60/100CR Score
Ranked #1 because of its Google rating and trade focus: 5.0★ from 237 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Best Septic Service Companies in St. Louis, MO (2026)
74 septic service companies ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
The short answer
- 1
Best overall in St. Louis: Nolen Septic Services, CR Score 60/100; 5.0★ from 237 Google reviews; open 24/7.
- 3
Best for emergencies (open 24/7): Mr. Rooter Plumbing of St. Louis, posts 24/7 hours; ranked #3 of 74.
- 3
Most-reviewed: Mr. Rooter Plumbing of St. Louis, 2,141 Google reviews at 4.8★, the most of 74 ranked; ranked #3.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
74 St. Louis septic service companies are ranked here by CR Score, from ten published factors. 16 are open 24/7, 36 open Saturdays and 27 open Sundays, based on posted hours. The median Google rating is 4.7★ across 74 rated businesses.
Top 10 septic service companies in St. Louis at a glance
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Nolen Septic Services | 60 | 5.0★ (237) | Edwardsville, 18 mi away | 24/7 | Overall |
| 2 | Maplewood Plumbing & Sewer, LLC. | 58 | 4.8★ (1,691) | St. Louis | — | — |
| 3 | Mr. Rooter Plumbing of St. Louis | 58 | 4.8★ (2,141) | Ballwin, 15 mi away | 24/7 | Emergencies, Most reviews |
| 4 | Mitchell Environmental | 57 | 5.0★ (212) | Belleville, 11 mi away | — | — |
| 5 | River City Sewer& Drain, L.L.C. | 57 | 4.9★ (207) | Arnold, 15 mi away | 24/7 | — |
| 6 | DRD Environmental Septic System Design | 56 | 4.8★ (19) | St. Louis | Sat | — |
| 7 | Shults Septic Service, LLC | 56 | 5.0★ (15) | Belleville, 15 mi away | 24/7 | — |
| 8 | All Star Pumping & Sewer Services | 55 | 4.3★ (29) | St. Louis | 24/7 | — |
| 9 | Pierson Plumbing Sewer & Drain L.L.C | 55 | 4.8★ (169) | Saint Charles, 19 mi away | 24/7 | — |
| 10 | Nelson Plumbing & Sewer Services CO. | 55 | 4.6★ (14) | St. Louis | 24/7 | — |
The 74 best septic service companies in St. Louis, ranked
Ordered by CR Score, a 0–100 score from ten published factors. Paid placement never changes the order.
Based in St. Louis
58/100CR ScoreRanked #2 because of its Google rating and review volume: 4.8★ from 1,691 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Ballwin, 15 mi away
58/100CR ScoreRanked #3 because of its Google rating and review volume: 4.8★ from 2,141 Google reviews, the most in St. Louis.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Belleville, 11 mi away
57/100CR ScoreRanked #4 because of its Google rating and trade focus: 5.0★ from 212 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Arnold, 15 mi away
57/100CR ScoreRanked #5 because of its Google rating and trade focus: 4.9★ from 207 Google reviews, listed on Google as “Plumber”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in St. Louis
56/100CR ScoreRanked #6 because of its Google rating and trade focus: 4.8★ from 19 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Belleville, 15 mi away
56/100CR ScoreRanked #7 because of its Google rating and trade focus: 5.0★ from 15 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in St. Louis
55/100CR ScoreRanked #8 because of its Google rating and trade focus: 4.3★ from 29 Google reviews, listed on Google as “Plumber”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Saint Charles, 19 mi away
55/100CR ScoreRanked #9 because of its Google rating and trade focus: 4.8★ from 169 Google reviews, listed on Google as “Plumber”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in St. Louis
55/100CR ScoreRanked #10 because of its Google rating and trade focus: 4.6★ from 14 Google reviews, listed on Google as “Plumber”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in St. Louis
55/100CR ScoreRanked #11 because of its Google rating and trade focus: 4.8★ from 183 Google reviews, listed on Google as “Plumber”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in St. Louis
54/100CR ScoreRanked #12 because of its Google rating and trade focus: 4.7★ from 28 Google reviews, listed on Google as “Plumber”.
Based on 8 of 10 factors; credentials and recency not yet collected.
