59/100CR Score
Ranked #1 because of its Google rating and review volume: 4.8★ from 2,141 Google reviews, the most in Lemay.
Based on 8 of 10 factors; credentials and recency not yet collected.
Best Septic Service Companies in Lemay, MO (2026)
76 septic service companies ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
The short answer
- 1
Best overall in Lemay: Mr. Rooter Plumbing of St. Louis, CR Score 59/100; 4.8★ from 2,141 Google reviews; open 24/7.
- 2
Best for emergencies (open 24/7): River City Sewer& Drain, L.L.C., posts 24/7 hours; ranked #2 of 76.
- 9
Most-reviewed: Superior Service, 1,766 Google reviews at 4.9★, the most of 76 ranked after Mr. Rooter Plumbing of St. Louis; ranked #9.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
76 Lemay septic service companies are ranked here by CR Score, from ten published factors. 15 are open 24/7, 35 open Saturdays and 26 open Sundays, based on posted hours. The median Google rating is 4.7★ across 76 rated businesses.
Top 10 septic service companies in Lemay at a glance
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Mr. Rooter Plumbing of St. Louis | 59 | 4.8★ (2,141) | Ballwin, 9 mi away | 24/7 | Overall |
| 2 | River City Sewer& Drain, L.L.C. | 59 | 4.9★ (207) | Arnold, 8 mi away | 24/7 | Emergencies |
| 3 | Maplewood Plumbing & Sewer, LLC. | 57 | 4.8★ (1,691) | St. Louis, 5 mi away | — | — |
| 4 | Shults Septic Service, LLC | 57 | 5.0★ (15) | Belleville, 12 mi away | 24/7 | — |
| 5 | Mitchell Environmental | 56 | 5.0★ (212) | Belleville, 17 mi away | — | — |
| 6 | DRD Environmental Septic System Design | 55 | 4.8★ (19) | St. Louis, 5 mi away | Sat | — |
| 7 | All Purpose Sewer & Drain Clng | 55 | 4.7★ (23) | Sappington, 5 mi away | 24/7 | — |
| 8 | Oberkramer Septic Solutions, LLC | 55 | 5.0★ (105) | Wildwood, 23 mi away | — | — |
| 9 | Superior Service | 55 | 4.9★ (1,766) | Chesterfield, 21 mi away | Sat · Sun · Evenings | Most reviews |
| 10 | Shamrock Sewer & Drain | 55 | 4.8★ (304) | Pacific, 24 mi away | 24/7 | — |
The 76 best septic service companies in Lemay, ranked
Ordered by CR Score, a 0–100 score from ten published factors. Paid placement never changes the order.
Based in Arnold, 8 mi away
59/100CR ScoreRanked #2 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, 5 mi away
57/100CR ScoreRanked #3 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 Belleville, 12 mi away
57/100CR ScoreRanked #4 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 Belleville, 17 mi away
56/100CR ScoreRanked #5 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 St. Louis, 5 mi away
55/100CR 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 Sappington, 5 mi away
55/100CR ScoreRanked #7 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 Wildwood, 23 mi away
55/100CR ScoreRanked #8 because of its Google rating and trade focus: 5.0★ from 105 Google reviews, listed on Google as “Septic system service”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
Based in Chesterfield, 21 mi away
55/100CR ScoreRanked #9 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 Pacific, 24 mi away
55/100CR ScoreRanked #10 because of its Google rating and review volume: 4.8★ from 304 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Saint Charles, 20 mi away
55/100CR ScoreRanked #11 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 Godfrey, 17 mi away
53/100CR ScoreRanked #12 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, 7 mi away
53/100CR ScoreRanked #13 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.
#14 V1 Environmental
Based in Collinsville, 21 mi away
53/100CR ScoreRanked #14 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.
Based in Webster Groves, 5 mi away
53/100CR ScoreRanked #15 because of its Google rating and availability: 4.6★ from 31 Google reviews, open 24/7.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Chesterfield, 22 mi away
53/100CR ScoreRanked #16 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.
