186 plumbers ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in O'Fallon: Roto-Rooter Plumbing & Water Cleanup, CR Score 92/100; 4.8★ from 2,790 Google reviews; open 24/7.
Best for emergencies (open 24/7): CLEANSTREAM LLC, posts 24/7 hours; ranked #2 of 186.
Most-reviewed: Morrison Plumbing, Heating, Air, & Electrical Services, 8,631 Google reviews at 4.9★, the most of 186 ranked; ranked #6.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
186 O'Fallon plumbers are ranked here by CR Score, from 8 published factors. 43 are open 24/7, 83 open Saturdays and 65 open Sundays, based on posted hours. The median Google rating is 4.7★ across 186 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Roto-Rooter Plumbing & Water Cleanup | 92 | 4.8★ (2,790) | Belleville, 7 mi away | 24/7 | Overall |
| 2 | CLEANSTREAM LLC | 91 | 5.0★ (202) | O'Fallon | 24/7 | Emergencies |
| 3 | Embrich Plumbing Co. | 91 | 4.9★ (1,201) | Maryville, 9 mi away | 24/7 | — |
| 4 | Roto-Rooter Plumbing & Water Cleanup | 90 | 4.8★ (5,589) | St. Louis, 17 mi away | 24/7 | — |
| 5 | Polar Plumbing, Heating & Air Conditioning | 90 | 5.0★ (197) | Belleville, 5 mi away | 24/7 | — |
| 6 | Morrison Plumbing, Heating, Air, & Electrical Services | 90 | 4.9★ (8,631) | Collinsville, 9 mi away | 24/7 | Most reviews |
| 7 | Nolen Septic Services | 88 | 5.0★ (237) | Edwardsville, 13 mi away | 24/7 | — |
| 8 | Tiger Plumbing, Heating, Air Conditioning, & Electrical Services | 87 | 4.7★ (5,072) | Collinsville, 8 mi away | 24/7 | — |
| 9 | Polar Plumbing, Heating & Air Conditioning | 87 | 5.0★ (514) | Collinsville, 8 mi away | 24/7 | — |
| 10 | Culler Plumbing Services | 87 | 4.6★ (55) | East Saint Louis, 2 mi away | 24/7 | — |
Ordered by CR Score, a 0–100 score from 8 published factors. Paid placement never changes the order.
Ranked #1 because of its Google rating and availability: 4.8★ from 2,790 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in O'Fallon
Ranked #2 because of its Google rating and availability: 5.0★ from 202 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Maryville, 9 mi away
Ranked #3 because of its Google rating and availability: 4.9★ from 1,201 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in St. Louis, 17 mi away
Ranked #4 because of its Google rating and availability: 4.8★ from 5,589 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Belleville, 5 mi away
Ranked #5 because of its Google rating and availability: 5.0★ from 197 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Collinsville, 9 mi away
Ranked #6 because of its Google rating and availability: 4.9★ from 8,631 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Edwardsville, 13 mi away
Ranked #7 because of its Google rating and availability: 5.0★ from 237 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Collinsville, 8 mi away
Ranked #8 because of its Google rating and availability: 4.7★ from 5,072 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Collinsville, 8 mi away
Ranked #9 because of its Google rating and availability: 5.0★ from 514 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in East Saint Louis, 2 mi away
Ranked #10 because of its Google rating and availability: 4.6★ from 55 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Belleville, 6 mi away
Ranked #11 because of its Google rating and availability: 4.6★ from 171 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Fairview Heights, 4 mi away
Ranked #12 because of its Google rating and availability: 5.0★ from 1,160 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Staunton, 10 mi away
Ranked #13 because of its Google rating and availability: 4.9★ from 50 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Mascoutah, 7 mi away
Ranked #14 because of its Google rating and availability: 5.0★ from 19 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Edwardsville, 12 mi away
Ranked #15 because of its Google rating and availability: 4.9★ from 43 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Belleville, 8 mi away
Ranked #16 because of its Google rating and availability: 4.9★ from 1,500 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in St. Louis, 19 mi away
Ranked #17 because of its Google rating and availability: 4.9★ from 76 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Belleville, 3 mi away
Ranked #18 because of its Google rating and trade focus: 4.9★ from 45 Google reviews, listed on Google as “Plumber”.
Based on 5 of 8 factors; credentials, recency and availability not yet collected.
Based in Collinsville, 8 mi away
Ranked #19 because of its Google rating and availability: 4.3★ from 35 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in East Saint Louis, 2 mi away
Ranked #20 because of its Google rating and trade focus: 5.0★ from 22 Google reviews, listed on Google as “Plumber”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in East Alton, 4 mi away
Ranked #21 because of its Google rating and availability: 3.7★ from 3 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in East Saint Louis, 13 mi away
Ranked #22 because of its Google rating and availability: 4.3★ from 215 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Edwardsville, 15 mi away
Ranked #23 because of its Google rating and availability: 5.0★ from 14 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in East Alton, 22 mi away
Ranked #24 because of its Google rating and availability: 5.0★ from 27 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in East Saint Louis, 4 mi away
Ranked #25 because of its Google rating and availability: 4.9★ from 40 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
#1 to #25 are shown in full above. Here are #26 to #29, in CR Score order; each links to its profile. We publish the top 29 of 186 ranked plumbers here; the rest are on their profiles.
| Rank | Business | CR Score | Google rating | Distance |
|---|---|---|---|---|
| 26 | Dig N Drain | 82 | 5.0★ (7) | 15 mi |
| 29 | Linek Plumbing Company | 81 | 4.6★ (116) | 24 mi |
National price ranges in USD, not adjusted for O'Fallon. Each row names its basis and the month we checked it.
| Job | Low | Typical | High | Basis | Checked |
|---|---|---|---|---|---|
| Water heater replacement | $882 | $1,348 | $1,826 | Per unit, installed (unit plus labor); typical range of customer-reported jobs. US national range | October 2026 |
In Illinois, Illinois Department of Public Health, Plumbing Program licenses Plumber licenses and plumbing contractor registration (Chicago licenses its own plumbers).
No chip usually means we have not matched a state record yet. Check the lookup yourself before you hire.
Guide checked October 2026. How we verify licenses
We scored 186 O'Fallon plumbers on 8 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. Unknown factors are left out of the score, not counted as zero. Scores last refreshed October 22, 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 O'Fallon data |
|---|---|---|---|
| Reputation | 35% | Bayesian-adjusted Google star rating | Measured |
| Credentials | 15% | Active state license 0.6, bond 0.2, workers’ comp 0.2 | Not yet collected |
| Review volume | 10% | log10(reviews + 1) against the list maximum | Measured |
| Recency | 10% | Share of reviews from the last 12 months | Not yet collected |
| Availability | 10% | Weekly open hours, Saturday, Sunday, 24/7 or same-day | Measured |
| Trade focus | 10% | Google main category 1.0, business name 0.7, additional category 0.5 | Measured |
| Proximity | 5% | 1.0 when based in the city, falling to 0 at the trade’s radius | Measured |
| Completeness | 5% | Website, photos, description, hours, claimed profile (0.2 each) | Measured |