69/100CR Score
Ranked #1 because of its Google rating and review volume: 5.0★ from 203 Google reviews, the most in Thunder Bay.
Based on 8 of 10 factors; credentials and recency not yet collected.
Best Septic Service Companies in Thunder Bay, ON (2026)
16 septic service companies ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
The short answer
- 1
Best overall in Thunder Bay: Sarah's Home Inspections Inc., CR Score 69/100; 5.0★ from 203 Google reviews; open 24/7.
- 8
Best for emergencies (open 24/7): Bud's Thunder Bay Pressure Clean Ltd, posts 24/7 hours; ranked #8 of 16.
- 7
Most-reviewed: Groundhogs™, 113 Google reviews at 4.9★, the most of 16 ranked after Sarah's Home Inspections Inc.; ranked #7.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
16 Thunder Bay septic service companies are ranked here by CR Score, from ten published factors. 3 are open 24/7, 7 open Saturdays and 4 open Sundays, based on posted hours. The median Google rating is 4.8★ across 16 rated businesses.
Top 10 septic service companies in Thunder Bay at a glance
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Sarah's Home Inspections Inc. | 69 | 5.0★ (203) | Thunder Bay | 24/7 | Overall |
| 2 | Chaschuk Enterprises Ltd | 56 | 4.7★ (13) | Thunder Bay | — | — |
| 3 | Allens Enterprises Services Inc | 56 | 4.7★ (3) | Thunder Bay | — | — |
| 4 | Northwest Drainage Solutions | 56 | 4.6★ (11) | Thunder Bay | — | — |
| 5 | Summit Contracting Group | 55 | 5.0★ (23) | Thunder Bay | Sat · Sun | — |
| 6 | Tanner Contracting & HDD Services | 55 | 4.4★ (9) | Thunder Bay | — | — |
| 7 | Groundhogs™ | 55 | 4.9★ (113) | Thunder Bay | — | Most reviews |
| 8 | Bud's Thunder Bay Pressure Clean Ltd | 55 | 5.0★ (10) | Thunder Bay | 24/7 | Emergencies |
| 9 | LTM Contracting | 55 | 5.0★ (6) | Thunder Bay | — | — |
| 10 | Superior Yard Works | 55 | 4.9★ (33) | Thunder Bay | Sat · Evenings | — |
The 16 best septic service companies in Thunder Bay, ranked
Ordered by CR Score, a 0–100 score from ten published factors. Paid placement never changes the order.
Based in Thunder Bay
56/100CR ScoreRanked #2 because of its Google rating and trade focus: 4.7★ from 13 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Thunder Bay
56/100CR ScoreRanked #3 because of its Google rating and trade focus: 4.7★ from 3 Google reviews, listed on Google as “Septic system service”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
Based in Thunder Bay
56/100CR ScoreRanked #4 because of its Google rating and trade focus: 4.6★ 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 Thunder Bay
55/100CR ScoreRanked #5 because of its Google rating and review volume: 5.0★ from 23 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Thunder Bay
55/100CR ScoreRanked #6 because of its Google rating and trade focus: 4.4★ from 9 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
#7 Groundhogs™
Based in Thunder Bay
55/100CR ScoreRanked #7 because of its Google rating and review volume: 4.9★ from 113 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Thunder Bay
55/100CR ScoreRanked #8 because of its Google rating and availability: 5.0★ from 10 Google reviews, open 24/7.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Thunder Bay
55/100CR ScoreRanked #9 because of its Google rating and trade focus: 5.0★ from 6 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Thunder Bay
55/100CR ScoreRanked #10 because of its Google rating and review volume: 4.9★ from 33 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Thunder Bay
54/100CR ScoreRanked #11 because of its Google rating and trade focus: 5.0★ from 4 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Thunder Bay
54/100CR ScoreRanked #12 because of its Google rating and trade focus: 5.0★ from 3 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Thunder Bay
53/100CR ScoreRanked #13 because of its Google rating and availability: 4.0★ from 4 Google reviews, open 24/7.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Thunder Bay
52/100CR ScoreRanked #14 because of its Google rating and trade focus: 4.6★ from 10 Google reviews, listed on Google as “Excavating contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Thunder Bay
51/100CR ScoreRanked #15 because of its Google rating and trade focus: 2.3★ from 3 Google reviews, listed on Google as “Excavating contractor”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
Based in Thunder Bay
49/100CR ScoreRanked #16 because of its Google rating and trade focus: 3.4★ from 5 Google reviews, listed on Google as “Excavating contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Also serving Thunder Bay
2 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 |
|---|---|---|
| Delta Earthworks | 5.0★ (2) | In Thunder Bay |
| PNI Contracting Ltd. | In Thunder Bay |
How we ranked Thunder Bay septic service companies
We scored 16 Thunder Bay 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 Thunder Bay 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 Thunder Bay: frequently asked questions
Who is the best septic service company in Thunder Bay?
By CR Score, the highest-ranked septic service company in Thunder Bay, ON is Sarah's Home Inspections Inc. with a CR Score of 69/100. It has 5.0★ from 203 Google reviews. It is open 24/7. Chaschuk Enterprises Ltd (#2) and Allens Enterprises Services Inc (#3) follow. We ranked 16 septic service companies on ten factors, last updated November 3, 2026.
How many septic service companies are there in Thunder Bay?
ContractorsRanked ranks 16 septic service companies serving Thunder Bay, ON. 16 of them are based in Thunder Bay; the rest serve it from nearby towns. Another 2 within 40 km are listed but not ranked yet. Counts are as of November 2026.
Which septic service companies in Thunder Bay are open 24/7?
3 ranked septic service companies in Thunder Bay post 24/7 hours. The highest-ranked are Sarah's Home Inspections Inc. (#1), Bud's Thunder Bay Pressure Clean Ltd (#8) and Thunder Bay Outdoor Services (#13). Hours come from each business's Google listing as of November 2026, so call to confirm.
Which septic service companies in Thunder Bay work on weekends?
7 of 16 ranked septic service companies post Saturday hours and 4 post Sunday hours. The highest-ranked open Saturdays are Sarah's Home Inspections Inc. (#1), Summit Contracting Group (#5) and Bud's Thunder Bay Pressure Clean Ltd (#8). Posted hours are office hours; crews may book weekend jobs separately.
What Google rating do Thunder Bay septic service companies have?
The median Google rating among 16 rated septic service companies in Thunder Bay is 4.8★, with a median of 10 reviews. Sarah's Home Inspections Inc. has the most, 203 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 Thunder Bay count in this ranking?
Yes, if they are within 40 km of the Thunder Bay 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 Thunder Bay
- November 2026: CR Scores recalculated for 16 septic service companies serving Thunder Bay.
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