampshire. If you want to work in another state, you will need to apply for a license there and follow that state's rules and exam requirements. Likewise, a septic credential from another state does not automatically authorize you to work in New Hampshire.
Does New Hampshire Reciprocate Septic Licenses?
No, New Hampshire doesn’t allow reciprocity with any other states for Individual Sewage Disposal System Installers and Designers.
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.
Other Requirements Unique to New Hampshire
A few New Hampshire-specific rules are worth knowing:
Applications for any individual sewage disposal system must be prepared by a permitted designer, with an exception for homeowners installing for their own primary domicile.
Under RSA 485-A:36, a homeowner may repair or replace the system for their own domicile without an Installer permit, as long as they follow NHDES rules. For new construction of a future domicile, the homeowner must still hire a permitted designer or installer to certify the work and must file an affidavit pledging to keep the property as their domicile for at least two years.
Designs must comply with New Hampshire administrative code Env-Wq 1000, the rules that govern subsurface systems.
Are There Septic Scholarships in New Hampshire?
While there are no septic-installer-specific scholarships in New Hampshire, aspiring septic professionals can pursue several relevant awards:
The New Hampshire Water Pollution Control Association awards an annual $1,000 scholarship to a New Hampshire college or vocational student pursuing a degree in water pollution control, environmental science, or civil engineering.
The National Onsite Wastewater Recycling Association offers its Emerging Professionals Scholarship for students enrolled in a trade school, college, or university who are pursuing a wastewater or environmental credential and are under 35 or have fewer than five years in the field.
The National Association of Wastewater Technicians offers the William Hapchuk Memorial Scholarship for bachelor's degree students in fields such as environmental and biological sciences, civil engineering, or business.
How Can Someone Verify My Septic License in New Hampshire?
Clients and employers can confirm your permit status through the NHDES Subsurface Bureau OneStop portal:
Go to the NHDES Subsurface Bureau OneStop portal.
Select "Designer And Installer Query" from the main menu.
Search by the professional's name to view their permit and status.
The same portal also lets you search septic system records by property owner, address, designer, installer, or approval number.
When Can a Septic License Get Suspended in New Hampshire?
Under RSA 485-A:36, an Installer permit may be suspended, revoked, or not renewed only for just cause, including installing waste disposal systems in violation of the rules or refusing to correct defective work. A Designer permit may likewise be suspended, revoked, or not renewed only for just cause under RSA 485-A:35. In both cases the permit holder has an opportunity to be heard before action is taken.
A permit can also be administratively suspended for failure to renew on time. If the renewal application, fee, and required documentation are not filed within 30 days of expiration, the permit is deemed suspended, and if it is not reinstated within 60 days, it is deemed void. Working with a suspended or void permit is itself a violation.
Note: The information above should not be considered legal advice. For detailed and specific information, refer to the official New Hampshire RSA 485-A.
What Are the Penalties for Unlicensed Septic Work in New Hampshire?
Performing septic installation or design work without the required permit, when the homeowner exemption does not apply, is a violation of New Hampshire RSA 485-A and can carry serious consequences:
A civil penalty of up to $10,000 for each violation, or for each day of a continuing violation, under RSA 485-A:54.
Under RSA 485-A:43, a court-imposed civil forfeiture of up to $10,000 per day per violation, plus a separate administrative fine of up to $2,000 per offense.
A violation is classified as a misdemeanor for an individual or a felony for a business entity.
The attorney general may seek a court injunction to stop the unlawful work.
Note: The information above should not be considered legal advice. For a detailed explanation, refer to the official New Hampshire RSA 485-A.
Do I Need to Renew My New Hampshire Septic License?
Septic System Designer and Installer permits are valid for 2 years from Jan. 1 of years ending in odd numbers to Dec. 31 of years ending in even numbers. You can renew your permit by mail or via the New Hampshire online licensing system. The renewal fee is $80.
Continuing Education
Septic system Designers and Installers must complete a minimum of 6 hours of approved continuing education every 2 years. The NHDES maintains a list of approved CE courses.
This 6-hours-every-2-years requirement is set in RSA 485-A:36 for installers and RSA 485-A:35 for designers. If you hold both permits, the same six hours satisfy both. The Granite State Onsite Wastewater Association (GSOWA) is one NHDES-approved provider, offering continuing education credits through its annual conference.
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 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 New Hampshire, or in any of the other 49 states and the District of Columbia through the ServiceTitan Licensing Hub.
