A failed section of the TCEQ Landscape Irrigator exam carries no waiting period. The Texas Commission on Environmental Quality (TCEQ) bars a repeat only until the result arrives, and the computer-based test gives the result at the center. The limit that does bite is the application. Under 30 TAC 30.20(d) it “expires either after 365 days from date of application or failing the same examination four times, whichever occurs first.”
How soon you can sit it again
30 TAC 30.20(c) says a candidate with an approved application who fails “may not repeat an examination until receiving notification of examination results for that particular examination.” On the computer that notice is immediate: TCEQ’s computer-based testing page lists, as of October 2026, an immediate exam score and a printed analysis among what the test offers. The same page says retesting after a failed written test “is allowed, so long as your application is in an approved status”, and that one immediate retest on the same day is offered at some exam sites. TCEQ’s exams page says the same about a same-day retest. The word is “some”: ask the center before counting on it.
So the practical wait is the testing center’s calendar. Each sitting is booked with the center, the center sets its own testing fee, and TCEQ’s page warns that some centers do not refund it. The rule allows for that fee too: 30 TAC 30.30(g) lets an examination or reexamination fee be charged where TCEQ has another entity run the exams.
The two limits on the application
The application ends at whichever comes first:
| Limit | What the rule says |
|---|---|
| Time | 365 days from the date of application (30.20(d)) |
| Failures | The same examination failed four times (30.20(d)) |
When it ends, 30.20(d) requires a new fee and a new application before the same exam can be taken again, and 30.20(e) adds: “Any scores for repeat examinations taken after an application expires will not be applied to the issuance of the license.” The fee with each initial application is $111, nonrefundable, under 30.30(c), so a new application means paying it again.
One wrinkle in the dates. 30.20(d) counts the 365 days from the date of application. 30 TAC 30.18(c) says an approved application “shall be valid for one year from the date of application approval.” The two start on different days, and TCEQ’s license page puts processing at about 3 to 4 weeks between them. Nothing in the rules says which governs. Planning your last sitting from the date you applied keeps you inside both.
Sections are passed one at a time
TCEQ’s license page sets the pass mark at “70 percent for each section”, and the minutes of TCEQ’s Irrigator Advisory Council (IAC) have treated the sections as separate for years. The February 2017 minutes list, among questions for TCEQ staff, why irrigators only have to retake the failed sections (IAC minutes, February 9, 2017, p. 2), and in May 2019 TCEQ staff described the test as having “four parts that could be taken and passed at different times” (IAC minutes, May 9, 2019, p. 1).
What no source answers
Two questions matter to a retaker, and neither the rules nor TCEQ’s pages answer them.
Does “four times” count per section? 30.20(d) counts failures of “the same examination”. TCEQ’s pages count the pass mark per section. Nothing published says whether three failed Hydraulics sittings and one failed Backflow sitting use up all four, or only three of the four Hydraulics gets.
Do passed sections carry into a new application? 30.20(e) says scores from sittings after an application expires do not count. It says nothing about sections passed before it expired, and no TCEQ page does either.
Both answers belong to TCEQ’s licensing staff, on the number the license page gives for registration questions, 512-239-6133. The time to ask is before a fourth attempt.
What the analysis gives you
The questions stay confidential: 30.20(a) says examinees “may not share them with anyone.” What a failed candidate gets is an analysis, printed at the center on the computer test, and 30.20(i) requires TCEQ’s executive director to provide one on a written request as long as it “does not compromise the fair and impartial administration of future examinations.” TCEQ has not published what the analysis shows.
TCEQ has not published whether a retake repeats the first paper. The FAQ keeps the short answers on retakes and the application window.