Top 50 of 144 plumbers, in emergency orderUpdated 0 paid placements in this rankingHow we rank
24 of the 50 plumbers on this list post 24/7 hours. 24/7 businesses come first, then same-day, each ranked by CR Score with availability weighted higher.
#1 for emergency plumbing in Thorold: Reliance Heating, Air Conditioning & Plumbing, open 24/7.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
| Rank | Business | CR Score | Google rating | Based in | Hours |
|---|---|---|---|---|---|
| 1 | Reliance Heating, Air Conditioning & Plumbing | 90 | 4.8★ (2,986) | St. Catharines, 6 km away | 24/7 |
| 2 | PLUMBER ON DEMAND of THOROLD, ON | 89 | 5.0★ (115) | Fort Erie, 13 km away | 24/7 |
| 3 | Roto-Rooter Plumbing & Water Cleanup | 89 | 4.8★ (2,489) | Buffalo, 36 km away | 24/7 |
| 4 | Plumr Plumbing & Heating | 88 | 4.9★ (121) | Welland, 15 km away | 24/7 |
| 5 | Cellino Plumbing, Heating, Cooling & Electric | 88 | 4.9★ (1,036) | Buffalo, 39 km away | 24/7 |
| 6 | All Pro Plumbing | 88 | 4.9★ (337) | Tonawanda, 29 km away | 24/7 |
| 7 | PLUMBER ON DEMAND of NIAGARA REGION, ON | 88 | 4.6★ (186) | Fort Erie, 13 km away | 24/7 |
| 8 | Mr. Furnace Heating and Air Conditioning | 87 | 4.8★ (2,672) | St. Catharines, 7 km away | 24/7 |
| 9 | Sewer pro plumbing | 87 | 5.0★ (160) | Fort Erie, 30 km away | 24/7 |
| 10 | Roy's Plumbing, Heating, Cooling & Electrical | 87 | 4.8★ (3,074) | Tonawanda, 28 km away | 24/7 |
24/7 hours mean the business says its phone is answered around the clock. Arrival time depends on where the crew is. Ask for an arrival window when you call.
#1Reliance Heating, Air Conditioning & Plumbing
Open 24/7 · 4.8 from 2,986 Google reviews
#2PLUMBER ON DEMAND of THOROLD, ON
Open 24/7 · 5.0 from 115 Google reviews
#3Roto-Rooter Plumbing & Water Cleanup
Open 24/7 · 4.8 from 2,489 Google reviews
Open 24/7 · 4.9 from 121 Google reviews
#5Cellino Plumbing, Heating, Cooling & Electric
Open 24/7 · 4.9 from 1,036 Google reviews
Open 24/7 · 4.9 from 337 Google reviews
#7PLUMBER ON DEMAND of NIAGARA REGION, ON
Open 24/7 · 4.6 from 186 Google reviews
#8Mr. Furnace Heating and Air Conditioning
Open 24/7 · 4.8 from 2,672 Google reviews
24/7 first, then same-day service, then the rest. Each group is in CR Score order on emergency weights. The full ranking of all 144 is on the plumbers page.
Ranked #1 in Thorold
Based in St. Catharines, 6 km away
Ranked #1 because of its Google rating and availability: 4.8★ from 2,986 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Fort Erie, 13 km away
Ranked #2 because of its Google rating and availability: 5.0★ from 115 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Buffalo, 36 km away
Ranked #3 because of its Google rating and availability: 4.8★ from 2,489 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Welland, 15 km away
Ranked #4 because of its Google rating and availability: 4.9★ from 121 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Buffalo, 39 km away
Ranked #5 because of its Google rating and availability: 4.9★ from 1,036 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Tonawanda, 29 km away
Ranked #6 because of its Google rating and availability: 4.9★ from 337 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Fort Erie, 13 km away
Ranked #7 because of its Google rating and availability: 4.6★ from 186 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in St. Catharines, 7 km away
Ranked #8 because of its Google rating and availability: 4.8★ from 2,672 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Fort Erie, 30 km away
Ranked #9 because of its Google rating and availability: 5.0★ from 160 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Tonawanda, 28 km away
Ranked #10 because of its Google rating and availability: 4.8★ from 3,074 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Welland, 16 km away
Ranked #11 because of its Google rating and availability: 4.7★ from 87 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Buffalo, 34 km away
Ranked #12 because of its Google rating and availability: 4.9★ from 3,978 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in St. Catharines, 9 km away
Ranked #13 because of its Google rating and availability: 4.6★ from 2,788 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in St. Catharines, 6 km away
Ranked #14 because of its Google rating and availability: 4.4★ from 14 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Grand Island, 23 km away
Ranked #15 because of its Google rating and availability: 4.9★ from 45 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Port Colborne, 24 km away
Ranked #16 because of its Google rating and availability: 5.0★ from 35 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Fort Erie, 27 km away
Ranked #17 because of its Google rating and availability: 4.9★ from 51 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in St. Catharines, 8 km away
Ranked #18 because of its Google rating and availability: 5.0★ from 6 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Grand Island, 19 km away
Ranked #19 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 Welland, 17 km away
Ranked #20 because of its Google rating and availability: 5.0★ from 11 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in St. Catharines, 9 km away
Ranked #21 because of its Google rating and availability: 4.9★ from 60 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Buffalo, 37 km away
Ranked #22 because of its Google rating and review volume: 4.9★ from 5,592 Google reviews, 5,592 Google reviews.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Port Colborne, 13 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 Cheektowaga, 39 km away
Ranked #24 because of its Google rating and availability: 5.0★ from 65 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Thorold
Ranked #25 because of its Google rating and trade focus: 5.0★ from 44 Google reviews, listed on Google as “Plumber”.
Based on 5 of 8 factors; credentials, recency and availability not yet collected.
#1 to #25 are shown in full above. Here are #26 to #50, in CR Score order; each links to its profile.
Emergency lists move 10 points of the CR Score from reputation to availability: 25% and 20%. Availability credits 24/7 hours, same-day service, weekend hours and weekly open hours. 24/7 plumbers are listed first, then same-day, then the rest; ranks follow that order. Paid placement never changes a rank.
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 |
|---|---|---|
| Reputation | 25% | Bayesian-adjusted Google star rating |
| Credentials | 15% | Active state license 0.6, bond 0.2, workers’ comp 0.2 |
| Review volume | 10% | log10(reviews + 1) against the list maximum |
| Recency | 10% | Share of reviews from the last 12 months |
| Availability | 20% | Weekly open hours, Saturday, Sunday, 24/7 or same-day |
| Trade focus | 10% | Google main category 1.0, business name 0.7, additional category 0.5 |
| Proximity | 5% | 1.0 when based in the city, falling to 0 at the trade’s radius |
| Completeness | 5% | Website, photos, description, hours, claimed profile (0.2 each) |