61/100CR Score
Ranked #1 because of its Google rating and trade focus: 5.0★ from 21 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Best Septic Service Companies in Leominster, MA (2026)
83 septic service companies ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
The short answer
- 1
Best overall in Leominster: Curtis Septic, CR Score 61/100; 5.0★ from 21 Google reviews; open 24/7.
- 2
Best for emergencies (open 24/7): Northboro / Curtis Septic Service, posts 24/7 hours; ranked #2 of 83.
- 28
Most-reviewed: New Era Plumbing & HVAC, 1,003 Google reviews at 4.9★, the most of 83 ranked; ranked #28.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
83 Leominster septic service companies are ranked here by CR Score, from ten published factors. 24 are open 24/7, 41 open Saturdays and 27 open Sundays, based on posted hours. The median Google rating is 4.9★ across 83 rated businesses.
Top 10 septic service companies in Leominster at a glance
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Curtis Septic | 61 | 5.0★ (21) | Leominster | 24/7 | Overall |
| 2 | Northboro / Curtis Septic Service | 59 | 4.9★ (73) | Northborough, 16 mi away | 24/7 | Emergencies |
| 3 | Curtis Septic Service | 59 | 4.7★ (77) | Stow, 15 mi away | 24/7 | — |
| 4 | Fairbank Septic Pumping LLC | 59 | 4.9★ (93) | Sudbury, 21 mi away | 24/7 | — |
| 5 | Wind River Environmental | 58 | 4.9★ (854) | Hudson, 13 mi away | 24/7 | — |
| 6 | Lancaster Septic | 57 | 3.0★ (4) | Leominster | 24/7 | — |
| 7 | R M Ratta Corp | 57 | 4.9★ (204) | Fitchburg, 12 mi away | — | — |
| 8 | CSI-Culley's Septic Inc | 57 | 4.9★ (141) | Marlborough, 11 mi away | — | — |
| 9 | Watatic Septic Tank Service | 56 | 5.0★ (33) | Ashburnham, 12 mi away | — | — |
| 10 | The Chase/Harris Septic Corp. | 56 | 3.8★ (27) | Leicester, 13 mi away | 24/7 | — |
The 83 best septic service companies in Leominster, ranked
Ordered by CR Score, a 0–100 score from ten published factors. Paid placement never changes the order.
Based in Northborough, 16 mi away
59/100CR ScoreRanked #2 because of its Google rating and trade focus: 4.9★ from 73 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Stow, 15 mi away
59/100CR ScoreRanked #3 because of its Google rating and trade focus: 4.7★ from 77 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Sudbury, 21 mi away
59/100CR ScoreRanked #4 because of its Google rating and trade focus: 4.9★ from 93 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Hudson, 13 mi away
58/100CR ScoreRanked #5 because of its Google rating and review volume: 4.9★ from 854 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Leominster
57/100CR ScoreRanked #6 because of its Google rating and trade focus: 3.0★ 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 Fitchburg, 12 mi away
57/100CR ScoreRanked #7 because of its Google rating and trade focus: 4.9★ from 204 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Marlborough, 11 mi away
57/100CR ScoreRanked #8 because of its Google rating and trade focus: 4.9★ from 141 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Ashburnham, 12 mi away
56/100CR ScoreRanked #9 because of its Google rating and trade focus: 5.0★ from 33 Google reviews, listed on Google as “Septic system service”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
Based in Leicester, 13 mi away
56/100CR ScoreRanked #10 because of its Google rating and trade focus: 3.8★ from 27 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Boston, 23 mi away
56/100CR ScoreRanked #11 because of its Google rating and trade focus: 4.8★ from 32 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Charlton, 25 mi away
55/100CR ScoreRanked #12 because of its Google rating and trade focus: 5.0★ from 26 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Sterling, 8 mi away
55/100CR ScoreRanked #13 because of its Google rating and trade focus: 5.0★ from 39 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Fitchburg, 10 mi away
55/100CR ScoreRanked #14 because of its Google rating and trade focus: 5.0★ from 15 Google reviews, listed on Google as “Septic system service”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
Based in Acton, 18 mi away
55/100CR ScoreRanked #15 because of its Google rating and review volume: 4.8★ from 290 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Holden, 13 mi away
55/100CR ScoreRanked #16 because of its Google rating and review volume: 5.0★ from 133 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Millbury, 24 mi away
55/100CR ScoreRanked #17 because of its Google rating and trade focus: 5.0★ from 17 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
#18 Smith Septic
Based in Franklin, 24 mi away
55/100CR ScoreRanked #18 because of its Google rating and trade focus: 5.0★ from 17 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Fitchburg, 13 mi away
54/100CR ScoreRanked #19 because of its Google rating and trade focus: 4.9★ from 17 Google reviews, listed on Google as “Septic system service”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
Based in Gardner, 17 mi away
54/100CR ScoreRanked #20 because of its Google rating and trade focus: 5.0★ from 26 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Westford, 18 mi away
54/100CR ScoreRanked #21 because of its Google rating and review volume: 5.0★ from 111 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Acton, 12 mi away
54/100CR ScoreRanked #22 because of its Google rating and trade focus: 4.9★ from 37 Google reviews, listed on Google as “General contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Westford, 19 mi away
54/100CR ScoreRanked #23 because of its Google rating and trade focus: 4.4★ from 20 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Fitchburg, 14 mi away
53/100CR ScoreRanked #24 because of its Google rating and trade focus: 4.9★ from 38 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
#25 G T Smith Jr Inc
Based in Westminster, 6 mi away
53/100CR ScoreRanked #25 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.
