60/100CR Score
Ranked #1 because of its Google rating and review volume: 5.0★ from 2,219 Google reviews, the most in Wentzville.
Based on 8 of 10 factors; credentials and recency not yet collected.
Best Septic Service Companies in Wentzville, MO (2026)
24 septic service companies ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
The short answer
- 1
Best overall in Wentzville: Superior Service, CR Score 60/100; 5.0★ from 2,219 Google reviews; open 7 days a week.
- 2
Best for emergencies (open 24/7): Mission Septic And Drain, posts 24/7 hours; ranked #2 of 24.
- 5
Most-reviewed: Superior Service, 1,766 Google reviews at 4.9★, the most of 24 ranked after Superior Service; ranked #5.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
24 Wentzville septic service companies are ranked here by CR Score, from ten published factors. 8 are open 24/7, 18 open Saturdays and 11 open Sundays, based on posted hours. The median Google rating is 4.8★ across 24 rated businesses.
Top 10 septic service companies in Wentzville at a glance
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Superior Service | 60 | 5.0★ (2,219) | Dardenne Prairie, 4 mi away | Sat · Sun · Evenings | Overall |
| 2 | Mission Septic And Drain | 59 | 5.0★ (112) | O'Fallon, 18 mi away | 24/7 | Emergencies |
| 3 | Dc septic & drain | 57 | 4.7★ (15) | Troy, 10 mi away | 24/7 | — |
| 4 | A&M Septic and Excavating, LLC | 57 | 3.1★ (18) | O'Fallon, 2 mi away | 24/7 | — |
| 5 | Superior Service | 56 | 4.9★ (1,766) | Chesterfield, 16 mi away | Sat · Sun · Evenings | Most reviews |
| 6 | Mr. Rooter Plumbing of St. Charles | 55 | 4.8★ (356) | Saint Peters, 13 mi away | 24/7 | — |
| 7 | Pierson Plumbing Sewer & Drain L.L.C | 55 | 4.8★ (169) | Saint Charles, 20 mi away | 24/7 | — |
| 8 | Warrior Sewer and Drain | 54 | 4.8★ (459) | Chesterfield, 15 mi away | Sat · Evenings | — |
| 9 | Hillside Septic Service | 54 | 3.7★ (10) | O'Fallon, 12 mi away | Sat · Sun | — |
| 10 | The Sewer Pros | 53 | 4.9★ (594) | Chesterfield, 15 mi away | — | — |
The 24 best septic service companies in Wentzville, ranked
Ordered by CR Score, a 0–100 score from ten published factors. Paid placement never changes the order.
Based in O'Fallon, 18 mi away
59/100CR ScoreRanked #2 because of its Google rating and trade focus: 5.0★ from 112 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Troy, 10 mi away
57/100CR ScoreRanked #3 because of its Google rating and trade focus: 4.7★ 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 O'Fallon, 2 mi away
57/100CR ScoreRanked #4 because of its Google rating and trade focus: 3.1★ from 18 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Chesterfield, 16 mi away
56/100CR ScoreRanked #5 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 Saint Peters, 13 mi away
55/100CR ScoreRanked #6 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 Saint Charles, 20 mi away
55/100CR ScoreRanked #7 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 Chesterfield, 15 mi away
54/100CR ScoreRanked #8 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 O'Fallon, 12 mi away
54/100CR ScoreRanked #9 because of its Google rating and trade focus: 3.7★ from 10 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
#10 The Sewer Pros
Based in Chesterfield, 15 mi away
53/100CR ScoreRanked #10 because of its Google rating and review volume: 4.9★ from 594 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Godfrey, 19 mi away
53/100CR ScoreRanked #11 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.
