64/100CR Score
Ranked #1 because of its Google rating and trade focus: 5.0★ from 382 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 Millbury, MA (2026)
90 septic service companies ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
The short answer
- 1
Best overall in Millbury: JL Darling Septic Tank Pumping, CR Score 64/100; 5.0★ from 382 Google reviews; open 24/7.
- 3
Best for emergencies (open 24/7): Blackstone Septic Service, posts 24/7 hours; ranked #3 of 90.
- 7
Most-reviewed: Wind River Environmental, 854 Google reviews at 4.9★, the most of 90 ranked; ranked #7.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
90 Millbury septic service companies are ranked here by CR Score, from ten published factors. 28 are open 24/7, 51 open Saturdays and 32 open Sundays, based on posted hours. The median Google rating is 4.9★ across 90 rated businesses.
Top 10 septic service companies in Millbury at a glance
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | JL Darling Septic Tank Pumping | 64 | 5.0★ (382) | Uxbridge, 13 mi away | 24/7 | Overall |
| 2 | Grant's Septic Techs | 63 | 5.0★ (590) | Worcester, 7 mi away | Sat | — |
| 3 | Blackstone Septic Service | 61 | 5.0★ (17) | Millbury | 24/7 | Emergencies |
| 4 | Northboro / Curtis Septic Service | 61 | 4.9★ (73) | Northborough, 11 mi away | 24/7 | — |
| 5 | DownEast Title V Inspections, LLC | 60 | 5.0★ (47) | Haverhill, 12 mi away | 24/7 | — |
| 6 | Fairbank Septic Pumping LLC | 59 | 4.9★ (93) | Sudbury, 21 mi away | 24/7 | — |
| 7 | Wind River Environmental | 58 | 4.9★ (854) | Hudson, 14 mi away | 24/7 | Most reviews |
| 8 | Helgerson's Environmental & Septic | 58 | 4.9★ (105) | Charlton, 8 mi away | 24/7 | — |
| 9 | ADC Septic | 58 | 4.7★ (53) | Blackstone, 16 mi away | 24/7 | — |
| 10 | Dumont Septic Pumping | 58 | 5.0★ (26) | Charlton, 16 mi away | 24/7 | — |
The 90 best septic service companies in Millbury, ranked
Ordered by CR Score, a 0–100 score from ten published factors. Paid placement never changes the order.
Based in Worcester, 7 mi away
63/100CR ScoreRanked #2 because of its Google rating and trade focus: 5.0★ from 590 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Millbury
61/100CR ScoreRanked #3 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 Northborough, 11 mi away
61/100CR ScoreRanked #4 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 Haverhill, 12 mi away
60/100CR ScoreRanked #5 because of its Google rating and trade focus: 5.0★ 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 Sudbury, 21 mi away
59/100CR ScoreRanked #6 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, 14 mi away
58/100CR ScoreRanked #7 because of its Google rating and review volume: 4.9★ from 854 Google reviews, the most in Millbury.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Charlton, 8 mi away
58/100CR ScoreRanked #8 because of its Google rating and trade focus: 4.9★ from 105 Google reviews, listed on Google as “Plumber”.
Based on 8 of 10 factors; credentials and recency not yet collected.
#9 ADC Septic
Based in Blackstone, 16 mi away
58/100CR ScoreRanked #9 because of its Google rating and trade focus: 4.7★ from 53 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Charlton, 16 mi away
58/100CR ScoreRanked #10 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 Sutton, 2 mi away
58/100CR ScoreRanked #11 because of its Google rating and trade focus: 4.6★ from 105 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Stow, 22 mi away
57/100CR ScoreRanked #12 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.