#13 V1 Environmental
Based in Collinsville, 14 mi away
54/100CR ScoreRanked #13 because of its Google rating and trade focus: 5.0★ from 84 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
#14 Superior Service
Based in Chesterfield, 23 mi away
54/100CR ScoreRanked #14 because of its Google rating and review volume: 4.9★ from 1,766 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Sappington, 11 mi away
53/100CR ScoreRanked #15 because of its Google rating and trade focus: 4.7★ from 23 Google reviews, listed on Google as “Plumber”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in St. Louis
53/100CR ScoreRanked #16 because of its Google rating and trade focus: 4.3★ from 3 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in St. Louis
53/100CR ScoreRanked #17 because of its Google rating and trade focus: 4.3★ from 15 Google reviews, listed on Google as “Plumber”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Godfrey, 19 mi away
53/100CR ScoreRanked #18 because of its Google rating and review volume: 4.9★ from 321 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in St. Louis
53/100CR ScoreRanked #19 because of its Google rating and trade focus: 4.1★ from 91 Google reviews, listed on Google as “Plumber”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
Based in St. Louis
53/100CR ScoreRanked #20 because of its Google rating and trade focus: 4.8★ from 8 Google reviews, listed on Google as “Plumber”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Saint Ann, 13 mi away
52/100CR ScoreRanked #21 because of its Google rating and trade focus: 4.0★ from 177 Google reviews, listed on Google as “Plumber”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in St. Louis
52/100CR ScoreRanked #22 because of its Google rating and trade focus: 5.0★ from 6 Google reviews, listed on Google as “Plumber”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Saint Peters, 24 mi away
52/100CR ScoreRanked #23 because of its Google rating and review volume: 4.8★ from 356 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in St. Louis
52/100CR ScoreRanked #24 because of its Google rating and trade focus: 2.3★ from 3 Google reviews, listed on Google as “Plumber”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Chesterfield, 24 mi away
52/100CR ScoreRanked #25 because of its Google rating and review volume: 4.8★ from 459 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Septic service companies ranked #26 to #50
#1 to #25 are shown in full above. Here are #26 to #50, in CR Score order; each links to its profile. We publish the top 50 of 74 ranked septic service companies here; the rest are on their profiles.
Also serving St. Louis
20 more septic service companies within 25 mi that we can't rank yet: too few reviews, or a trade we couldn't confirm. Listed A to Z.
| Business | Google rating | Distance |
|---|---|---|
| 3rd Generation Sewer Services | 3.0★ (2) | 14 mi |
| AMCON Services | 5.0★ (1) | In St. Louis |
| Biologix Products Group | 5.0★ (1) | In St. Louis |
| Burke Plumbing | 10 mi | |
| C C Drain & Sewer Cleaning Co | 12 mi | |
| City Home Services Llc (Septic & Sewer) | 1.0★ (1) | 21 mi |
| D-A-C Home Inspections | 5.0★ (1) | 14 mi |
| Drain Cleaning St Louis | 5.0★ (1) | 9 mi |
| E Plumbing and Sewer | 5.0★ (2) | 3 mi |
| Eco Septic Tank Pumping St Louis | 15 mi | |
| Eleven Eleven Excavating LLC | 5.0★ (1) | 14 mi |
| H & H Sewer & Pipe Cleaning | 5.0★ (1) | 13 mi |
| Kelmer Plumbing & Sewer | 5.0★ (2) | 14 mi |
| Landis Environmental Sewer Services | 5.0★ (1) | In St. Louis |
| Mario's Sewer & Drain Cleaning, LLC | 12 mi | |
| Miller Septic | 5.0★ (1) | 10 mi |
| Ross Excavating | 13 mi | |
| Royale Sewer and drains | 3 mi | |
| SweenCo Sewer Rehabilitation | 5.0★ (2) | 21 mi |
| The Home Depot | 4.1★ (1,812) | In St. Louis |
How we ranked St. Louis septic service companies
We scored 74 St. Louis septic service companies on ten factors, weighted as shown. A business is ranked when its trade is confirmed and it has 3 or more Google reviews or a claimed profile. A business with no Google reviews scores zero on rating, review volume and recency. Other unknown factors are left out, not counted as zero. Scores last refreshed November 3, 2026.
Paid placement never changes a rank or score. Featured businesses are paid, labelled, limited to 3 and shown above the ranking, outside it.
| Factor | Weight | Computed from | In St. Louis data |
|---|---|---|---|
| Reputation | 25% | Google star rating, adjusted for how many reviews back it | Measured |
| Credentials | 15% | Active state license, bond and workers’ comp on file | Not yet collected |
| Review volume | 10% | Number of Google reviews, compared with the most-reviewed business on the list | Measured |
| Recency | 5% | Share of reviews from the last 12 months | Not yet collected |
| Availability | 5% | Weekly open hours, Saturday, Sunday, 24/7 or same-day | Measured |
| Trade focus | 10% | How clearly the business does this trade (its Google category and name) | Measured |
| Proximity | 5% | Based in the city scores highest, less the farther away it is | Measured |
| Claimed profile | 10% | The business has claimed its ContractorsRanked profile (free or paid earn the same) | Measured |
| Partnered | 5% | The business links to ContractorsRanked from its own website with our badge, checked periodically | Measured |
| ContractorsRanked reviews | 10% | Verified customer reviews collected by ContractorsRanked: their rating and how many there are | Measured |
Septic service companies in St. Louis: frequently asked questions
Who is the best septic service company in St. Louis?
