MISSOURI SMALLFLOWS ORGANIZATION
Advancing Education & Excellence in Onsite Wastewater
Dedicated to providing training, resources, and support for wastewater professionals across Missouri.
From continuing education classes to our annual conference, MSO is your hub for growth, connection, and innovation in the onsite wastewater industry.
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Upcoming Events
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Check it out!
Wastewater Workshop for Homeowners on May 21
On Thursday, May 21 at 5:30 PM, take an educational walking tour of the Onsite Wastewater Training Center to learn how septic systems work. FREE EVENT! Hosted by the Watershed Center at 2400 E Valley Water Mill Road. RSVP is encouraged – call 417-408-3310 if you are interested. Little Sac watershed landowners are eligible to receive a $60 rebate on a pump-out for their septic system!
Who We Are
Missouri Smallflows Organization (MSO) is a non-profit organization committed to strengthening Missouri’s onsite wastewater industry through continuing education, industry collaboration, and advocacy.
Who We Serve
Installers
Onsite Soil Evaluators
Environmental Health Professionals
Inspectors
Engineers
MSO's Mission and Impact
Missouri Smallflows Organization (MSO) is a non-profit association committed to advancing the education, regulation, and implementation of onsite and small-scale wastewater systems across the state.
CONTINUING EDUCATION AT THE CORE
Education is the foundation of MSO.
We offer state-approved CEU classes throughout Missouri, online and in person, to keep professionals current with technologies, codes, and best practices.
LATEST ANNOUNCEMENTS
Fall Soils Seminar Registration is Now Open!
Join industry leaders, network with peers, and explore the latest tech in onsite systems.
Check out registration for the 2026 MSO Conference & Trade Show! Don’t miss this once-a-year event.
ANNUAL CONFERENCE & TRADE SHOW
Our signature event brings the Missouri wastewater community together!
- Technology demos
- Expert sessions
- Networking opportunities
HOMEOWNERS: NEED A LOCAL SEPTIC PRO?
Use the Septic Locator tool powered by our national partner, NOWRA, to find trusted professionals near you.
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Mailing Address: 2733 E. Battlefield #132, Springfield, MO 65804
417-631-4027
contact@mosmallflows.org