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Reach water and wastewater operators while they study

Put your water or wastewater business in front of thousands of operators preparing for their certification exams, from first-time Class 1 candidates to Class 4 plant operators. Equipment, chemicals, services, software, training, events or job openings: if operators use it, this is the place to show it.

Last 30 days, from Google Analytics and site data (October 2026).

Where your ad appears

Two spots, sold together or separately, on the practice tests, study guides and state pages:

• Desktop sidebar. Your ad sits beside the questions while operators work through them. About 44% of visitors study on a desktop or laptop, and those sessions average over 12 minutes.
• Mobile bottom bar. Your ad stays pinned to the bottom of the screen as operators scroll through questions on their phones, where the other 56% of visitors study.

On desktop: the sidebar

On phones: the bottom bar

Plus the monthly email

Every sponsor, on either spot, is also featured in our monthly email to 2,000+ operators who signed up for study help, so your message reaches them in their inbox, too, on phone or desktop.

Who advertises here

• Equipment, chemical and parts suppliers. Put your products in front of the people who run the plants and systems.
• Engineering, lab and service companies. Reach the operators and managers who call you when something needs fixing, testing or upgrading.
• Software and SCADA providers. Show operators the tools that make their shift easier.
• Training providers, schools and associations. Meet operators at the moment they are studying, and promote courses, conferences and events.
• Utilities and contract operators that are hiring. Reach licensed operators and the people working toward their next license.

About the audience

WaterOperatorPracticeTest.com has free practice tests for drinking water treatment, wastewater treatment, distribution and collections, at every certification level, with state pages for all 50 states. It is listed as an exam prep resource by the Montana DEQ and the Tennessee Department of Environment & Conservation, and it is built and run by a licensed water operator.