The essential overseers of our communities.

Tens of thousands of men and women across the nation work every day to provide and maintain the infrastructure and services collectively known as public works. When you travel on a city street,Illustration of city take a stroll on a sidewalk, place trash and recycling at the curb, or picnic in a park, you are benefiting from the hard work of your department of public works. The overseers of many important aspects of our lives, our communities could not survive without them.

Wastewater Treatment Tests

ENTRY-LEVELWastewater Treatment Operator

Wastewater Treatment Operator (WTO) Assess whether a candidate has the most basic abilities necessary to perform the duties required to maintain the public’s health and the health of our water supplies. No specific plant knowledge is required.

What is a TIP? And why is it important? The WTO-EL 201 test includes a TIP, which stands for Test Information Packet. TIPs are an essential, timed part of the tests they accompany, and were designed to assess candidates’ ability to learn, remember and apply new information. The TIP materials on this test are all written, e.g., articles and facts related to wastewater treatment. TIPs are distributed and collected (after a study period of 25 minutes) prior to handing out the test booklets.


One of the most common forms of pollution control in the United States is wastewater treatment. The supervisors of these plants assist in the oversight of all wastewater treatment operations. As stewards of the facilities that safeguard the public’s health and the health of our water supplies, these first-line supervisors are critical members of our communities.

Wastewater Treatment First-line Supervisor (WTS-FLS) Receive the essential information needed to help ensure only the most highly qualified candidates with the greatest leadership potential are promoted in your facility.