To meet the Texas septic installer license requirements, you need to complete a TCEQ-approved training course, submit an application with the $111 fee, and pass the installer exam at an approved testing center. The Texas Commission on Environmental Quality issues two tiers of on-site sewage facility (OSSF) installer licenses: Installer I for standard septic systems and Installer II for all system types, including aerobic treatment units.1Texas Commission on Environmental Quality. Occupational Licenses: On-Site Sewage Facilities (Septic Systems) Which tier you pursue depends on the systems you plan to install.
Installer I covers conventional work: septic tanks, absorptive drainfields, unlined evapotranspiration drainfields, leaching chambers, gravel-less pipe systems, and pumped effluent drainfields. Installer II covers everything Installer I does plus aerobic treatment units and other advanced technologies.1Texas Commission on Environmental Quality. Occupational Licenses: On-Site Sewage Facilities (Septic Systems) Most installers start at tier I and upgrade after building experience.
TCEQ also issues separate OSSF credentials for apprentices, designated representatives, site evaluators, and aerobic maintenance providers. Those are different licenses with different rules; the requirements below apply to the installer tiers only.
Installer I Requirements
The entry-level license has no minimum education and no prior work experience requirement.1Texas Commission on Environmental Quality. Occupational Licenses: On-Site Sewage Facilities (Septic Systems) You need to:
- Complete the Installer I basic training course through a TCEQ-approved provider. The course covers soil evaluation, system design, installation methods, and state regulations. Approved providers are listed on the TCEQ training page.2Texas Commission on Environmental Quality. Training Courses for Occupational Licensing
- Submit your application and the $111 fee to TCEQ.
- Pass the Installer I exam at an approved computer-based testing center.
Training has to be done before you apply. TCEQ won’t process an application without proof of course completion, so don’t try to schedule the exam first and work training in around it.
Installer II Requirements
The Installer II upgrade adds documented hands-on experience on top of training and testing. The path differs depending on whether you’re coming from an Installer I license or an apprentice registration.1Texas Commission on Environmental Quality. Occupational Licenses: On-Site Sewage Facilities (Septic Systems)
Upgrading From Installer I
You must have held your Installer I license for at least one year and document your work by submitting one of the following:
- Sworn statements from at least three individuals you performed installation work for, none of whom can be related to you by blood or marriage
- A sworn statement from a designated representative who approved at least three installations you completed
- Other work experience documentation approved by the TCEQ executive director
Upgrading From Apprentice Registration
You must have held your apprentice registration for at least two years and submit either:
- A sworn statement from the licensed installer who supervised your work
- A sworn statement from a designated representative who witnessed you working on at least six installations
- Other approved documentation of your experience
In both cases you also complete the Installer II basic training course, pay the $111 application fee, and pass the Installer II exam.1Texas Commission on Environmental Quality. Occupational Licenses: On-Site Sewage Facilities (Septic Systems) The experience documentation is where most Installer II applications stall. Collecting sworn statements from clients or designated representatives takes time; start well before you plan to apply.
How to Apply
TCEQ’s Occupational Licensing Electronic Application (OLEA) is the fastest route.3Texas Commission on Environmental Quality. Occupational Licensing Electronic Application (OLEA) Instructions A paper application can be mailed to the TCEQ Cashier’s Office in Austin instead. Either way, include:
- Your completed application with personal identification details
- Proof of training course completion
- The $111 application fee1Texas Commission on Environmental Quality. Occupational Licenses: On-Site Sewage Facilities (Septic Systems)
- For Installer II applicants, sworn experience statements or other approved work history documentation
Once TCEQ reviews your submission and confirms everything checks out, you’ll receive authorization to schedule your exam.4Texas Commission on Environmental Quality. Licensing Exams You can’t register before your application is approved, so build processing time into your timeline.
The Installer Exam
Both exams are given at TCEQ-approved computer-based testing centers across Texas. Content covers installation procedures, state regulatory requirements under 30 TAC Chapter 285, and system-specific technical knowledge at the appropriate license level.4Texas Commission on Environmental Quality. Licensing Exams You get your score immediately, with feedback on areas you missed.
If you don’t pass the first time, you can register to retest. Coordinate directly with your testing center on availability and any retesting fees. Passing is the last step before TCEQ issues your license.
Renewing Your License
OSSF installer licenses are valid for three years. To renew, you need 24 hours of continuing education from TCEQ-approved providers before your expiration date.5Texas Commission on Environmental Quality. Renewal Requirements for Each License Type TCEQ usually mails a reminder several months out, but tracking the date yourself is safer than relying on the notice reaching you.
For licenses expiring on or after September 1, 2025, Texas law provides a 180-day grace period after expiration to submit a renewal application, with additional fees. The grace period does not extend the deadline for completing your 24 CE hours; those still have to be done before the original expiration date.6Texas Commission on Environmental Quality. Occupational Licensing If you miss both the expiration date and the 180-day window, you may have to reapply and retest from scratch.
Local Permits Are a Separate Step
A state license alone does not authorize you to break ground. Local authorized agents, usually county or municipal health departments, administer the OSSF permitting program in their jurisdictions and review permit applications, conduct inspections, and investigate complaints under Texas Health and Safety Code Chapter 366 and 30 TAC Chapter 285.7Texas Commission on Environmental Quality. How to Become a Texas On-Site Sewage Facility (Septic System) Authorized Agent Before each installation, you’ll need an OSSF construction authorization from the agent covering the property, and the agent will inspect the finished system against state criteria or any stricter local standards before it can be put into service.
Working Without a License
TCEQ can impose administrative penalties of up to $5,000 per violation for unlicensed OSSF work under Texas Water Code Chapter 7.8Texas Commission on Environmental Quality. RG-253: Penalty Policy Each violation is evaluated separately, so a single job site can produce multiple stacked violations. An installer working without credentials also has no legal standing to enforce payment disputes, and a homeowner who hires one often has no recourse when a system fails. The $111 application fee and training costs are a small fraction of what one enforcement action can cost.