Studying for a Louisiana water or wastewater operator exam? You're in the right place. Pick your discipline below: each tab has the certification levels, how Louisiana names them, and the practice tests that match.
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Choose your certification
How Louisiana classifies drinking-water operators
Louisiana (LDH Office of Public Health with a statutory Committee of Certification, under LAC 48:V Chapter 73) certifies five categories, each in Classes 1 through 4 sized by population served (Class 4 highest, over 25,000): Water Treatment, Water Distribution…
Full breakdown in the FAQ below.
Choose your Louisiana certification
Water Treatment Operator (Classes 1–4)
Louisiana Class 1 Water Treatment Practice Test
Louisiana's entry treatment class, for systems serving under 1,000 people. One qualification point (a year of experience), the state-written exam at 70, $5 at the door. Exams are strictly sequential: Class 1 first, always.
LDH · Class 2Louisiana Class 2 Water Treatment Practice Test
Class 2 covers systems serving 1,001 to 5,000. Two points, which can be experience alone. You can test at most one class above your current qualification.
LDH · Class 3Louisiana Class 3 Water Treatment Practice Test
Class 3 covers systems of 5,001 to 25,000. Five points with at least a quarter from education, and you must complete an approved Class 3-4 level training course before you can sit this exam.
LDH · Class 4 (highest)Louisiana Class 4 Water Treatment Practice Test
Louisiana's highest treatment class, for systems over 25,000. Eight points (no more than three-quarters from experience or education alone), the Class 3-4 course requirement, and sequential passage through every class below.
Water Production Operator (Louisiana's own category)
Louisiana Water Production Classes 1-2 Practice Test
Water Production is Louisiana's own category, required at every public water system including groundwater systems with simple disinfection. This bank is built to LDH's official Need-to-Know for the category: wells and intakes, source water, pump basics, disinfection and chlorine safety, storage, cross-connections, and entry-level math.
LDH · Production 3-4Louisiana Water Production Classes 3-4 Practice Test
The upper production classes, built to LDH's Need-to-Know: pump curves and horsepower, well drawdown, SCADA, water hammer, preventive maintenance, sanitary surveys, and pumping math. An approved Class 3-4 course is required before testing.
Louisiana wastewater practice tests
Louisiana wastewater treatment runs Classes 1 through 4 by population served (4 highest) on strictly sequential, Louisiana-written exams with a points-based qualification system. Every application includes a Certification Law and Rules exam.
Louisiana Class 1 Wastewater Practice Test
Louisiana's entry wastewater treatment class (systems under 1,000 served). One point, the state-written exam at 70, and the Certification Law and Rules exam that accompanies every application.
LDH · Class 2Louisiana Class 2 Wastewater Practice Test
Class 2 covers systems of 1,001 to 5,000. Two points, experience alone qualifies, 90-day wait after a failed attempt.
LDH · Class 3Louisiana Class 3 Wastewater Practice Test
Class 3 covers systems of 5,001 to 25,000. Five points with education required, plus an approved Class 3-4 training course before the exam.
LDH · Class 4 (highest)Louisiana Class 4 Wastewater Practice Test
Louisiana's highest wastewater class, over 25,000 served: eight points, the course requirement, and sequential passage from Class 1 up.
Louisiana licenses distribution operators in Classes 1 through 4 by population served, on sequential state-written exams at 70 ($5 per exam). Classes 3 and 4 require an approved upper-level training course before testing.
Louisiana Class 1 Distribution Practice Test
Louisiana's entry distribution class (systems under 1,000). One point, sequential state-written exams at 70, $5 each.
LDH · Class 2Louisiana Class 2 Distribution Practice Test
Class 2 distribution: systems of 1,001 to 5,000. Two points, experience alone qualifies.
LDH · Class 3Louisiana Class 3 Distribution Practice Test
Class 3 distribution: systems of 5,001 to 25,000. Five points including education, plus the Class 3-4 course before testing.
LDH · Class 4 (highest)Louisiana Class 4 Distribution Practice Test
Louisiana's highest distribution class, for systems over 25,000. Eight points and sequential passage through the ladder.
Louisiana licenses collection operators in Classes 1 through 4 covering the sewerage system outside the plant, on the same sequential points-based ladder as every other category.
Louisiana Class 1 Collection Practice Test
Louisiana licenses collection operators in Classes 1 through 4 covering everything in the sewerage system except the plant. Class 1: one point, sequential state exams.
LDH · Class 2Louisiana Class 2 Collection Practice Test
Class 2 collection: systems of 1,001 to 5,000 served. Two points.
LDH · Class 3Louisiana Class 3 Collection Practice Test
Class 3 collection: five points including education, plus the Class 3-4 course requirement.
LDH · Class 4 (highest)Louisiana Class 4 Collection Practice Test
Louisiana's highest collection class: eight points and the full sequential ladder.
About the Louisiana operator exams
Operator certification in Louisiana covers several disciplines, drinking water, wastewater, distribution, and collections, which may be handled by the same agency or by separate programs (drinking water is administered by Louisiana Department of Health, Water & Wastewater Operator Certification Program). The exact certification structure, exam format, levels, and continuing-education requirements vary by discipline and change over time, so always confirm the current scope and eligibility directly with the certifying agency. Our practice content focuses on the underlying technical material: the same operating principles, math, regulations, and process knowledge that show up on water and wastewater operator exams nationwide.
Frequently asked questions
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Disclaimer: WaterOperatorPracticeTest.com is an independent study aid. We are not affiliated with Louisiana Department of Health, Water & Wastewater Operator Certification Program or any state primacy agency. Always confirm current exam requirements with your state's certification body.