Studying for a Tennessee water or wastewater operator exam? You're in the right place. Pick your discipline below: each tab has the certification levels, how Tennessee names them, and the practice tests that match.
Track your progress on the Tennessee exam prep
A free account keeps every score on your phone and computer, so you can watch your Tennessee exam prep scores climb attempt by attempt.
Welcome back. Your Tennessee test scores are saved to your account, view your history →
Choose your certification
How Tennessee classifies drinking-water operators
Tennessee runs everything through a single Water and Wastewater Operators Board of Certification inside TDEC's Division of Water Resources, and the Fleming Training Center in Murfreesboro is the hub for all of it: the training, the exams and the recordkeeping for more…
Full breakdown in the FAQ below.
Choose your Tennessee certification
Water Treatment (Small Water System, then Grades I through IV)
Tennessee Small Water System, Practice Test
The Small Water System class sits below Grade I and is Tennessee's entry point for the smallest treatment systems.
TDEC · Grade I (entry)Tennessee Grade I, Water Treatment Practice Test
Grade I is the first full water treatment grade. Tennessee counts upward, so Grade IV is the highest.
TDEC · Grade IITennessee Grade II, Water Treatment Practice Test
Grade II covers treatment at a working-operator level. Note this is also the ceiling on the distribution ladder, though the two are separate certifications.
TDEC · Grade IIITennessee Grade III, Water Treatment Practice Test
Grade III covers more complex treatment and larger systems. Treatment is the only drinking-water ladder that goes beyond Grade II.
TDEC · Grade IV (highest)Tennessee Grade IV, Water Treatment Practice Test
Grade IV is Tennessee's highest water treatment grade, for the largest and most complex plants in the state.
Tennessee wastewater practice tests
Wastewater in Tennessee is certified by the same board as drinking water, the Water and Wastewater Operators Board of Certification within TDEC's Division of Water Resources. Treatment runs Grades I through IV with IV the highest, and alongside them sits a Biological and Natural System class covering lagoons and natural treatment rather than mechanical plants. Collection is a separate certification and a much shorter one: it stops at Grade II, covered under Collections. That asymmetry is the thing to plan around, because a collection operator who wants to keep climbing has to cross into treatment. All training, examinations and recordkeeping run through the Fleming Training Center in Murfreesboro, and the pass mark is 70 percent.
Wastewater Treatment (Grades I through IV)
Tennessee Grade I, Wastewater Practice Test
Grade I is the entry wastewater treatment grade. Unlike collection, which stops at Grade II, the treatment ladder runs all the way to Grade IV.
TDEC · Grade IITennessee Grade II, Wastewater Practice Test
Grade II covers conventional secondary treatment and routine process control.
TDEC · Grade IIITennessee Grade III, Wastewater Practice Test
Grade III moves into advanced biological treatment, nutrient removal and solids handling.
TDEC · Grade IV (highest)Tennessee Grade IV, Wastewater Practice Test
Grade IV is Tennessee's highest wastewater treatment grade, for the largest and most complex facilities.
Biological and Natural Systems (a separate class)
Water distribution in Tennessee stops at Grade II. There is no Grade III or Grade IV on this ladder, which surprises operators coming from states where distribution runs four deep. Grade I and Grade II are the whole set, and if you want to certify beyond that you move into water treatment, which runs a Small Water System class plus Grades I through IV. Distribution is a separate certification from treatment, so an operator running a plant and its mains holds one on each ladder. Training and examinations both go through the Fleming Training Center in Murfreesboro, and the pass mark is 70 percent.
Tennessee Grade I, Water Distribution Practice Test
Grade I is the entry distribution certification: mains, valves, hydrants, storage and safety basics.
TDEC · Grade II (highest on this ladder)Tennessee Grade II, Water Distribution Practice Test
Grade II is the top of Tennessee's distribution ladder: main disinfection, flushing, cross-connection control, pressure management, hydraulics, pumping and storage. There is nothing above it on the distribution side.
Wastewater collection in Tennessee also stops at Grade II, exactly like water distribution. There is no Grade III or IV, so Grade I and Grade II are the entire collection ladder. Anyone looking to certify further moves into wastewater treatment, which carries Grades I through IV plus a Biological and Natural System class. Collection is certified by the same single Water and Wastewater Operators Board of Certification that handles every other Tennessee credential, with training and exams at the Fleming Training Center.
Tennessee Grade I, Collection System Practice Test
Grade I is the entry collection certification: pipe, manholes, basic maintenance, safety and confined space awareness.
TDEC · Grade II (highest on this ladder)Tennessee Grade II, Collection System Practice Test
Grade II is the top of Tennessee's collection ladder: cleaning and inspection, lift station operation, infiltration and inflow, overflow response, force mains and pump station hydraulics.
About the Tennessee operator exams
Operator certification in Tennessee 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 TDEC Division of Water Resources: Water and Wastewater Operators Board of Certification, with training and exams at the Fleming Training Center, Murfreesboro). 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
How does Tennessee classify water operators?
Are these the exact questions on the Tennessee exam?
Are these practice tests free?
Disclaimer: WaterOperatorPracticeTest.com is an independent study aid. We are not affiliated with TDEC Division of Water Resources: Water and Wastewater Operators Board of Certification, with training and exams at the Fleming Training Center, Murfreesboro or any state primacy agency. Always confirm current exam requirements with your state's certification body.