#12 B & J Septic
Based in Troy, 13 mi away
53/100CR ScoreRanked #12 because of its Google rating and trade focus: 4.2★ from 18 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, 14 mi away
52/100CR ScoreRanked #13 because of its Google rating and trade focus: 4.8★ from 81 Google reviews, listed on Google as “Plumber”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Pacific, 23 mi away
51/100CR ScoreRanked #14 because of its Google rating and trade focus: 5.0★ from 14 Google reviews, listed on Google as “Septic system service”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
Based in Union, 24 mi away
50/100CR ScoreRanked #15 because of its Google rating and review volume: 4.8★ from 104 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Saint Ann, 25 mi away
50/100CR ScoreRanked #16 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 Washington, 20 mi away
49/100CR ScoreRanked #17 because of its Google rating and trade focus: 4.5★ from 13 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Creve Coeur, 22 mi away
49/100CR ScoreRanked #18 because of its Google rating and trade focus: 5.0★ from 40 Google reviews, listed on Google as “Plumber”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Bridgeton, 23 mi away
49/100CR ScoreRanked #19 because of its Google rating and trade focus: 3.7★ from 6 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Saint Peters, 14 mi away
49/100CR ScoreRanked #20 because of its Google rating and review volume: 4.8★ from 59 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Bridgeton, 21 mi away
47/100CR ScoreRanked #21 because of its Google rating and availability: 3.9★ from 7 Google reviews, open 24/7.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Warrenton, 8 mi away
46/100CR ScoreRanked #22 because of its Google rating and trade focus: 4.4★ from 28 Google reviews, listed on Google as “Contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Bowling Green, 7 mi away
46/100CR ScoreRanked #23 because of its Google rating and trade focus: 3.0★ from 6 Google reviews, listed on Google as “Plumber”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Bridgeton, 23 mi away
46/100CR ScoreRanked #24 because of its Google rating and trade focus: 4.0★ from 11 Google reviews, listed on Google as “Plumber”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
Also serving Wentzville
6 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 |
|---|---|---|
| Alpha Sewer N Drain | 16 mi | |
| Dc septic & drain | 14 mi | |
| Eco Septic Tank Pumping St Louis | 24 mi | |
| Mega Rooter sewer and Drain LLC | 19 mi | |
| O'Fallon Sewer & Plumbing Repair Service | 3 mi | |
| SweenCo Sewer Rehabilitation | 5.0★ (2) | 19 mi |
How we ranked Wentzville septic service companies
We scored 24 Wentzville 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 Wentzville 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 Wentzville: frequently asked questions
Who is the best septic service company in Wentzville?
By CR Score, the highest-ranked septic service company in Wentzville, MO is Superior Service with a CR Score of 60/100. It has 5.0★ from 2,219 Google reviews. It is open 7 days a week. Mission Septic And Drain (#2) and Dc septic & drain (#3) follow. We ranked 24 septic service companies on ten factors, last updated November 3, 2026.
How many septic service companies are there in Wentzville?
ContractorsRanked ranks 24 septic service companies serving Wentzville, MO. Another 6 within 25 mi are listed but not ranked yet. Counts are as of November 2026.
Which septic service companies in Wentzville are open 24/7?
8 ranked septic service companies in Wentzville post 24/7 hours. The highest-ranked are Mission Septic And Drain (#2), Dc septic & drain (#3) and A&M Septic and Excavating, LLC (#4). Hours come from each business's Google listing as of November 2026, so call to confirm.
Which septic service companies in Wentzville work on weekends?
18 of 24 ranked septic service companies post Saturday hours and 11 post Sunday hours. The highest-ranked open Saturdays are Superior Service (#1), Mission Septic And Drain (#2) and Dc septic & drain (#3). Posted hours are office hours; crews may book weekend jobs separately.
What Google rating do Wentzville septic service companies have?
The median Google rating among 24 rated septic service companies in Wentzville is 4.8★, with a median of 50 reviews. Superior Service has the most, 2,219 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 Wentzville count in this ranking?
Yes, if they are within 25 mi of the Wentzville 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 Wentzville
- November 2026: CR Scores recalculated for 24 septic service companies serving Wentzville.
More septic service companies and Wentzville pages
Septic service companies near Wentzville
- Septic service companies in Lake Saint Louis, MO31 ranked
- Septic service companies in Dardenne Prairie, MO40 ranked
- Septic service companies in O'Fallon, MO38 ranked
- Septic service companies in Saint Peters, MO47 ranked
- Septic service companies in Troy, MO9 ranked
- Septic service companies in Chesterfield, MO63 ranked
- Septic service companies in Wildwood, MO58 ranked
- Septic service companies in Washington, MO18 ranked
- Septic service companies in Saint Charles, MO59 ranked
- Septic service companies in Ballwin, MO62 ranked
Other trades in Wentzville
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- All contractors in Wentzville