#13 Smith Septic
Based in Franklin, 14 mi away
57/100CR ScoreRanked #13 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 Blackstone, 15 mi away
56/100CR ScoreRanked #14 because of its Google rating and trade focus: 4.7★ from 329 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Holliston, 17 mi away
56/100CR ScoreRanked #15 because of its Google rating and trade focus: 4.5★ from 24 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Charlton, 12 mi away
56/100CR ScoreRanked #16 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 Marlborough, 15 mi away
56/100CR ScoreRanked #17 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 Leicester, 7 mi away
56/100CR ScoreRanked #18 because of its Google rating and trade focus: 4.8★ from 16 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, 14 mi away
56/100CR ScoreRanked #19 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 Holliston, 15 mi away
56/100CR ScoreRanked #20 because of its Google rating and trade focus: 5.0★ from 98 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Haverhill, 12 mi away
55/100CR ScoreRanked #21 because of its Google rating and trade focus: 4.9★ from 30 Google reviews, listed on Google as “Plumber”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Auburn, 4 mi away
54/100CR ScoreRanked #22 because of its Google rating and trade focus: 5.0★ 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 Charlton, 8 mi away
54/100CR ScoreRanked #23 because of its Google rating and trade focus: 4.5★ from 40 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Millbury
54/100CR ScoreRanked #24 because of its Google rating and trade focus: 3.4★ from 5 Google reviews, listed on Google as “Plumber”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Uxbridge, 13 mi away
54/100CR ScoreRanked #25 because of its Google rating and trade focus: 5.0★ from 17 Google reviews, listed on Google as “Plumber”.
Based on 8 of 10 factors; credentials and recency 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 90 ranked septic service companies here; the rest are on their profiles.
Also serving Millbury
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) | 8 mi |
| Audet Septic Services | 5.0★ (1) | 18 mi |
| Beals & Sons Inc. - Construction Company | 5.0★ (1) | 10 mi |
| CDM Septic & Construction | 1.0★ (1) | 17 mi |
| Cutler Contracting, Inc. | 5.0★ (1) | 22 mi |
| David Favreau Construction & Septic Services | 5.0★ (2) | 15 mi |
| E A Comeau Septic | 5.0★ (1) | 24 mi |
| G. Nichols Construction Co., Inc | 5.0★ (2) | 24 mi |
| Groundscapes Inc. | 5.0★ (2) | 6 mi |
| Hilltop Contractors, LLC | 5.0★ (2) | 25 mi |
| L H Sewerage Inc | 5.0★ (2) | 8 mi |
| M G Stanick Septic Pumping Services | 4.5★ (2) | 9 mi |
| Mark Santora PE Inc | 5.0★ (2) | 4 mi |
| P & M Asphalt Services Inc | 1.0★ (1) | 3 mi |
| R Gustafson Sewer & Drain | 3.0★ (2) | In Millbury |
| R.E Barrows Septic Service & Construction | 5.0★ (1) | 6 mi |
| Rotti Construction Co | 5.0★ (1) | 13 mi |
| Septic-Tech Inspector | 5.0★ (1) | 9 mi |
| Slims & Berthiaume Sewer Service Inc | 5.0★ (2) | 25 mi |
| Trinity Industries Corporation | 5.0★ (1) | 14 mi |
How we ranked Millbury septic service companies
We scored 90 Millbury 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 Millbury 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 Millbury: frequently asked questions
Who is the best septic service company in Millbury?
By CR Score, the highest-ranked septic service company in Millbury, MA is JL Darling Septic Tank Pumping with a CR Score of 64/100. It has 5.0★ from 382 Google reviews. It is open 24/7. Grant's Septic Techs (#2) and Blackstone Septic Service (#3) follow. We ranked 90 septic service companies on ten factors, last updated November 3, 2026.
How many septic service companies are there in Millbury?
ContractorsRanked ranks 90 septic service companies serving Millbury, MA. 2 of them are based in Millbury; 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 Millbury are open 24/7?
28 ranked septic service companies in Millbury post 24/7 hours. The highest-ranked are JL Darling Septic Tank Pumping (#1), Blackstone Septic Service (#3) and Northboro / Curtis Septic Service (#4). Hours come from each business's Google listing as of November 2026, so call to confirm.
Which septic service companies in Millbury work on weekends?
51 of 90 ranked septic service companies post Saturday hours and 32 post Sunday hours. The highest-ranked open Saturdays are JL Darling Septic Tank Pumping (#1), Grant's Septic Techs (#2) and Blackstone Septic Service (#3). Posted hours are office hours; crews may book weekend jobs separately.
What Google rating do Millbury septic service companies have?
The median Google rating among 90 rated septic service companies in Millbury is 4.9★, with a median of 17 reviews. Wind River Environmental has the most, 854 reviews, and ranks #7. 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 Millbury count in this ranking?
Yes, if they are within 25 mi of the Millbury 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 Millbury
- November 2026: CR Scores recalculated for 90 septic service companies serving Millbury.
More septic service companies and Millbury pages
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