61/100CR Score
Ranked #1 because of its Google rating and review volume: 4.8★ from 2,083 Google reviews, the most in London.
Based on 8 of 10 factors; credentials and recency not yet collected.
Best Septic Service Companies in London, ON (2026)
25 septic service companies ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
The short answer
- 1
Best overall in London: Mr. Rooter Plumbing of London ON, CR Score 61/100; 4.8★ from 2,083 Google reviews; open 24/7.
- 2
Best for emergencies (open 24/7): DrainCam Plumbing, posts 24/7 hours; ranked #2 of 25.
- 2
Most-reviewed: DrainCam Plumbing, 329 Google reviews at 4.9★, the most of 25 ranked after Mr. Rooter Plumbing of London ON; ranked #2.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
25 London septic service companies are ranked here by CR Score, from ten published factors. 11 are open 24/7, 14 open Saturdays and 12 open Sundays, based on posted hours. The median Google rating is 4.9★ across 25 rated businesses.
Top 10 septic service companies in London at a glance
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Mr. Rooter Plumbing of London ON | 61 | 4.8★ (2,083) | London | 24/7 | Overall |
| 2 | DrainCam Plumbing | 59 | 4.9★ (329) | London | 24/7 | Emergencies, Most reviews |
| 3 | Norm's Environmental Service | 59 | 4.9★ (68) | Ingersoll, 23 km away | 24/7 | — |
| 4 | Jumbo Plumbing | 59 | 4.9★ (318) | London | 24/7 | — |
| 5 | M Jones Limited | 58 | 5.0★ (12) | London | Sat · Sun · Evenings | — |
| 6 | Best Plumbing and Drainage Contractors | 56 | 4.8★ (85) | London | 24/7 | — |
| 7 | Hy-Pro Plumbing & Drain Cleaning of London ON | 56 | 4.6★ (132) | London | 24/7 | — |
| 8 | ESI Group | 56 | 4.9★ (248) | St. Thomas, 24 km away | — | — |
| 9 | Jumbo Plumbing | 55 | 5.0★ (35) | London | 24/7 | — |
| 10 | Choice | 55 | 5.0★ (14) | London | — | — |
The 25 best septic service companies in London, ranked
Ordered by CR Score, a 0–100 score from ten published factors. Paid placement never changes the order.
Based in London
59/100CR ScoreRanked #2 because of its Google rating and review volume: 4.9★ from 329 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Ingersoll, 23 km away
59/100CR ScoreRanked #3 because of its Google rating and trade focus: 4.9★ from 68 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in London
59/100CR ScoreRanked #4 because of its Google rating and review volume: 4.9★ from 318 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in London
58/100CR ScoreRanked #5 because of its Google rating and trade focus: 5.0★ from 12 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in London
56/100CR ScoreRanked #6 because of its Google rating and review volume: 4.8★ from 85 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in London
56/100CR ScoreRanked #7 because of its Google rating and review volume: 4.6★ from 132 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
#8 ESI Group
Based in St. Thomas, 24 km away
56/100CR ScoreRanked #8 because of its Google rating and trade focus: 4.9★ from 248 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in London
55/100CR ScoreRanked #9 because of its Google rating and availability: 5.0★ from 35 Google reviews, open 24/7.
Based on 8 of 10 factors; credentials and recency not yet collected.
