Studying for a New Mexico water or wastewater operator exam? You're in the right place. Pick your discipline below: each tab has the certification levels, how New Mexico names them, and the practice tests that match.
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Choose your certification
How New Mexico classifies drinking-water operators
New Mexico runs everything through one program: the NMED Utility Operator Certification Program, under a single regulation, 20.7.4 NMAC.
Full breakdown in the FAQ below.
Choose your New Mexico certification
Water Supply Operator (Small Water, then Levels 1 through 4)
New Mexico Small Water, Operator Practice Test
The Small Water tier sits below Level 1 and covers New Mexico's smallest drinking water systems.
NMED · Level 1 (entry)New Mexico Water Supply Level 1, Practice Test
Level 1 is the entry Water Supply certification. New Mexico counts upward, so Level 4 is the top.
NMED · Level 2New Mexico Water Supply Level 2, Practice Test
Level 2 covers treatment and supply at a working-operator level.
NMED · Level 3New Mexico Water Supply Level 3, Practice Test
Level 3 moves into more complex treatment and larger supply systems.
NMED · Level 4 (highest)New Mexico Water Supply Level 4, Practice Test
Level 4 is New Mexico's highest Water Supply certification, and the only drinking water ladder that runs all the way to 4.
New Mexico wastewater practice tests
Wastewater in New Mexico is certified by the same NMED Utility Operator Certification Program as drinking water, under 20.7.4 NMAC, and administratively it lives inside the Drinking Water Bureau. Treatment runs Levels 1 through 4 with 4 the highest, and a Small Wastewater tier sits below for the smallest facilities. Collection is a separate and much shorter ladder of just Levels 1 and 2, covered under Collections. New Mexico also issues laboratory technician and water sampling credentials, which are standalone certifications rather than steps on the operator ladder.
New Mexico Wastewater Level 1, Practice Test
Level 1 is the entry wastewater certification. Note that despite being wastewater, it is administered by NMED's Drinking Water Bureau.
NMED · Level 2New Mexico Wastewater Level 2, Practice Test
Level 2 covers conventional secondary treatment and routine process control.
NMED · Level 3New Mexico Wastewater Level 3, Practice Test
Level 3 moves into advanced biological treatment, nutrient removal and solids handling.
NMED · Level 4 (highest)New Mexico Wastewater Level 4, Practice Test
Level 4 is New Mexico's highest wastewater certification, for the largest and most complex facilities.
Distribution is its own certification in New Mexico, and it is worth knowing that it only runs to Level 3. Unlike Water Supply, which goes to Level 4, there is no Distribution 4, so Level 3 is the top of this ladder. A Small Water tier sits below Level 1 for the smallest systems. Distribution is certified under the same regulation and the same NMED program as everything else, 20.7.4 NMAC.
New Mexico Distribution Level 1, Practice Test
Entry distribution certification: mains, valves, hydrants, storage and safety basics.
NMED · Level 2New Mexico Distribution Level 2, Practice Test
Main disinfection, flushing, cross-connection control and pressure management.
NMED · Level 3 (highest)New Mexico Distribution Level 3, Practice Test
Level 3 is the top of New Mexico's distribution ladder: hydraulics, pumping and storage operation, and distribution system water quality across the largest networks.
Collection is a real NMED certification, but it is the shortest ladder in the state: it runs Level 1 and Level 2 only. There is no Collection 3 or 4, so Level 2 is the top. It is certified under the same 20.7.4 NMAC regulation as the rest of the program, through the Drinking Water Bureau.
New Mexico Collection Level 1, Practice Test
Entry collection certification: pipe, manholes, basic maintenance, confined space awareness and lift station fundamentals.
NMED · Level 2 (highest)New Mexico Collection Level 2, Practice Test
Level 2 is the top of New Mexico's collection ladder: cleaning and inspection, pump station operation, infiltration and inflow, overflow response, and force main work.
About the New Mexico operator exams
Operator certification in New Mexico 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 NMED (New Mexico Environment Department): Utility Operator Certification Program, Drinking Water Bureau (covers wastewater too, under 20.7.4 NMAC)). 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 New Mexico classify water operators?
Are these the exact questions on the New Mexico exam?
Are these practice tests free?
Disclaimer: WaterOperatorPracticeTest.com is an independent study aid. We are not affiliated with NMED (New Mexico Environment Department): Utility Operator Certification Program, Drinking Water Bureau (covers wastewater too, under 20.7.4 NMAC) or any state primacy agency. Always confirm current exam requirements with your state's certification body.