61/100CR 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 Swansea, IL (2026)
56 septic service companies ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
The short answer
- 1
Best overall in Swansea: Nolen Septic Services, CR Score 61/100; 5.0★ from 237 Google reviews; open 24/7.
- 3
Best for emergencies (open 24/7): Shults Septic Service, LLC, posts 24/7 hours; ranked #3 of 56.
- 4
Most-reviewed: Mr. Rooter Plumbing of St. Louis, 2,141 Google reviews at 4.8★, the most of 56 ranked; ranked #4.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
56 Swansea septic service companies are ranked here by CR Score, from ten published factors. 11 are open 24/7, 23 open Saturdays and 20 open Sundays, based on posted hours. The median Google rating is 4.7★ across 56 rated businesses.
Top 10 septic service companies in Swansea at a glance
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Nolen Septic Services | 61 | 5.0★ (237) | Edwardsville, 18 mi away | 24/7 | Overall |
| 2 | Mitchell Environmental | 58 | 5.0★ (212) | Belleville, 7 mi away | — | — |
| 3 | Shults Septic Service, LLC | 57 | 5.0★ (15) | Belleville, 9 mi away | 24/7 | Emergencies |
| 4 | Mr. Rooter Plumbing of St. Louis | 55 | 4.8★ (2,141) | Ballwin, 25 mi away | 24/7 | Most reviews |
| 5 | River City Sewer& Drain, L.L.C. | 55 | 4.9★ (207) | Arnold, 21 mi away | 24/7 | — |
| 6 | V1 Environmental | 55 | 5.0★ (84) | Collinsville, 12 mi away | — | — |
| 7 | Maplewood Plumbing & Sewer, LLC. | 54 | 4.8★ (1,691) | St. Louis, 17 mi away | — | — |
| 8 | Miller Septic | 54 | 4.7★ (19) | Troy, 11 mi away | — | — |
| 9 | Alpha Sewer Services | 54 | 4.6★ (51) | Belleville, 1 mi away | — | — |
| 10 | R and M Sewer, Septic and Pipe Cleaning | 53 | 5.0★ (18) | Belleville, 7 mi away | — | — |
The 56 best septic service companies in Swansea, ranked
Ordered by CR Score, a 0–100 score from ten published factors. Paid placement never changes the order.
Based in Belleville, 7 mi away
58/100CR ScoreRanked #2 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 Belleville, 9 mi away
57/100CR ScoreRanked #3 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 Ballwin, 25 mi away
55/100CR ScoreRanked #4 because of its Google rating and review volume: 4.8★ from 2,141 Google reviews, the most in Swansea.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Arnold, 21 mi away
55/100CR 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 Collinsville, 12 mi away
55/100CR ScoreRanked #6 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 St. Louis, 17 mi away
54/100CR ScoreRanked #7 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 Troy, 11 mi away
54/100CR ScoreRanked #8 because of its Google rating and trade focus: 4.7★ from 19 Google reviews, listed on Google as “Septic system service”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
Based in Belleville, 1 mi away
54/100CR ScoreRanked #9 because of its Google rating and trade focus: 4.6★ from 51 Google reviews, listed on Google as “Plumber”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
Based in Belleville, 7 mi away
53/100CR ScoreRanked #10 because of its Google rating and trade focus: 5.0★ 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 St. Louis, 6 mi away
52/100CR ScoreRanked #11 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 Belleville, 9 mi away
52/100CR ScoreRanked #12 because of its Google rating and trade focus: 5.0★ from 83 Google reviews, listed on Google as “Plumber”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in St. Louis, 21 mi away
51/100CR ScoreRanked #13 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 Edwardsville, 19 mi away
51/100CR ScoreRanked #14 because of its Google rating and trade focus: 5.0★ from 14 Google reviews, listed on Google as “Plumber”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Sappington, 21 mi away
51/100CR 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, 18 mi away
51/100CR ScoreRanked #16 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 Belleville, 9 mi away
51/100CR ScoreRanked #17 because of its Google rating and trade focus: 5.0★ from 7 Google reviews, listed on Google as “Plumber”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Waterloo, 20 mi away
51/100CR ScoreRanked #18 because of its Google rating and trade focus: 4.7★ from 40 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Highland, 13 mi away
50/100CR ScoreRanked #19 because of its Google rating and trade focus: 5.0★ from 8 Google reviews, listed on Google as “Plumber”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in East Alton, 3 mi away
50/100CR ScoreRanked #20 because of its Google rating and availability: 3.7★ from 3 Google reviews, open 24/7.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in St. Louis, 24 mi away
49/100CR ScoreRanked #21 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, 21 mi away
49/100CR ScoreRanked #22 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 East Saint Louis, 6 mi away
49/100CR ScoreRanked #23 because of its Google rating and trade focus: 4.0★ from 8 Google reviews, listed on Google as “Construction company”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
Based in St. Louis, 17 mi away
49/100CR ScoreRanked #24 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, 15 mi away
49/100CR ScoreRanked #25 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.
