Irrigation license in Texas: what TCEQ requires of anyone who touches a sprinkler system

In Texas, sprinkler work is licensed by the state's environmental agency, not by a plumbing or contractor board. The Texas Commission on Environmental Quality (TCEQ) runs three licenses, and a lawn company that starts fixing zones for customers is inside the first of them. The statute and rules come from Texas Public Law (its statute copy is dated May 2025) and Cornell's Legal Information Institute. TCEQ's own site would not connect from our network, so its pages were read through Internet Archive copies dated July 8 and April 18, 2026. Fees are the ones on those copies.

Who needs the license

The Occupations Code section 1903.251 says a person needs a TCEQ license to sell, design, install, maintain, alter, repair or service an irrigation system, to consult on one, to connect one to a water supply, or to inspect one for a city or water district. The rules define an irrigation system as a permanently installed assembly of parts that distributes water to landscape vegetation, and say it includes sprinklers.

Maintenance and repair are named in the same breath as installation. A crew that replaces a cracked valve or re-trenches a broken line for pay is servicing a system. Installing without a license is a Class C misdemeanor unless an exemption applies.

The exemptions a lawn company should read

The exemption rule is short. It exempts:

• a homeowner working on the home he or she lives in;
• anyone using a garden hose, hose sprinkler or hose-end product;
• a person working under the direct supervision of a licensed irrigator;
• the owner of a business that employs a licensed irrigator to supervise the irrigation services;
• an HOA member working on association land under half an acre;
• plumbers licensed in Texas, and engineers or landscape architects working in their profession.

The rule also has an entry that looks written for mowing crews, and isn't: contract gardeners and lawn caretakers are exempt only on land they own. A lawn company working on a customer's property does not get that exemption, and the rule adds that anyone exempt still has to follow the technical standards in Chapter 344.

The three licenses

License	What it lets you do	Course	Continuing education
Landscape Irrigator	Sell, design, consult, install, maintain, alter, repair or service a system, and connect it to a water supply	Basic Irrigator Licensing Course	24 hours
Irrigation Technician	Connect to a water supply and maintain, alter, repair or service a system under a licensed irrigator's supervision	Irrigation Technician Course, or the irrigator course	16 hours
Irrigation Inspector	Check permits, inspect systems, confirm the right backflow device is installed, pass test results to the water purveyor and investigate complaints	Irrigator course, a backflow tester course, and a water conservation or water audit course	24 hours

Source for the table: TCEQ's irrigator page. Technicians can't advertise or offer irrigation services under their own license, per rule 344.36. A technician license expires the moment a Landscape Irrigator license is issued to the same person, and an inspector can't own, consult for or work for an irrigation company.

Getting the Landscape Irrigator license

TCEQ lists no education or work experience requirement. The steps are:

1. Finish the basic irrigator course from an approved provider.
2. File the TCEQ application with a criminal history attestation and pay $111.
3. Wait for the approval letter. TCEQ puts processing at about three to four weeks if nothing is missing.
4. Register with a computer-based testing center and pass every section with at least 70 percent.

The exam runs six hours. TCEQ's page warns that not every testing center can seat a candidate for more than four, so ask the center before you book. The exam fee charged by the test center is not stated on the pages we read, and neither is the number of course hours.

Rule 30.120 has the same three requirements: the course, the exam and the general application rules. Out-of-state irrigators may qualify by reciprocity under section 1903.255, which lets TCEQ waive prerequisites for a license from a state it has an agreement with. North Carolina goes the other way and takes Texas licenses, as the North Carolina page explains.

Insurance and bond: none stated for irrigators

None of the TCEQ and statute pages we read puts an insurance or bond requirement on a Landscape Irrigator. TCEQ's renewal page does list a $1,000,000 liability policy for two other credentials, leaking petroleum tank specialists and underground storage tank contractors. Irrigators get no such line, so the limits you carry come from clients and your insurer instead.

The irrigation contract rule requires a written, signed contract for installation with the irrigator's name, license number, address, price and a TCEQ notice, plus the irrigator's seal. Vehicles used for the work must display the "LI" license number in letters at least two inches high on both sides, per rule 344.70. Ads carry it too. Your insurer will want to hear that you install, not only maintain. The landscaping insurance page explains why, and the general liability guide covers the mowing-route claims.

Renewal

Licenses last three years. To renew you complete the continuing education before the expiration date, file the renewal application and criminal history attestation, and pay the renewal fee. As of the TCEQ page copy read, that is $111 on or before expiration, $166.50 if filed 1 to 90 days late, and $222 for 91 to 180 days late. Past 180 days you start over with a new application and the exam.

House Bill 1237 took effect September 1, 2025. It allows the 180-day window, and a person with a renewal application in for a license expired 90 days or less can keep working until it is decided. The late window does not extend the CE deadline: missing the hours by the expiration date means denial, whenever in the 180 days you file.

Running a lawn company that does irrigation

The usual setup is an owner who is not licensed and a licensed irrigator on the payroll. Rule 344.31 calls that owner an exempt business owner, who must have an irrigator in charge of all irrigation services and must verify the license of every irrigator and technician working for the business. The irrigator in charge, under rule 344.35, answers for the permits, contracts, advertising and work done under his or her license. The exemption rests on that supervision.

A pass-through contract is the other route: a written contract between the builder and a licensed irrigator or exempt business owner for all or part of the irrigation. Under rule 344.71, the contract has to name the irrigator and license number and give a way to reach them for warranty work. Spraying is covered on the Texas pesticide license page, and other states sit on the irrigation license hub.