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Septic services in St. Louis, MO

30 license-verified septic pros serve the St. Louis area. Pumping typically runs $250 to $1,250; new systems $3,600 to $12,500.

  • Checked against Missouri licensing records
  • Verification date on every listing
  • Closed businesses auto-removed

Septic pros serving St. Louis

Are you a septic company near St. Louis city County? One sponsor per county, clearly labelled. Sponsor this county

Mr. Rooter

70/100
✓ MO License Verified #39419 ★ 4.8 (2276 reviews) Septic Tank PumpingSeptic System InstallationSeptic Repair

Fenton, MO · 13 mi from St. Louis

Call (314) 665-2157 Details Website

Verified Oct 2026 · Unclaimed listing

Bi-State Utilities Co.

60/100
✓ MO License Verified #33719 ★ 3.7 (6 reviews) Septic System InstallationSeptic RepairAerobic System Service

St. Charles, MO · 14 mi from St. Louis

Call (314) 209-0202 Details

Verified Oct 2026 · Unclaimed listing

Show Me Soils

70/100
⚠ MO registration lapsed ★ 4.9 (323 reviews) Septic Tank PumpingSeptic System InstallationSeptic RepairAerobic System Service

Lonedell, MO · 39 mi from St. Louis

Call (636) 629-1788 Details Website

Verified Oct 2026 · Unclaimed listing

Dig-It-Inc.

45/100
✓ MO License Verified #31126 Septic System InstallationSeptic RepairAerobic System Service

Dittmer, MO · 37 mi from St. Louis

Call (314) 560-4679 Details

Verified Oct 2026 · Unclaimed listing

M Turpin Services LLC

70/100
⚠ MO registration lapsed ★ 4.4 (28 reviews) Septic Tank PumpingSeptic System InstallationSeptic RepairAerobic System Service

Foristell, MO · 43 mi from St. Louis

Call (636) 262-6230 Details Website

Verified Oct 2026 · Unclaimed listing

Trinity Ditching LLC

70/100
⚠ MO registration lapsed ★ 4.6 (16 reviews) Septic Tank PumpingSeptic System InstallationSeptic RepairAerobic System Service

Troy, MO · 44 mi from St. Louis

Call (636) 462-2084 Details Website

Verified Oct 2026 · Unclaimed listing

Chapman Contracting

60/100
✓ MO License Verified #32521 ★ 4.2 (5 reviews) Septic Tank PumpingSeptic System InstallationSeptic RepairAerobic System Service

Saint Clair, MO · 46 mi from St. Louis

Call (636) 629-7854 Details

Verified Oct 2026 · Unclaimed listing

Browse by service in St. Louis

Permits in St. Louis city County

A new system or a repair needs a permit before anyone digs, and St. Louis sits in St. Louis city County. Who issues it, what it costs and which soil work comes first: Missouri septic permit guide.

Septic rules that apply in St. Louis

  • Permits. A construction permit is required before installing a system or making a major modification or major repair, except on single-family residential lots of three acres or more (and certain lots of ten acres or more) where every part of the system is more than 10 feet from any adjoining property line and no effluent reaches a neighbor's property or pollutes water; some counties do not honor that exemption. Source.
  • Selling a home. Missouri law does not require a septic inspection or evaluation before a home is sold, but if a lender or buyer asks for one it must be done by a DHSS-licensed inspector or evaluator, and some counties require one on every sale. Source.
  • Aerobic systems. Missouri treats aerobic treatment units as basic systems that must meet NSF Standard 40, have at least 120 gallons per bedroom per day (minimum 500 gallons) of capacity, and discharge to a full-size soil absorption system. Source.
  • Tank size. A 3-bedroom house in Missouri needs a tank of at least 1,000 gallons. Sizes by bedrooms.

Every Missouri septic rule, in plain English · How often to pump · Finding your tank · Septic tank maintenance

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Septic questions in St. Louis

Do you need a septic inspection to sell a house in St. Louis?

Missouri law does not require a septic inspection or evaluation before a home is sold, but if a lender or buyer asks for one it must be done by a DHSS-licensed inspector or evaluator, and some counties require one on every sale.

What size septic tank does a 3-bedroom house in Missouri need?

At least 1,000 gallons, the minimum in Missouri's onsite wastewater rule. Larger homes need more; see the full table by bedrooms.

How much does septic tank pumping cost in St. Louis?

Nationally, septic pumping runs $250 to $1,250 with an average around $427 (HomeGuide, 2026). Rural Missouri markets typically land toward the middle of that range. Tank size, accessibility, and time since last pump-out drive the price.

How often should a septic tank be pumped?

Every 3 to 5 years for most households, per EPA guidance. Larger households, garbage disposals, or smaller tanks shorten the interval. Set a free reminder on SepticNear so it never slips.

Are these companies licensed?

Listings marked "License Verified" were matched to Missouri's state licensing records, and we show the date each listing was last checked. Lapsed or unverifiable businesses are removed automatically.

Cost sources: HomeGuide 2026 · Full cost guide

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