#10 Choice
Based in London
55/100CR ScoreRanked #10 because of its Google rating and trade focus: 5.0★ from 14 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in St. Thomas, 24 km away
54/100CR ScoreRanked #11 because of its Google rating and trade focus: 5.0★ from 5 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in London
54/100CR ScoreRanked #12 because of its Google rating and trade focus: 4.7★ 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 London
54/100CR ScoreRanked #13 because of its Google rating and trade focus: 4.9★ from 8 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Dorchester, 12 km away
54/100CR ScoreRanked #14 because of its Google rating and trade focus: 4.6★ from 47 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Norfolk County, 37 km away
54/100CR ScoreRanked #15 because of its Google rating and trade focus: 5.0★ from 11 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in St. Thomas, 23 km away
53/100CR ScoreRanked #16 because of its Google rating and review volume: 5.0★ from 78 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in London
53/100CR ScoreRanked #17 because of its Google rating and availability: 4.6★ from 11 Google reviews, open 24/7.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in St. Thomas, 22 km away
52/100CR ScoreRanked #18 because of its Google rating and trade focus: 4.9★ from 23 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Ingersoll, 33 km away
52/100CR ScoreRanked #19 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 St. Thomas, 30 km away
51/100CR ScoreRanked #20 because of its Google rating and trade focus: 5.0★ from 7 Google reviews, listed on Google as “Septic system service”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
Based in Ingersoll, 33 km away
50/100CR ScoreRanked #21 because of its Google rating and trade focus: 4.9★ 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 Norfolk County, 34 km away
49/100CR ScoreRanked #22 because of its Google rating and trade focus: 5.0★ from 3 Google reviews, listed on Google as “Septic system service”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
#23 Lake Services
Based in St. Thomas, 24 km away
49/100CR ScoreRanked #23 because of its Google rating and trade focus: 3.4★ from 7 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Norfolk County, 34 km away
45/100CR ScoreRanked #24 because of its Google rating and trade focus: 5.0★ from 11 Google reviews, listed on Google as “Excavating contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Norfolk County, 40 km away
43/100CR ScoreRanked #25 because of its Google rating and trade focus: 4.6★ from 33 Google reviews, listed on Google as “Excavating contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Also serving London
11 more septic service companies within 40 km that we can't rank yet: too few reviews, or a trade we couldn't confirm. Listed A to Z.
| Business | Google rating | Distance |
|---|---|---|
| Abc Sanitation | 5.0★ (1) | In London |
| Action Drainage and Plumbing | In London | |
| Bowden Excavating Inc. | 5.0★ (20) | In London |
| Discount Drain | 4.7★ (148) | In London |
| EcoPure Plumbing | 5.0★ (5) | In London |
| Edgar Excavating & Haulage Inc. | 5.0★ (3) | In London |
| MacCallum Pumping Solutions | 25 km | |
| Plumber Ingersoll | 29 km | |
| Sanitary Sewer Cleaning | 5.0★ (2) | In London |
| South West Septics | 5.0★ (1) | 38 km |
| Wall-Ex Inc | 4.0★ (2) | 38 km |
How we ranked London septic service companies
We scored 25 London 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 London 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 London: frequently asked questions
Who is the best septic service company in London?
By CR Score, the highest-ranked septic service company in London, ON is Mr. Rooter Plumbing of London ON with a CR Score of 61/100. It has 4.8★ from 2,083 Google reviews. It is open 24/7. DrainCam Plumbing (#2) and Norm's Environmental Service (#3) follow. We ranked 25 septic service companies on ten factors, last updated November 3, 2026.
How many septic service companies are there in London?
ContractorsRanked ranks 25 septic service companies serving London, ON. 11 of them are based in London; the rest serve it from nearby towns. Another 11 within 40 km are listed but not ranked yet. Counts are as of November 2026.
Which septic service companies in London are open 24/7?
11 ranked septic service companies in London post 24/7 hours. The highest-ranked are Mr. Rooter Plumbing of London ON (#1), DrainCam Plumbing (#2) and Norm's Environmental Service (#3). Hours come from each business's Google listing as of November 2026, so call to confirm.
Which septic service companies in London work on weekends?
14 of 25 ranked septic service companies post Saturday hours and 12 post Sunday hours. The highest-ranked open Saturdays are Mr. Rooter Plumbing of London ON (#1), DrainCam Plumbing (#2) and Norm's Environmental Service (#3). Posted hours are office hours; crews may book weekend jobs separately.
What Google rating do London septic service companies have?
The median Google rating among 25 rated septic service companies in London is 4.9★, with a median of 18 reviews. Mr. Rooter Plumbing of London ON has the most, 2,083 reviews, and ranks #1. 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 London count in this ranking?
Yes, if they are within 40 km of the London city centre, 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 London
- November 2026: CR Scores recalculated for 25 septic service companies serving London.
More septic service companies and London pages
Septic service companies near London
- Septic service companies in St. Thomas, ON24 ranked
- Septic service companies in Ingersoll, ON35 ranked
- Septic service companies in Woodstock, ON31 ranked
- Septic service companies in Stratford, ON17 ranked
- Septic service companies in Lambton Shores, ON7 ranked
- Septic service companies in New Hamburg, ON32 ranked
- Septic service companies in Norfolk County, ON36 ranked
- Septic service companies in Paris, ON57 ranked
- Septic service companies in Brant, ON53 ranked
- Septic service companies in Kitchener, ON40 ranked
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