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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A free account saves every score across devices and shows you which New Mexico exam topics are pulling you down — so you know exactly where to focus next.
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Choose your certification
How New Mexico classifies drinking-water operators
New Mexico (NMED UOCP) administers 11 types of drinking-water professional certifications.
Full breakdown in the FAQ below.
Choose your certification level
Level 1 — Small Systems Operator → WS1 (Water Supply Level 1)
Entry-level certification. Small system operation, basic sampling, terminology, and maintenance.
IntermediateLevel 2 — Intermediate Operator → WS2
Intermediate-level exam prep. Treatment processes, operator math, regulations, troubleshooting.
AdvancedLevel 3 — Advanced Operator → WS3
Advanced-level certification. Process control, optimization, compliance for medium/large systems.
ExpertLevel 4 — Expert / Large System Operator → WS4
Highest-level certification. Plant management, complex treatment trains, large-utility regulations.
Practice by topic
Drill the specific subject areas on the New Mexico drinking-water exam.
New Mexico certifies wastewater treatment operators separately from drinking-water operators. The cards below map our four wastewater practice tests to New Mexico's wastewater class names.
Class I → Class 1
Entry-level wastewater operator. Wastewater characteristics, collection systems, preliminary/primary treatment, activated-sludge basics, disinfection, solids handling, lab work, and operator math.
New Mexico wastewaterClass II → Class 2
Intermediate wastewater operator. Secondary treatment, process control, troubleshooting, regulations, and two-step operator math.
New Mexico wastewaterClass III → Class 3
Advanced wastewater operator. Process optimization, nutrient removal, biosolids handling, lab analyses, and compliance for medium and large plants.
New Mexico wastewaterClass IV → Class 4
Expert wastewater operator. Plant management, complex treatment trains, advanced nutrient removal, and large-utility regulations.
Distribution operator practice tests for New Mexico are coming soon. In the meantime, see the Distribution hub to get notified, or start with drinking water or wastewater — they share a lot of the same operator math and fundamentals.
Collections operator practice tests for New Mexico are coming soon. In the meantime, see the Collections hub to get notified, or start with drinking water or wastewater — they share a lot of the same operator math and fundamentals.
About the New Mexico operator exams
Water operator certification in New Mexico is administered by NMED (New Mexico Environment Department) — Utility Operator Certification Program (UOCP), Drinking Water Bureau. The exact certification structure, exam format, and continuing-education requirements vary and change over time, so always confirm the current scope and eligibility directly with the agency. Our practice content focuses on the underlying technical material — the same operating principles, math, regulations, and treatment chemistry that show up on virtually every US drinking-water operator exam.
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 (UOCP), Drinking Water Bureau or any state primacy agency. Always confirm current exam requirements with your state's certification body.