By CR Score, the highest-ranked septic service company in St. Louis, MO is Nolen Septic Services with a CR Score of 60/100. It has 5.0★ from 237 Google reviews. It is open 24/7. Maplewood Plumbing & Sewer, LLC. (#2) and Mr. Rooter Plumbing of St. Louis (#3) follow. We ranked 74 septic service companies on ten factors, last updated November 3, 2026.
How many septic service companies are there in St. Louis?
ContractorsRanked ranks 74 septic service companies serving St. Louis, MO. 18 of them are based in St. Louis; the rest serve it from nearby towns. Another 20 within 25 mi are listed but not ranked yet. Counts are as of November 2026.
Which septic service companies in St. Louis are open 24/7?
16 ranked septic service companies in St. Louis post 24/7 hours. The highest-ranked are Nolen Septic Services (#1), Mr. Rooter Plumbing of St. Louis (#3) and River City Sewer& Drain, L.L.C. (#5). Hours come from each business's Google listing as of November 2026, so call to confirm.
Which septic service companies in St. Louis work on weekends?
36 of 74 ranked septic service companies post Saturday hours and 27 post Sunday hours. The highest-ranked open Saturdays are Nolen Septic Services (#1), Mr. Rooter Plumbing of St. Louis (#3) and River City Sewer& Drain, L.L.C. (#5). Posted hours are office hours; crews may book weekend jobs separately.
What Google rating do St. Louis septic service companies have?
The median Google rating among 74 rated septic service companies in St. Louis is 4.7★, with a median of 21 reviews. Mr. Rooter Plumbing of St. Louis has the most, 2,141 reviews, and ranks #3. We adjust ratings for review count, so a few five-star reviews cannot top the list.
How does ContractorsRanked rank septic service companies?
Each septic service company gets a 0–100 CR Score from ten published factors, led by reputation (25%), credentials (15%), review volume (10%) and trade focus (10%). A business with no Google reviews scores zero on rating, review volume and recency; other factors we cannot measure are left out. Only businesses with a confirmed trade and 3 or more reviews, or a claimed profile, are ranked.
Do septic service companies outside St. Louis count in this ranking?
Yes, if they are within 25 mi of the St. Louis city center, our service radius for septic service companies. Each listing shows where the business is based and how far away it is. Proximity is 5% of the CR Score, so a nearby business gets a small edge.
Can septic service companies pay to rank higher on ContractorsRanked?
No. The CR Score never reads payment status, and this ranking has 0 paid placements. Up to 3 Featured businesses may appear above the list, labelled Featured and showing their honest rank.
Update log for St. Louis
- November 2026: CR Scores recalculated for 74 septic service companies serving St. Louis.
- November 2026: 1 duplicate listing merged.
More septic service companies and St. Louis pages
Septic service companies near St. Louis
- Septic service companies in University City, MO73 ranked
- Septic service companies in Clayton, MO74 ranked
- Septic service companies in Jennings, MO70 ranked
- Septic service companies in Lemay, MO76 ranked
- Septic service companies in Bellefontaine Neighbors, MO70 ranked
- Septic service companies in Webster Groves, MO75 ranked
- Septic service companies in Affton, MO75 ranked
- Septic service companies in Ferguson, MO70 ranked
- Septic service companies in Overland, MO68 ranked
- Septic service companies in Mehlville, MO75 ranked
Other trades in St. Louis
- Roofers in St. Louis695 ranked
- Plumbers in St. Louis346 ranked
- Electricians in St. Louis256 ranked
- HVAC contractors in St. Louis449 ranked
- General contractors in St. Louis546 ranked
- Painters in St. Louis187 ranked
- Landscapers in St. Louis243 ranked
- Handymen in St. Louis101 ranked
- Kitchen remodelers in St. Louis319 ranked
- Bathroom remodelers in St. Louis327 ranked
- Flooring contractors in St. Louis242 ranked
- Tile installers in St. Louis48 ranked
- Drywall contractors in St. Louis29 ranked
- Concrete contractors in St. Louis243 ranked
- Fence contractors in St. Louis119 ranked
- Deck builders in St. Louis169 ranked
- Siding contractors in St. Louis294 ranked
- Window installers in St. Louis201 ranked
- Gutter installers in St. Louis236 ranked
- Insulation contractors in St. Louis52 ranked
- Solar installers in St. Louis63 ranked
- Garage door repair companies in St. Louis107 ranked
- Foundation repair companies in St. Louis79 ranked
- Tree services in St. Louis274 ranked
- Masonry contractors in St. Louis148 ranked
- Water damage restoration companies in St. Louis262 ranked
- Home builders in St. Louis238 ranked
- Demolition contractors in St. Louis54 ranked
- Window cleaners in St. Louis54 ranked
- Pressure washing companies in St. Louis95 ranked
- Pest control companies in St. Louis108 ranked
- Paving contractors in St. Louis118 ranked
- Auto glass repair shops in St. Louis127 ranked
- Excavating contractors in St. Louis83 ranked
- Pool builders in St. Louis117 ranked
- All contractors in St. Louis