​The exam is open book, and the passing score is 70%.  Please visit the Trades Examination Information page for additional exam information and dates.

The exam will cover information contained in the following:

• Wis. Admin. Code § SPS 381 - Definitions
• Wis. Admin. Code § SPS 382 - General Plumbing
• Wis. Admin. Code § SPS 384 - Plumbing Products
• Wis. Admin. Code § SPS 385 - Soil and Site Evaluations
• Wis. Admin. Code § SPS 305 - Plumbing Credentials
• Wis. Admin. Code § SPS 316 - Proper Plumbing Connections

Please Note: A thorough knowledge of the electrical code is not required. However, there are a few issues associated with proper electrical connections to pumps and other components.

The major chapters associated with the POWTS exam are based off of the plumbing code, (381-387) below are the most helpful:

• Private Onsite Wastewater Treatment Systems Code
• Chapter 383
• POWTS Component Manuals
• Chapter 145 of the WI. State Statutes, (Plumbing, Fire and Swimming Pools) 

Copies of Wisconsin Administrative Codes may be printed from the Wisconsin State Legislature site or obtained from Document Sales online or by calling (608) 243-2441 or (800) 362-7253.  International model codes and accessibility standards can be obtained from the International Code Council (ICC) or by calling (800) 786-4452.  When there is a change to Wisconsin codes, exams will cover the new codes three months after the effective date.