66/100CR Score
Ranked #1 because of its Google rating and review volume: 4.9★ from 846 Google reviews, the most in Holliston.
Based on 8 of 10 factors; credentials and recency not yet collected.
Best Septic Service Companies in Holliston, MA (2026)
114 septic service companies ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
The short answer
- 1
Best overall in Holliston: Wind River Environmental of Walpole, MA, CR Score 66/100; 4.9★ from 846 Google reviews; open 24/7.
- 2
Best for emergencies (open 24/7): JL Darling Septic Tank Pumping, posts 24/7 hours; ranked #2 of 114.
- 3
Most-reviewed: Grant's Septic Techs, 590 Google reviews at 5.0★, the most of 114 ranked after Wind River Environmental of Walpole, MA; ranked #3.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
114 Holliston septic service companies are ranked here by CR Score, from ten published factors. 37 are open 24/7, 64 open Saturdays and 43 open Sundays, based on posted hours. The median Google rating is 4.9★ across 114 rated businesses.
Top 10 septic service companies in Holliston at a glance
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Wind River Environmental of Walpole, MA | 66 | 4.9★ (846) | Walpole, 10 mi away | 24/7 | Overall |
| 2 | JL Darling Septic Tank Pumping | 63 | 5.0★ (382) | Uxbridge, 15 mi away | 24/7 | Emergencies |
| 3 | Grant's Septic Techs | 62 | 5.0★ (590) | Worcester, 11 mi away | Sat | Most reviews |
| 4 | Fairbank Septic Pumping LLC | 61 | 4.9★ (93) | Sudbury, 11 mi away | 24/7 | — |
| 5 | Home Town Pumping | 61 | 4.9★ (366) | Foxborough, 14 mi away | — | — |
| 6 | Rodenhiser Excavating, Septic & Drains and Builders | 61 | 4.5★ (24) | Holliston | 24/7 | — |
| 7 | Northboro / Curtis Septic Service | 60 | 4.9★ (73) | Northborough, 14 mi away | 24/7 | — |
| 8 | Smith Septic | 60 | 5.0★ (17) | Franklin, 4 mi away | 24/7 | — |
| 9 | Holliston Sewer Service | 59 | 5.0★ (98) | Holliston | — | — |
| 10 | ADC Septic | 59 | 4.7★ (53) | Blackstone, 14 mi away | 24/7 | — |
The 114 best septic service companies in Holliston, ranked
Ordered by CR Score, a 0–100 score from ten published factors. Paid placement never changes the order.
Based in Uxbridge, 15 mi away
63/100CR ScoreRanked #2 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.
Based in Worcester, 11 mi away
62/100CR ScoreRanked #3 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 Sudbury, 11 mi away
61/100CR 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 Foxborough, 14 mi away
61/100CR ScoreRanked #5 because of its Google rating and trade focus: 4.9★ from 366 Google reviews, listed on Google as “Septic system service”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
Based in Holliston
61/100CR ScoreRanked #6 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 Northborough, 14 mi away
60/100CR ScoreRanked #7 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.
#8 Smith Septic
Based in Franklin, 4 mi away
60/100CR ScoreRanked #8 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 Holliston
59/100CR ScoreRanked #9 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.
#10 ADC Septic
Based in Blackstone, 14 mi away
59/100CR ScoreRanked #10 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 Stow, 16 mi away
59/100CR ScoreRanked #11 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 Haverhill, 17 mi away
59/100CR ScoreRanked #12 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 Arlington, 25 mi away
57/100CR ScoreRanked #13 because of its Google rating and review volume: 4.9★ from 493 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Boston, 18 mi away
57/100CR ScoreRanked #14 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.
#15 Rhino Rooter
Based in Boston, 18 mi away
57/100CR ScoreRanked #15 because of its Google rating and trade focus: 5.0★ from 25 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Millbury, 18 mi away
56/100CR ScoreRanked #16 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 Wrentham, 11 mi away
56/100CR ScoreRanked #17 because of its Google rating and trade focus: 4.3★ from 36 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in South Boston, 20 mi away
56/100CR ScoreRanked #18 because of its Google rating and trade focus: 5.0★ from 42 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Framingham Center, 6 mi away
55/100CR ScoreRanked #19 because of its Google rating and trade focus: 4.5★ from 12 Google reviews, listed on Google as “Septic system service”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
#20 Curtis Septic
Based in Leominster, 24 mi away
55/100CR ScoreRanked #20 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.
