Plumbers in Thunder Bay
17 plumbers in Thunder Bay with multi-platform trust scores.
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Who is the best plumber in Thunder Bay, Ontario?
The most trusted plumber in Thunder Bay, Ontario is Reliance Heating, Air Conditioning & Plumbing, with a ProScore of 72/100. ProScore has scored 17 plumbers in Thunder Bay across 10+ data sources and 20+ trust signals. 2 of the 17 are Trusted-tier (70+) or higher.
Trust scores last computed between August 30, 2026 and September 19, 2026.
Which plumbers in Thunder Bay score highest?
All 17 scored plumbers in Thunder Bay, ranked by ProScore.
ProScore scores 17 plumbers in Thunder Bay, and their average score is 60 out of 100. 2 of them reach the Trusted threshold of 70 or higher. 8 are registered with WSIB. 17 have Google reviews on file — 2,047 reviews in total, and 6 carry a Better Business Bureau rating.
Reliance Heating, Air Conditioning & Plumbing ranks 1st of the 17 plumbers ProScore scores in Thunder Bay, holding a ProScore of 72 out of 100 (Trusted tier). Its score draws on 1,618 Google reviews averaging 4.6 out of 5 and a Better Business Bureau rating of A+.
Craig Plumbing Centre ranks 2nd of the 17 plumbers ProScore scores in Thunder Bay, holding a ProScore of 70 out of 100 (Trusted tier). Its score draws on 49 Google reviews averaging 4.0 out of 5 and a Better Business Bureau rating of A+. Public records show it is registered with WSIB.
B. Gibson Mechanical ranks 3rd of the 17 plumbers ProScore scores in Thunder Bay, holding a ProScore of 69 out of 100 (Good tier). Its score draws on 52 Google reviews averaging 4.2 out of 5. Public records show it is registered with WSIB. Its ProScore has risen since the previous recompute.
Clow Darling Limited ranks 4th of the 17 plumbers ProScore scores in Thunder Bay, holding a ProScore of 68 out of 100 (Good tier). Its score draws on 72 Google reviews averaging 4.2 out of 5. Public records show it is registered with WSIB.
NWO Well Services Ltd ranks 5th of the 17 plumbers ProScore scores in Thunder Bay, holding a ProScore of 66 out of 100 (Good tier). Its score draws on 20 Google reviews averaging 5.0 out of 5.
Superior Water Solutions ranks 6th of the 17 plumbers ProScore scores in Thunder Bay, holding a ProScore of 64 out of 100 (Good tier). Its score draws on 13 Google reviews averaging 5.0 out of 5. Its ProScore has risen since the previous recompute.
Aqua North Plumbing & Heating ranks 7th of the 17 plumbers ProScore scores in Thunder Bay, holding a ProScore of 62 out of 100 (Good tier). Its score draws on 11 Google reviews averaging 5.0 out of 5. Public records show it is registered with WSIB.
Bud's Thunder Bay Pressure Clean Ltd ranks 8th of the 17 plumbers ProScore scores in Thunder Bay, holding a ProScore of 62 out of 100 (Good tier). Its score draws on 11 Google reviews averaging 5.0 out of 5.
A Villeneuve Mechanical Ltd ranks 9th of the 17 plumbers ProScore scores in Thunder Bay, holding a ProScore of 61 out of 100 (Good tier). Its score draws on 36 Google reviews averaging 4.7 out of 5. Public records show it is registered with WSIB. Its ProScore has risen since the previous recompute.
Thermal Mechanical Systems Inc. ranks 10th of the 17 plumbers ProScore scores in Thunder Bay, holding a ProScore of 60 out of 100 (Good tier). Its score draws on 22 Google reviews averaging 3.7 out of 5.
Adept Plumbing & Mechanical ranks 11th of the 17 plumbers ProScore scores in Thunder Bay, holding a ProScore of 58 out of 100 (Good tier). Its score draws on 10 Google reviews averaging 4.1 out of 5 and a Better Business Bureau rating of A+.
