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 Cahokia, IL (2026)
72 septic service companies ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
The short answer
- 1
Best overall in Cahokia: Nolen Septic Services, CR Score 60/100; 5.0★ from 237 Google reviews; open 24/7.
- 2
Best for emergencies (open 24/7): Mr. Rooter Plumbing of St. Louis, posts 24/7 hours; ranked #2 of 72.
- 2
Most-reviewed: Mr. Rooter Plumbing of St. Louis, 2,141 Google reviews at 4.8★, the most of 72 ranked; ranked #2.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
72 Cahokia septic service companies are ranked here by CR Score, from ten published factors. 15 are open 24/7, 33 open Saturdays and 26 open Sundays, based on posted hours. The median Google rating is 4.7★ across 72 rated businesses.
Top 10 septic service companies in Cahokia at a glance
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Nolen Septic Services | 60 | 5.0★ (237) | Edwardsville, 20 mi away | 24/7 | Overall |
| 2 | Mr. Rooter Plumbing of St. Louis | 58 | 4.8★ (2,141) | Ballwin, 14 mi away | 24/7 | Emergencies, Most reviews |
| 3 | River City Sewer& Drain, L.L.C. | 57 | 4.9★ (207) | Arnold, 13 mi away | 24/7 | — |
| 4 | Shults Septic Service, LLC | 57 | 5.0★ (15) | Belleville, 11 mi away | 24/7 | — |
| 5 | Mitchell Environmental | 57 | 5.0★ (212) | Belleville, 11 mi away | — | — |
| 6 | Maplewood Plumbing & Sewer, LLC. | 57 | 4.8★ (1,691) | St. Louis, 6 mi away | — | — |
| 7 | Pierson Plumbing Sewer & Drain L.L.C | 54 | 4.8★ (169) | Saint Charles, 22 mi away | 24/7 | — |
| 8 | V1 Environmental | 54 | 5.0★ (84) | Collinsville, 16 mi away | — | — |
| 9 | Superior Service | 54 | 4.9★ (1,766) | Chesterfield, 24 mi away | Sat · Sun · Evenings | — |
| 10 | DRD Environmental Septic System Design | 54 | 4.8★ (19) | St. Louis, 11 mi away | Sat | — |
The 72 best septic service companies in Cahokia, ranked
Ordered by CR Score, a 0–100 score from ten published factors. Paid placement never changes the order.
Based in Ballwin, 14 mi away
58/100CR ScoreRanked #2 because of its Google rating and review volume: 4.8★ from 2,141 Google reviews, the most in Cahokia.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Arnold, 13 mi away
57/100CR ScoreRanked #3 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 Belleville, 11 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, 11 mi away
57/100CR 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, 6 mi away
57/100CR ScoreRanked #6 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 Saint Charles, 22 mi away
54/100CR 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 Collinsville, 16 mi away
54/100CR ScoreRanked #8 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 Chesterfield, 24 mi away
54/100CR 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 St. Louis, 11 mi away
54/100CR ScoreRanked #10 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, 10 mi away
54/100CR ScoreRanked #11 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, 9 mi away
53/100CR ScoreRanked #12 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 Godfrey, 20 mi away
53/100CR ScoreRanked #13 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.
#14 Miller Septic
Based in Troy, 18 mi away
52/100CR ScoreRanked #14 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 St. Louis, 6 mi away
52/100CR ScoreRanked #15 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, 4 mi away
52/100CR ScoreRanked #16 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 St. Louis, 11 mi away
52/100CR ScoreRanked #17 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 Saint Ann, 16 mi away
52/100CR ScoreRanked #18 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 #19 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, 3 mi away
52/100CR ScoreRanked #20 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 Belleville, 12 mi away
52/100CR ScoreRanked #21 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 Webster Groves, 9 mi away
52/100CR ScoreRanked #22 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 St. Louis, 13 mi away
52/100CR ScoreRanked #23 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 Kirkwood, 12 mi away
52/100CR ScoreRanked #24 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 St. Louis, 6 mi away
51/100CR ScoreRanked #25 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.
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 72 ranked septic service companies here; the rest are on their profiles.
Also serving Cahokia
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) | 18 mi |
| Biologix Products Group | 5.0★ (1) | 14 mi |
| Burke Plumbing | 14 mi | |
| C C Drain & Sewer Cleaning Co | 15 mi | |
| City Home Services Llc (Septic & Sewer) | 1.0★ (1) | 24 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) | 6 mi |
| Eco Septic Tank Pumping St Louis | 16 mi | |
| Eleven Eleven Excavating LLC | 5.0★ (1) | 10 mi |
| Gen x construction | 24 mi | |
| H & H Sewer & Pipe Cleaning | 5.0★ (1) | 9 mi |
| Kelmer Plumbing & Sewer | 5.0★ (2) | 17 mi |
| Landis Environmental Sewer Services | 5.0★ (1) | 15 mi |
| Mario's Sewer & Drain Cleaning, LLC | 14 mi | |
| Mega Rooter sewer and Drain LLC | 20 mi | |
| Miller Septic | 5.0★ (1) | 9 mi |
| Ross Excavating | 14 mi | |
| Royale Sewer and drains | 6 mi | |
| SweenCo Sewer Rehabilitation | 5.0★ (2) | 24 mi |
How we ranked Cahokia septic service companies
We scored 72 Cahokia 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 Cahokia 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 Cahokia: frequently asked questions
Who is the best septic service company in Cahokia?
By CR Score, the highest-ranked septic service company in Cahokia, IL is Nolen Septic Services with a CR Score of 60/100. It has 5.0★ from 237 Google reviews. It is open 24/7. Mr. Rooter Plumbing of St. Louis (#2) and River City Sewer& Drain, L.L.C. (#3) follow. We ranked 72 septic service companies on ten factors, last updated November 3, 2026.
How many septic service companies are there in Cahokia?
ContractorsRanked ranks 72 septic service companies serving Cahokia, IL. Another 20 within 25 mi are listed but not ranked yet. Counts are as of November 2026.
Which septic service companies in Cahokia are open 24/7?
15 ranked septic service companies in Cahokia post 24/7 hours. The highest-ranked are Nolen Septic Services (#1), Mr. Rooter Plumbing of St. Louis (#2) and River City Sewer& Drain, L.L.C. (#3). Hours come from each business's Google listing as of November 2026, so call to confirm.
Which septic service companies in Cahokia work on weekends?
33 of 72 ranked septic service companies post Saturday hours and 26 post Sunday hours. The highest-ranked open Saturdays are Nolen Septic Services (#1), Mr. Rooter Plumbing of St. Louis (#2) and River City Sewer& Drain, L.L.C. (#3). Posted hours are office hours; crews may book weekend jobs separately.
What Google rating do Cahokia septic service companies have?
The median Google rating among 72 rated septic service companies in Cahokia is 4.7★, with a median of 19 reviews. Mr. Rooter Plumbing of St. Louis has the most, 2,141 reviews, and ranks #2. 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 Cahokia count in this ranking?
Yes, if they are within 25 mi of the Cahokia 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 Cahokia
- November 2026: CR Scores recalculated for 72 septic service companies serving Cahokia.
- November 2026: 1 duplicate listing merged.
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