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Phone: 913-715-8500

11811 S. Sunset Drive, Suite 2500, Olathe, Kansas 66061

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About Us: Johnson County Wastewater Treatment Plant Tours

The water’s fine — once we’re finished with it!

Come on – admit it. Aren’t you the least bit curious about what happens when you flush? You might be surprised to learn the science behind cleaning the water before we return it to our streams.

Johnson County Wastewater (JCW) is big business.

  • Above ground, there are more than 5,500 assets at six treatment plants and 30 pump stations
  • Underground assets are even bigger, including more than 2,200 miles of pipe, and 55,000 manholes with an estimated replacement value of $1.7 billion.
  • The wastewater treatment processes use a complex mix of chemical, mechanical, and microbiological processes.

Intrigued? Come hear from our experts and tour a wastewater treatment plant. Employees who operate and manage the plants will show you step by step how we clean used water.

To request a tour, please complete our online form.


  • Tours are free and generally last 60 to 90 minutes.
  • We prefer groups of five or more. Groups of more than 20 may be split into two groups.
  • There’s no minimum age for participants, but groups with several young children will need more adults to help supervise them.
  • Participants should wear appropriate footwear, closed-toe shoes with flat heels.

Please provide us with as much advanced notice as possible.

Plants are located throughout the county, and we’ll work with you to choose a location for your tour.

  • Airport Plant (NCAC)
    50 Leawood Drive, New Century, KS 66031
  • Blue River Main
    2523 West 151st Street, Overland Park, KS 66224
  • Douglas L. Smith Middle Basin Plant
    10001 College Blvd., Overland Park, KS 66210
  • Mill Creek Regional
    20001 West 47th Street, Shawnee, KS 66218
  • Nelson Complex
    4800 Nall Avenue, Mission, KS 66202
  • Tomahawk Creek
    10701 Lee Boulevard, Leawood, KS 66211

Please complete our facility tour release of liability form before your tour.

Wastewater staff members are also available to visit your location to discuss the wastewater treatment process and other related topics. Please fill out our online form to request a speaker.