MJ Pipeline Solutions ranks 12th of the 17 plumbers ProScore scores in Thunder Bay, holding a ProScore of 57 out of 100 (Good tier). Its score draws on 1 Google review averaging 5.0 out of 5. Public records show it is registered with WSIB.
Elite Plumbing Solutions Inc ranks 13th of the 17 plumbers ProScore scores in Thunder Bay, holding a ProScore of 54 out of 100 (Good tier). Its score draws on 3 Google reviews averaging 5.0 out of 5 and a Better Business Bureau rating of A+. Public records show it is registered with WSIB. Its ProScore has risen since the previous recompute.
Robert's Plumbing & Sheet Metal Co ranks 14th of the 17 plumbers ProScore scores in Thunder Bay, holding a ProScore of 52 out of 100 (Basic tier). Its score draws on 115 Google reviews averaging 3.9 out of 5 and a Better Business Bureau rating of A+.
Scharf Mechanical Ltd ranks 15th of the 17 plumbers ProScore scores in Thunder Bay, holding a ProScore of 50 out of 100 (Basic tier). Its score draws on 4 Google reviews averaging 4.0 out of 5 and a Better Business Bureau rating of A+. Public records show it is registered with WSIB.
Axel's Water & Plumbing Centre ranks 16th of the 17 plumbers ProScore scores in Thunder Bay, holding a ProScore of 48 out of 100 (Basic tier). Its score draws on 9 Google reviews averaging 3.3 out of 5.
Dell Mechanical Contracting ranks 17th of the 17 plumbers ProScore scores in Thunder Bay, holding a ProScore of 48 out of 100 (Basic tier). Its score draws on 1 Google review averaging 1.0 out of 5. Its ProScore has risen since the previous recompute.
Of 17 plumbers in Thunder Bay: 0 rated Elite (81+), 2 rated Trusted (70+), and 11 rated Good (54+).
How is a plumber's ProScore calculated?
Every plumber in Thunder Bay is evaluated across four pillars: Reputation (ratings across multiple platforms), Verification (government licensing and WSIB), Transparency (online presence and profile completeness), and Sentiment (AI analysis of customer reviews). The result is a ProScore from 0 to 100.
Read the full methodology →Who are the top 3 plumbers in Thunder Bay?
What else should I check before hiring plumbers in Thunder Bay?
Frequently Asked Questions
Who is the best plumber in Thunder Bay?
Reliance Heating, Air Conditioning & Plumbing has the highest ProScore (72/100) among 17 plumbers in Thunder Bay, Ontario. Rankings are based on ProScore, which evaluates ratings, government licensing, WSIB coverage, and AI-analyzed customer sentiment.
How do I find a trustworthy plumber in Thunder Bay?
Look for plumbers with verified active WSIB coverage, and consistent ratings across multiple platforms. ProScore aggregates these signals into a single score from 0-100. In Thunder Bay, 0 plumbers hold Elite-tier ProScores (81+), 2 are Trusted-tier (70+), and 11 are Good-tier (54+).
Are plumbers in Thunder Bay licensed?
Plumbers in Ontario should hold valid business registration and active WSIB workers compensation coverage. ProScore verifies these credentials for every provider. Of the top 17 plumbers in Thunder Bay by ProScore, 8 carry active WSIB coverage.
How many plumbers has ProScore scored in Thunder Bay?
ProScore has scored 17 plumbers in Thunder Bay, Ontario. Each provider is evaluated using 10+ data sources, 20+ trust signals, and AI-analyzed customer reviews. Trust scores last computed between August 30, 2026 and September 19, 2026.
What's the ProScore distribution among plumbers in Thunder Bay?
Among 17 plumbers in Thunder Bay, Ontario: 0 are Elite-tier (81+), 2 are Trusted-tier (70+), and 11 are Good-tier (54+). The top 17 average a ProScore of 60/100, with Reliance Heating, Air Conditioning & Plumbing leading at 72/100.