50 plumbers ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Corunna: Dunnrite Sewer & Drain Cleaning, CR Score 91/100; 4.9★ from 369 Google reviews; open 24/7.
Best for emergencies (open 24/7): Modern Sewer & drain cleaning, posts 24/7 hours; ranked #2 of 50.
Most-reviewed: Reliance Home Comfort, 3,256 Google reviews at 4.8★, the most of 50 ranked; ranked #7.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
50 Corunna plumbers are ranked here by CR Score, from 8 published factors. 23 are open 24/7, 26 open Saturdays and 21 open Sundays, based on posted hours. The median Google rating is 4.8★ across 50 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Dunnrite Sewer & Drain Cleaning | 91 | 4.9★ (369) | Port Huron, 13 km away | 24/7 | Overall |
| 2 | Modern Sewer & drain cleaning | 90 | 4.9★ (266) | Sarnia, 12 km away | 24/7 | Emergencies |
| 3 | Vincent's Heating & Plumbing Inc | 88 | 4.8★ (997) | Port Huron, 9 km away | 24/7 | — |
| 4 | Royalty Plumbing | 88 | 5.0★ (189) | Sarnia, 28 km away | 24/7 | — |
| 5 | Royalty Plumbing | 88 | 4.9★ (63) | Sarnia, 12 km away | 24/7 | — |
| 6 | A. Webster Sewer & Drain | 87 | 4.9★ (76) | Sarnia, 16 km away | 24/7 | — |
| 7 | Reliance Home Comfort | 87 | 4.8★ (3,256) | Sarnia, 10 km away | 24/7 | Most reviews |
| 8 | Port Huron Sewer Cleaning | 86 | 5.0★ (47) | Sarnia, 23 km away | 24/7 | — |
| 9 | JJ & Sons Plumbing Service | 85 | 4.8★ (76) | Clinton Township, 25 km away | 24/7 | — |
| 10 | Root Away Sewer and Drain Cleaning | 85 | 5.0★ (32) | Sarnia, 14 km 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: 4.9★ from 369 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Sarnia, 12 km away
Ranked #2 because of its Google rating and availability: 4.9★ from 266 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Port Huron, 9 km away
Ranked #3 because of its Google rating and availability: 4.8★ from 997 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Sarnia, 28 km away
Ranked #4 because of its Google rating and availability: 5.0★ from 189 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Sarnia, 12 km away
Ranked #5 because of its Google rating and availability: 4.9★ from 63 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Sarnia, 16 km away
Ranked #6 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 Sarnia, 10 km away
Ranked #7 because of its Google rating and review volume: 4.8★ from 3,256 Google reviews, the most Google reviews on this list (3,256).
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Sarnia, 23 km away
Ranked #8 because of its Google rating and availability: 5.0★ from 47 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Clinton Township, 25 km away
Ranked #9 because of its Google rating and availability: 4.8★ from 76 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Sarnia, 14 km away
Ranked #10 because of its Google rating and availability: 5.0★ from 32 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Sarnia, 7 km away
Ranked #11 because of its Google rating and availability: 4.5★ from 35 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Sarnia, 17 km away
Ranked #12 because of its Google rating and availability: 5.0★ from 309 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Sarnia, 10 km away
Ranked #13 because of its Google rating and availability: 5.0★ from 20 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Port Huron, 13 km away
Ranked #14 because of its Google rating and trade focus: 4.6★ from 41 Google reviews, listed on Google as “Plumber”.
Based on 5 of 8 factors; credentials, recency and availability not yet collected.
Based in Port Huron, 8 km away
Ranked #15 because of its Google rating and trade focus: 4.6★ from 14 Google reviews, listed on Google as “Plumber”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Sarnia, 25 km away
Ranked #16 because of its Google rating and availability: 4.4★ from 45 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Sarnia, 11 km away
Ranked #17 because of its Google rating and trade focus: 4.8★ from 11 Google reviews, listed on Google as “Plumber”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Sarnia, 19 km away
Ranked #18 because of its Google rating and trade focus: 5.0★ from 12 Google reviews, listed on Google as “Plumber”.
Based on 5 of 8 factors; credentials, recency and availability not yet collected.
Based in New Haven, 35 km away
Ranked #19 because of its Google rating and availability: 4.4★ from 7 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Clinton Township, 38 km away
Ranked #20 because of its Google rating and availability: 4.2★ from 15 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Sarnia, 21 km away
Ranked #21 because of its Google rating and trade focus: 4.5★ from 53 Google reviews, listed on Google as “Plumber”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in New Baltimore, 36 km away
Ranked #22 because of its Google rating and trade focus: 4.7★ from 47 Google reviews, listed on Google as “Plumber”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Sarnia, 16 km away
Ranked #23 because of its Google rating and availability: 5.0★ from 5 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Sarnia, 27 km away
Ranked #24 because of its Google rating and trade focus: 4.9★ from 113 Google reviews, listed on Google as “Plumber”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Richmond, 28 km away
Ranked #25 because of its Google rating and trade focus: 4.5★ from 8 Google reviews, listed on Google as “Plumber”.
Based on 6 of 8 factors; credentials and recency not yet collected.
#1 to #25 are shown in full above. Here are #27 to #32, in CR Score order; each links to its profile. We publish the top 32 of 50 ranked plumbers here; the rest are on their profiles.
| Rank | Business | CR Score | Google rating | Distance |
|---|---|---|---|---|
| 27 | Jack and Sons Sewer Cleaning | 77 | 3.0★ (6) | 11 km |
| 28 | MK Contracting & Demolition | 77 | 5.0★ (6) | 12 km |
| 32 | Vartys Construction Inc | 76 | 5.0★ (6) | 11 km |
US national ranges converted to CAD, not adjusted for Corunna. Each row names its basis and the month we checked it.
| Job | Low | Typical | High | Basis | Checked |
|---|---|---|---|---|---|
| Water heater replacement | CA$1,240 | CA$1,890 | CA$2,570 | Per unit, installed (unit plus labor); typical range of customer-reported jobs. US national range converted at 1.4054 CAD per USD (Bank of Canada, October 20, 2026) | October 2026 |
We scored 50 Corunna 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 Corunna 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 |