IrrigatorExam

Questions and answers

What people ask about the Texas Landscape Irrigator Exam. Every answer comes from a Texas Commission on Environmental Quality (TCEQ) page or document and says which one. Where TCEQ publishes nothing, we say so instead of guessing.

IrrigatorExam is independent and not affiliated with the Texas Commission on Environmental Quality.

Questions answered
26
Topics
7

The exam itself

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What is on the Landscape Irrigator exam?

Separate sections, each marked on its own, and 30 TAC s. 30.120(b) requires an irrigator to pass all of them. TCEQ does not publish their names or an outline; candidates and schools report Principles of Installation, Principles of Backflow, Principles of Hydraulics and Landscape Irrigation Design. The nearest official list of topics is the Basic Irrigator course outline in TCEQ's curriculum guidance: an introduction to landscape irrigation, design, installation, and testing, maintenance and troubleshooting, with hydraulics and backflow prevention named inside them.

How many questions is each section, and how long is the exam?

TCEQ's computer-based testing page gives the Landscape Irrigator exam a six-hour time limit, and its license page warns that not every testing center can hold an exam that long. TCEQ publishes no count of questions per section. Candidates report Principles of Installation 50, Principles of Backflow 20, Principles of Hydraulics 29 and Landscape Irrigation Design 50 questions; treat those as reports, not TCEQ's figures. This site's timed runs split the six hours as Installation 2 hours, Backflow 50 minutes, Hydraulics 1 hour 10 minutes and Design 2 hours, which is our own split and not TCEQ's.

What score do you need to pass?

70 percent on each section. 30 TAC s. 30.20(b) sets the minimum passing score for a TCEQ licensing examination, and TCEQ's license page says the minimum applies to each section of the irrigator exam. A strong score on one section does not carry a weak one.

How much math is there?

TCEQ publishes no count of calculation questions. What the rule does carry are the numbers an irrigator designs to: 30 TAC s. 344.62, for one, holds PVC piping to a flow velocity of no more than five feet per second and sprinkler spacing to within ten percent of the published radius. TCEQ's exams page allows a non-programmable calculator in the room, which is the level of arithmetic to expect.

Can you take anything into the room?

A pen or pencil, scratch paper the proctor hands out and collects, and a non-programmable calculator. Phones, smart watches, books, notes, dictionaries, translators and any other electronic device are not allowed in the room or during breaks. The exam is closed book, and 30 TAC s. 30.20(h) makes bringing written material or a device into the room a breach of the examination rules.

Do you have to draw an irrigation plan on the exam?

No drawing tools are needed. TCEQ's computer-based testing page says no graph paper or engineering scale is required for the Landscape Irrigator exam. What 30 TAC s. 344.61 does set out is what a plan must show, drawn to scale: the seal, a North arrow, a legend, the zone flows and the design pressure among them. Expect to read a plan rather than draw one.

How to study for it

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Does TCEQ publish a study guide?

No. TCEQ's exam preparation page tells candidates to study the current training materials from the required course, and for irrigation it names one document: the Irrigation Technician vocabulary list, in English and Spanish. Everything else on the market is somebody else's reading of the rules, this site included, which is why every answer here names the section it came from.

Do you have to take a course before sitting?

Yes. 30 TAC s. 30.120(b) requires an irrigator to complete and pass the basic irrigator training course before the license, and TCEQ's curriculum guidance says that course should run to not less than 32 hours of instruction. TCEQ approves the training providers, and its license page lists the course first, before the application.

Which version of the rules does the exam expect?

The rules as they stand. 30 TAC Chapter 344 was last amended with effect from July 26, 2020, and that amendment touched nearly every section; TCEQ's quick reference guide lists what changed. Several TCEQ study documents still online were written for the rules of January 1, 2009, so a figure in one of them is checked against the current rule before this site uses it.

Applying and booking

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How do you get approved to sit the exam?

Finish the basic irrigator course, then apply to TCEQ: the application, a criminal history attestation and the fee. TCEQ reviews it and mails an approval letter, which its license page puts at about three to four weeks when nothing is missing. The approval comes first; a testing center will not seat a candidate without it.

How do you book the exam, and where do you sit it?

With the approval letter in hand, contact a TCEQ-approved computer-based testing center; TCEQ's testing page lists them by region, from Amarillo to Laredo. Book with the center, not with TCEQ. Because the Landscape Irrigator exam runs six hours, confirm that the center can hold an exam that long before you schedule: not every center can.

How long does an approved application last?