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 56 ranked septic service companies here; the rest are on their profiles.
Also serving Swansea
17 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) | 22 mi |
| Biologix Products Group | 5.0★ (1) | 24 mi |
| Burke Plumbing | 22 mi | |
| C C Drain & Sewer Cleaning Co | 22 mi | |
| City Home Services Llc (Septic & Sewer) | 1.0★ (1) | 23 mi |
| D-A-C Home Inspections | 5.0★ (1) | 7 mi |
| Drain Cleaning St Louis | 5.0★ (1) | 20 mi |
| E Plumbing and Sewer | 5.0★ (2) | 16 mi |
| Eleven Eleven Excavating LLC | 5.0★ (1) | 7 mi |
| Gen x construction | 19 mi | |
| H & H Sewer & Pipe Cleaning | 5.0★ (1) | 13 mi |
| Kelmer Plumbing & Sewer | 5.0★ (2) | 15 mi |
| Landis Environmental Sewer Services | 5.0★ (1) | 24 mi |
| Mario's Sewer & Drain Cleaning, LLC | 25 mi | |
| Miller Septic | 5.0★ (1) | 3 mi |
| Ross Excavating | 11 mi | |
| Royale Sewer and drains | 16 mi |
How we ranked Swansea septic service companies
We scored 56 Swansea 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 2, 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 Swansea 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 Swansea: frequently asked questions
Who is the best septic service company in Swansea?
By CR Score, the highest-ranked septic service company in Swansea, IL is Nolen Septic Services with a CR Score of 61/100. It has 5.0★ from 237 Google reviews. It is open 24/7. Mitchell Environmental (#2) and Shults Septic Service, LLC (#3) follow. We ranked 56 septic service companies on ten factors, last updated November 2, 2026.
How many septic service companies are there in Swansea?
ContractorsRanked ranks 56 septic service companies serving Swansea, IL. Another 17 within 25 mi are listed but not ranked yet. Counts are as of November 2026.
Which septic service companies in Swansea are open 24/7?
11 ranked septic service companies in Swansea post 24/7 hours. The highest-ranked are Nolen Septic Services (#1), Shults Septic Service, LLC (#3) and Mr. Rooter Plumbing of St. Louis (#4). Hours come from each business's Google listing as of November 2026, so call to confirm.
Which septic service companies in Swansea work on weekends?
23 of 56 ranked septic service companies post Saturday hours and 20 post Sunday hours. The highest-ranked open Saturdays are Nolen Septic Services (#1), Shults Septic Service, LLC (#3) and Mr. Rooter Plumbing of St. Louis (#4). Posted hours are office hours; crews may book weekend jobs separately.
What Google rating do Swansea septic service companies have?
The median Google rating among 56 rated septic service companies in Swansea is 4.7★, with a median of 19 reviews. Mr. Rooter Plumbing of St. Louis has the most, 2,141 reviews, and ranks #4. 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 Swansea count in this ranking?
Yes, if they are within 25 mi of the Swansea 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 Swansea
- November 2026: CR Scores recalculated for 56 septic service companies serving Swansea.
- November 2026: 1 duplicate listing merged.
More septic service companies and Swansea pages
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