Based in Kirkwood, 8 mi away
53/100CR ScoreRanked #17 because of its Google rating and trade focus: 3.7★ from 9 Google reviews, listed on Google as “Septic system service”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
Based in Saint Peters, 23 mi away
53/100CR ScoreRanked #18 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, 11 mi away
53/100CR ScoreRanked #19 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, 4 mi away
53/100CR ScoreRanked #20 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 St. Louis, 3 mi away
52/100CR ScoreRanked #21 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 Ann, 15 mi away
52/100CR ScoreRanked #22 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, 14 mi away
52/100CR ScoreRanked #23 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 St. Louis, 11 mi away
52/100CR ScoreRanked #24 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.
Based in Arnold, 9 mi away
52/100CR ScoreRanked #25 because of its Google rating and trade focus: 4.0★ from 105 Google reviews, listed on Google as “Plumber”.
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 76 ranked septic service companies here; the rest are on their profiles.
Also serving Lemay
18 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) | 21 mi |
| Biologix Products Group | 5.0★ (1) | 12 mi |
| Burke Plumbing | 16 mi | |
| C C Drain & Sewer Cleaning Co | 18 mi | |
| D-A-C Home Inspections | 5.0★ (1) | 19 mi |
| Drain Cleaning St Louis | 5.0★ (1) | 5 mi |
| E Plumbing and Sewer | 5.0★ (2) | 9 mi |
| Eco Septic Tank Pumping St Louis | 13 mi | |
| Eleven Eleven Excavating LLC | 5.0★ (1) | 12 mi |
| H & H Sewer & Pipe Cleaning | 5.0★ (1) | 8 mi |
| Kelmer Plumbing & Sewer | 5.0★ (2) | 22 mi |
| Landis Environmental Sewer Services | 5.0★ (1) | 16 mi |
| Mario's Sewer & Drain Cleaning, LLC | 11 mi | |
| Mega Rooter sewer and Drain LLC | 17 mi | |
| Miller Septic | 5.0★ (1) | 13 mi |
| Ross Excavating | 20 mi | |
| Royale Sewer and drains | 9 mi | |
| SweenCo Sewer Rehabilitation | 5.0★ (2) | 23 mi |
How we ranked Lemay septic service companies
We scored 76 Lemay 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 Lemay 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 Lemay: frequently asked questions
Who is the best septic service company in Lemay?
By CR Score, the highest-ranked septic service company in Lemay, MO is Mr. Rooter Plumbing of St. Louis with a CR Score of 59/100. It has 4.8★ from 2,141 Google reviews. It is open 24/7. River City Sewer& Drain, L.L.C. (#2) and Maplewood Plumbing & Sewer, LLC. (#3) follow. We ranked 76 septic service companies on ten factors, last updated November 3, 2026.
How many septic service companies are there in Lemay?
ContractorsRanked ranks 76 septic service companies serving Lemay, MO. Another 18 within 25 mi are listed but not ranked yet. Counts are as of November 2026.
Which septic service companies in Lemay are open 24/7?
15 ranked septic service companies in Lemay post 24/7 hours. The highest-ranked are Mr. Rooter Plumbing of St. Louis (#1), River City Sewer& Drain, L.L.C. (#2) and Shults Septic Service, LLC (#4). Hours come from each business's Google listing as of November 2026, so call to confirm.
Which septic service companies in Lemay work on weekends?
35 of 76 ranked septic service companies post Saturday hours and 26 post Sunday hours. The highest-ranked open Saturdays are Mr. Rooter Plumbing of St. Louis (#1), River City Sewer& Drain, L.L.C. (#2) and Shults Septic Service, LLC (#4). Posted hours are office hours; crews may book weekend jobs separately.
What Google rating do Lemay septic service companies have?
The median Google rating among 76 rated septic service companies in Lemay is 4.7★, with a median of 23 reviews. Mr. Rooter Plumbing of St. Louis has the most, 2,141 reviews, and ranks #1. 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 Lemay count in this ranking?
Yes, if they are within 25 mi of the Lemay 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 Lemay
- November 2026: CR Scores recalculated for 76 septic service companies serving Lemay.
- November 2026: 1 duplicate listing merged.
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