Under 30 TAC s. 30.20(d) an application expires 365 days from the day it was made, or after the same examination is failed four times, whichever comes first. After that a new application and a new fee are needed before the exam can be taken again, and a score from a sitting after the application expired does not count toward the license.

How do you get testing accommodations?

Ask TCEQ, not the testing center, and before booking. TCEQ's exams page asks for its special accommodations request form with supporting documentation, and says not to register for the exam until the request is approved; a licensing specialist then arranges the date, time and place. 30 TAC s. 30.20(f) gives any qualified applicant with a disability the right to ask.

Sitting it

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What do you bring on the day?

Your approval letter. TCEQ's testing page says to bring it, and if you have lost it, a printout of your application status showing it approved will do. The center's own fee is paid to the center, and some centers do not refund it, so check its rules on arrival times and changes when you book.

Can you take the exam in Spanish?

Not as TCEQ's list stands. Its computer-based testing page lists the exams offered in Spanish, and the Landscape Irrigation Technician exam is on it while the Landscape Irrigator exam is not. The vocabulary list TCEQ publishes for irrigation gives each term in English and Spanish.

Results and retakes

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When do you find out whether you passed?

At the center. A computer-based exam gives the score straight away, with a printed analysis, and TCEQ's testing page says a license is issued within one week of the exam to a candidate who passes. The rule itself, 30 TAC s. 30.20(b), allows up to 45 days for results to be sent.

How long do you wait to retake a failed section?

There is no fixed waiting period. 30 TAC s. 30.20(c) says only that a candidate may not repeat an examination until the result of the last one has been received, and a computer-based exam gives it at once. TCEQ's testing page adds that some centers offer one retest on the same day, and that a retest is allowed while the application stays approved.

How many attempts do you get, and do passed sections count?

Four at the same examination on one application: under 30 TAC s. 30.20(d) the application expires on the fourth failure, or after 365 days, and a new application and fee start the count again. The sections are passed one at a time: the minutes of the Irrigator Advisory Council meeting of May 9, 2019 record the exam as four parts that can be taken and passed at different times.

Can you see what you got wrong?

Not the questions: 30 TAC s. 30.20(a) makes the content of every licensing examination confidential. What you get is an analysis. The computer-based exam prints one at the center, and the rule requires TCEQ to provide an analysis when a candidate asks in writing, as long as it does not compromise later examinations.

After you pass

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Can you start work the day you pass?

Not until the license is issued, which TCEQ's testing page puts within one week of a passed exam, and not without a seal. 30 TAC s. 344.40 requires every irrigator to obtain a seal on being licensed and to have the seal and the license in hand before doing any landscape irrigation work.

Who needs the license, and who is exempt?

Under the Occupations Code's license requirement, anyone who sells, designs, installs, maintains, alters, repairs or services an irrigation system, consults on one, or connects one to a water supply. 30 TAC s. 30.129 lists who is exempt, among them a licensed plumber working within the plumbing laws, a person working under the direct supervision of a licensed irrigator, and a homeowner working on their own home.

What is the difference between an irrigator and an irrigation technician?

Under 30 TAC s. 344.30 a technician connects systems to a water supply and installs, maintains and repairs them under the supervision of a licensed irrigator; an irrigator may do all of it and design and sell as well. TCEQ's license page adds that a current technician license expires when the irrigator license is issued, because the irrigator license covers the same work.

When does the license expire, and what does renewing take?

Every three years, as TCEQ's license page says. To renew, 30 TAC s. 30.122(b) requires an irrigator to complete 24 hours of approved training, and the hours have to be finished before the license expires. The renewal also takes an application, a criminal history attestation and the renewal fee.

What if the license has already expired?

The statute and the rule say different things today. Water Code s. 37.006, as amended with effect from September 1, 2025, lets a license that has been expired for up to 180 days be renewed at a higher fee, and after that the exam has to be passed again. 30 TAC s. 30.24 still allows only 30 days after expiry, and a rule change to match was proposed in the Texas Register of August 14, 2026 and not yet adopted when this was written. Renewing inside the 30 days meets both.

What it costs

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What does the exam cost?

The application fee is $111, paid to TCEQ with the application; it is the fee for a three-year license and is nonrefundable. The computer-based testing center charges its own seat fee on top, and each center sets its own. 30 TAC s. 30.30(c) sets the license fee and makes it nonrefundable. TCEQ's testing page says each center sets its own testing fee and that some centers do not refund it.

What does this site cost?

The free questions cost nothing and need no account. The full bank is $79 USD plus tax, once, with no subscription and no renewal. Every answer in it names the section of 30 TAC, the Texas statute or the public document it comes from, which is what you are paying for.