Based in Marlborough, 18 mi away
55/100CR ScoreRanked #21 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.
#22 Waste Warriors
Based in South Boston, 25 mi away
55/100CR ScoreRanked #22 because of its Google rating and trade focus: 5.0★ 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 Blackstone, 20 mi away
55/100CR ScoreRanked #23 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 Acton, 17 mi away
55/100CR ScoreRanked #24 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 Sudbury, 12 mi away
55/100CR ScoreRanked #25 because of its Google rating and trade focus: 4.4★ from 12 Google reviews, listed on Google as “Septic system service”.
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 114 ranked septic service companies here; the rest are on their profiles.
Also serving Holliston
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 |
|---|---|---|
| All Clean Inc | 3.0★ (2) | 22 mi |
| American Sewerage Septic Tanks | 3.0★ (2) | 25 mi |
| AW Pump Pawtucket, RI - Sewer Pump & Well Tank Installation Service | 5.0★ (2) | 22 mi |
| Beals & Sons Inc. - Construction Company | 5.0★ (1) | 14 mi |
| CDM Septic & Construction | 1.0★ (1) | 11 mi |
| Cutler Contracting, Inc. | 5.0★ (1) | 13 mi |
| David Favreau Construction & Septic Services | 5.0★ (2) | 22 mi |
| G. Nichols Construction Co., Inc | 5.0★ (2) | 19 mi |
| Groundscapes Inc. | 5.0★ (2) | 23 mi |
| JPAC Enterprises, LLC | 5.0★ (1) | 9 mi |
| L H Sewerage Inc | 5.0★ (2) | 24 mi |
| M G Stanick Septic Pumping Services | 4.5★ (2) | 18 mi |
| Mark Santora PE Inc | 5.0★ (2) | 13 mi |
| NorthEast Classic Builders | 1.0★ (1) | 11 mi |
| P & M Asphalt Services Inc | 1.0★ (1) | 16 mi |
| R Gustafson Sewer & Drain | 3.0★ (2) | 16 mi |
| Septic-Tech Inspector | 5.0★ (1) | 9 mi |
| Trinity Industries Corporation | 5.0★ (1) | 4 mi |
| Trufant Industries, Inc. | 5.0★ (2) | 13 mi |
| United Rentals - Reliable Onsite Services | 5.0★ (2) | 22 mi |
How we ranked Holliston septic service companies
We scored 114 Holliston 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 Holliston 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 Holliston: frequently asked questions
Who is the best septic service company in Holliston?
By CR Score, the highest-ranked septic service company in Holliston, MA is Wind River Environmental of Walpole, MA with a CR Score of 66/100. It has 4.9★ from 846 Google reviews. It is open 24/7. JL Darling Septic Tank Pumping (#2) and Grant's Septic Techs (#3) follow. We ranked 114 septic service companies on ten factors, last updated November 2, 2026.
How many septic service companies are there in Holliston?
ContractorsRanked ranks 114 septic service companies serving Holliston, MA. 3 of them are based in Holliston; 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 Holliston are open 24/7?
37 ranked septic service companies in Holliston post 24/7 hours. The highest-ranked are Wind River Environmental of Walpole, MA (#1), JL Darling Septic Tank Pumping (#2) and Fairbank Septic Pumping LLC (#4). Hours come from each business's Google listing as of November 2026, so call to confirm.
Which septic service companies in Holliston work on weekends?
64 of 114 ranked septic service companies post Saturday hours and 43 post Sunday hours. The highest-ranked open Saturdays are Wind River Environmental of Walpole, MA (#1), JL Darling Septic Tank Pumping (#2) and Grant's Septic Techs (#3). Posted hours are office hours; crews may book weekend jobs separately.
What Google rating do Holliston septic service companies have?
The median Google rating among 114 rated septic service companies in Holliston is 4.9★, with a median of 17 reviews. Wind River Environmental of Walpole, MA has the most, 846 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 Holliston count in this ranking?
Yes, if they are within 25 mi of the Holliston 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 Holliston
- November 2026: CR Scores recalculated for 114 septic service companies serving Holliston.
More septic service companies and Holliston pages
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