Certification discipline
Collection Systems Operator Certification
Collection system operators maintain the sewers, manholes, and lift stations that carry wastewater to the treatment plant. The exam covers pipe maintenance, inflow and infiltration, confined space entry, and lift station operation.
Choose your grade
Free practice questions →Certification is typically organized into grades or classes of increasing responsibility and system complexity. The names and exact requirements for each level vary by state — some states use numbers, others use letters (Class A–D) or other designations. Pick a grade below for exam details, or find your state’s terminology on its certification page.
Grade 1
Entry
Entry-level certification for operators at small systems or working under direct supervision.
Grade 2
Intermediate
Intermediate certification for operators running day-to-day operations at small to mid-size systems.
Grade 3
Advanced
Advanced certification for shift leads and operators at larger systems with complex processes.
Grade 4
Expert
Highest certification for chief operators and superintendents at the largest, most complex systems.
What the exam covers
- Gravity sewer design and maintenance
- Lift stations and force mains
- Inflow and infiltration (I&I)
- Sewer cleaning and CCTV inspection
- Manhole rehabilitation
- Confined space entry and safety
- Odor and corrosion control
- Sanitary sewer overflow (SSO) response
The math on the Collection Systems exam
These calculations are commonly included in collection systems operator exam preparation and may appear on your exam depending on your certification level and state. Practicing them is one of the most effective ways to prepare.
- Pipe slope and velocity
- Wet well volume and pump cycle time
- Flow rate (Manning's equation basics)
- Pump horsepower
- Force main detention time
- Infiltration rate (gpd per inch-mile)
Frequently asked questions
- What is on the collection systems operator exam?
- Collection Systems exams commonly cover gravity sewer design and maintenance, lift stations and force mains, inflow and infiltration (i&i), sewer cleaning and cctv inspection, and related topics, along with applied math such as pipe slope and velocity, wet well volume and pump cycle time, flow rate (manning's equation basics). Exact content, question count, and passing score are set by your state's certifying agency and exam vendor.
- Is operator certification the same in every state?
- No. Every state has its own certifying agency, exam vendor, grade or class names, and renewal rules, though most programs follow a similar four-level progression in substance. See your state's page for the specifics that apply to you.
- What math should I study for the collection systems exam?
- The math that comes up most for collection systems operators includes pipe slope and velocity, wet well volume and pump cycle time, flow rate (manning's equation basics), pump horsepower. Practicing these calculations is one of the most effective ways to prepare.
- What's the difference between collection systems and wastewater treatment certification?
- Collection Systems certification covers operators who maintain sewers and lift stations that convey wastewater. Wastewater Treatment certification covers operators who treat municipal and industrial wastewater before discharge. Some states require or offer both; check your state's requirements.
- Are these official certification exam questions?
- No. This is an independent study resource, not affiliated with any state agency or exam vendor. Practice questions and study content here are meant to supplement, not replace, your official exam preparation materials.
Content on this page is written and reviewed by our team; see our methodology for how it’s sourced, and your state’s certification page for state-specific requirements.