Septic service companies ranked #26 to #50
#1 to #25 are shown in full above. Here are #26 to #50, in CR Score order; each links to its profile. We publish the top 50 of 83 ranked septic service companies here; the rest are on their profiles.
Also serving Leominster
20 more septic service companies within 25 mi that we can't rank yet: too few reviews, or a trade we couldn't confirm. Listed A to Z.
| Business | Google rating | Distance |
|---|---|---|
| American Sewerage Septic Tanks | 3.0★ (2) | 24 mi |
| Beals & Sons Inc. - Construction Company | 5.0★ (1) | 16 mi |
| Borough Sewer Services | 4.0★ (1) | 18 mi |
| Cutler Contracting, Inc. | 5.0★ (1) | 20 mi |
| David Favreau Construction & Septic Services | 5.0★ (2) | 8 mi |
| Digz Excavating & Construction | 5.0★ (1) | 23 mi |
| E A Comeau Septic | 5.0★ (1) | 18 mi |
| G. Nichols Construction Co., Inc | 5.0★ (2) | 15 mi |
| Groundscapes Inc. | 5.0★ (2) | 21 mi |
| High Country Civil Engineering, LLC | 5.0★ (1) | 15 mi |
| Land Engineering & Envrmntl | 5.0★ (2) | 20 mi |
| Mark Santora PE Inc | 5.0★ (2) | 22 mi |
| NE Excavating | 6 mi | |
| R Gustafson Sewer & Drain | 3.0★ (2) | 22 mi |
| R.E Barrows Septic Service & Construction | 5.0★ (1) | 17 mi |
| Rotti Construction Co | 5.0★ (1) | 10 mi |
| Septic-Tech Inspector | 5.0★ (1) | 22 mi |
| Sewer Works | 5.0★ (2) | 23 mi |
| Title 5 Inspection | 5.0★ (1) | In Leominster |
| Trinity Industries Corporation | 5.0★ (1) | 24 mi |
How we ranked Leominster septic service companies
We scored 83 Leominster 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 2, 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 Leominster 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 Leominster: frequently asked questions
Who is the best septic service company in Leominster?
By CR Score, the highest-ranked septic service company in Leominster, MA is Curtis Septic with a CR Score of 61/100. It has 5.0★ from 21 Google reviews. It is open 24/7. Northboro / Curtis Septic Service (#2) and Curtis Septic Service (#3) follow. We ranked 83 septic service companies on ten factors, last updated November 2, 2026.
How many septic service companies are there in Leominster?
ContractorsRanked ranks 83 septic service companies serving Leominster, MA. 3 of them are based in Leominster; the rest serve it from nearby towns. Another 20 within 25 mi are listed but not ranked yet. Counts are as of November 2026.
Which septic service companies in Leominster are open 24/7?
24 ranked septic service companies in Leominster post 24/7 hours. The highest-ranked are Curtis Septic (#1), Northboro / Curtis Septic Service (#2) and Curtis Septic Service (#3). Hours come from each business's Google listing as of November 2026, so call to confirm.
Which septic service companies in Leominster work on weekends?
41 of 83 ranked septic service companies post Saturday hours and 27 post Sunday hours. The highest-ranked open Saturdays are Curtis Septic (#1), Northboro / Curtis Septic Service (#2) and Curtis Septic Service (#3). Posted hours are office hours; crews may book weekend jobs separately.
What Google rating do Leominster septic service companies have?
The median Google rating among 83 rated septic service companies in Leominster is 4.9★, with a median of 17 reviews. New Era Plumbing & HVAC has the most, 1,003 reviews, and ranks #28. 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 Leominster count in this ranking?
Yes, if they are within 25 mi of the Leominster city center, 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 Leominster
- November 2026: CR Scores recalculated for 83 septic service companies serving Leominster.
More septic service companies and Leominster pages
Septic service companies near Leominster
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Other trades in Leominster
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