This list includes Licensed Onsite System Inspectors/Evaluators who are authorized to inspect or evaluate onsite wastewater treatments systems (OWTS) for real estate transactions. Individuals are not licensed to perform regulatory functions, such as inspecting installation or repairs when an onsite system construction permit or a building permit is needed.

There may be additional requirements to work in some counties. Contact the county onsite sewage authority to confirm that an individual is authorized to inspect/evaluate onsite systems for real estate transactions in that county.

A Licensed Evaluator (EVAL) can only perform evaluations. A Licensed Inspector (INSP) can perform both inspections and evaluations. More information is available about inspections and evaluations.

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Licensed Inspectors/Evaluators List

Last Name First Name MI Date of Expiration Business Address City State Zip Code Business Phone Counties Served
Manes John M 9/30/2019 Cornerstone Property inspections PO Box 51 Republic MO 65738 (417) 209-4321 Greene, Stone, Lawrence, Christian, Taney
Manton Robert H 6/30/2018 Advanced Inspection Services 15087 State Road A Richland MO 65556 (573) 216-1312 Camden Miller Morgan Pulaski Laclede
Martin R. Dale
3/31/2018 Onsite Wastewater PO Box 354 Devils Elbow MO 65457 (573) 842-7328 Miller, Camden, Maries, Pulaski
Mason Dennis L 6/30/2020 O & M Enterprises, Inc. 900 S Vine Street Holden MO 64040 (816) 732-4313 Cass, Pettis, Henry, Lafayette, Johnson,Jackson
Mattingly Christopher C 6/30/2020 Accurate Well & Septic 160 Stabel Ridge Drive Troy MO 63379 (636) 262-1303 St Louis St Charles Warren Jefferson
Mayhan Bryan D 6/30/2019 Bryan D Mayhan 1311 Robert Ray Columbia MO 65202 (573) 268-6482 Callaway Randolph Howard Cooper
McCleary Jeffery M 7/31/2020 Village of Four Seasons 133 Cherokee Rd Four Seasons MO 65049 (573) 280-3258 Camdon, Miller
McClernon Robert B 1/31/2019 Extra Mile Home Insp. Serv. 2061 W Union Chapel Rd Nixa MO 65701 (417) 619-7098 Christian Greene Taney Lawrence Stone
McCullough Michael H 6/30/2018 Mike's Indepent Realty 33 Joy Land Rd Shell Knob MO 65747 (417) 342-9782 Barry Stone Taney Lawrence
McGuire Lawrence R 3/31/2020 McGuire's Home Inspections LLC 1109 Maritime Lane Roach MO 65787 (573) 836-3188 Camden, Miller, Morgan
Mefford David L 6/30/2020 Lake Ozark Real Estate Inspection 2545 Bagnell Dam Blvd Lake Ozark MO 65049 (573) 693-9328 Pettis Saline Benton Johnson Morgan Henry Lafayette Boone
Menne Bernard (Butch) E 10/31/2020 B & J Septic Systems 755 Mary Jo Road Silex MO 63377 (573) 384-5536 Warren, Pike, Montgomery, Lincoln, Ralls, Marion, Monroe
Mertensmeyer Roger
21900 S. Mt. Pleasant Road Hartsburg MO 65039 (573) 864-5549 Callaway Cole Cooper Howard Boone
Miller Mathias K 3/31/2019 Miller Septic Service 2419 McMahan Rd Niangua MO 65713 (417) 630-1168 Laclede Webster Pulaski Dallas Wright
Minderman Nick L 11/30/2017 7 Oaks Home Inspections 16995 State HWY M Warren MO 63383 (636) 456-0001 Warren Jefferson Linclon St. Charles
Minor Everett L 6/30/2019 Everett L. Minor PO Box 30096 Columbia MO 65205 (816) 918-8974 Boone
Mohn Jr Melvin H 6/30/2020 The Mohn Team DBA The Brickkicker 1302 Norwood Hills Dr. O'Fallon MO 63366 (636) 344-0435 St. Charles, Warren, Lincoln, Franklin,
Monroe Michael D 10/31/2020 On Site LLC PO Box 307 Nixa MO 65714 (417) 880-7062 Greene Christian Taney Stone Lawrence Polk Hickory Webster Dallas Laclede Dade
Morgan Carol A 6/30/2018 MWE Excavating LLC PO Box 2 Sweet Gum Rd 708 Zalma MO 63687 (573) 722-6333 Bollinger, Cape Girardeau, Scott, Stoddard, Butler, Wayne, Madison, Iron
Morris John R 3/31/2019 Maynard 848 Maynard Rd. Nixa MO 65714 (417) 230-1772 Christian, Greene, Stone, Taney, Barry, Polk
Murphy Brenden R 3/31/2019 Show Me Soils 981 North Service Rd. West St. Clair MO 63077 (636) 629-1788 Franklin, Jefferson, St. Louis, St. Charles, Franklin
Myers Michael E 7/31/2020 Central Missouri Building Inspections 32100 Ginger Rd Gravois Mills MO 65037 (573) 964-5888 Morgan, Camden, Miller, Pettis, Clay, Jackson, Clinton, Osage
Myers Timothy W 9/30/2019 A-1 Onsite Inspections LLC 13760 HWY JJ Desoto MO 63020 (314) 578-7198 St Francois, Ste Genevieve, Jefferson, Washington, Madison
Needy Douglas E 3/31/2019 Needy Custom Contracting Inc 29300 HWY 127 Green Ridge MO 65332 (660) 221-5200 Pettis, Johnson, Saline, Benton, Henry, Morgan
Needy Wendy Beth 6/30/2019
29300 HWY 127 Greenridge MO 65335 (573) 280-3947 Morgan, Benton, Moniteau, Henry


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Contact us if you have questions about this list, or to update or correct an address.