62/100CR Score
Ranked #1 because of its Google rating and review volume: 4.9★ from 156 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Best Septic Service Companies in Somersworth, NH (2026)
26 septic service companies ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
The short answer
- 1
Best overall in Somersworth: Seacoast Sewer & Drain, Inc., CR Score 62/100; 4.9★ from 156 Google reviews; open 24/7.
- 2
Best for emergencies (open 24/7): A-1 Septic Tank Services, posts 24/7 hours; ranked #2 of 26.
- 3
Most-reviewed: Hunts Septic Service, 165 Google reviews at 4.9★, the most of 26 ranked; ranked #3.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
26 Somersworth septic service companies are ranked here by CR Score, from ten published factors. 6 are open 24/7, 9 open Saturdays and 7 open Sundays, based on posted hours. The median Google rating is 4.8★ across 26 rated businesses.
Top 10 septic service companies in Somersworth at a glance
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Seacoast Sewer & Drain, Inc. | 62 | 4.9★ (156) | Eliot, 10 mi away | 24/7 | Overall |
| 2 | A-1 Septic Tank Services | 61 | 4.7★ (44) | Sanford, 13 mi away | 24/7 | Emergencies |
| 3 | Hunts Septic Service | 61 | 4.9★ (165) | Rochester, 9 mi away | — | Most reviews |
| 4 | LaPierre Septic | 61 | 4.6★ (134) | Rochester, 12 mi away | — | — |
| 5 | Seacoast Septic | 59 | 5.0★ (13) | Portsmouth, 13 mi away | 24/7 | — |
| 6 | Stoney Road Septic | 59 | 5.0★ (143) | Sanford, 18 mi away | — | — |
| 7 | Roland's Sewer Service | 58 | 4.6★ (9) | Manchester, 11 mi away | 24/7 | — |
| 8 | Top Dog Sewer & Drain | 57 | 4.9★ (58) | Chester, 19 mi away | 24/7 | — |
| 9 | McKenna Septic Service | 56 | 4.8★ (30) | Barrington, 8 mi away | — | — |
| 10 | A-1 Environmental Services | 56 | 5.0★ (13) | Sanford, 13 mi away | — | — |
The 26 best septic service companies in Somersworth, ranked
Ordered by CR Score, a 0–100 score from ten published factors. Paid placement never changes the order.
Based in Sanford, 13 mi away
61/100CR ScoreRanked #2 because of its Google rating and trade focus: 4.7★ from 44 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Rochester, 9 mi away
61/100CR ScoreRanked #3 because of its Google rating and review volume: 4.9★ from 165 Google reviews, the most in Somersworth.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Rochester, 12 mi away
61/100CR ScoreRanked #4 because of its Google rating and trade focus: 4.6★ from 134 Google reviews, listed on Google as “Septic system service”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
Based in Portsmouth, 13 mi away
59/100CR ScoreRanked #5 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 Sanford, 18 mi away
59/100CR ScoreRanked #6 because of its Google rating and trade focus: 5.0★ from 143 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Manchester, 11 mi away
58/100CR ScoreRanked #7 because of its Google rating and trade focus: 4.6★ from 9 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Chester, 19 mi away
57/100CR ScoreRanked #8 because of its Google rating and review volume: 4.9★ from 58 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Barrington, 8 mi away
56/100CR ScoreRanked #9 because of its Google rating and trade focus: 4.8★ from 30 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Sanford, 13 mi away
56/100CR ScoreRanked #10 because of its Google rating and trade focus: 5.0★ from 13 Google reviews, listed on Google as “Septic system service”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
Based in Dover, 4 mi away
55/100CR ScoreRanked #11 because of its Google rating and trade focus: 5.0★ from 8 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
#12 Nest & Sons Inc
Based in Kennebunk, 19 mi away
54/100CR ScoreRanked #12 because of its Google rating and trade focus: 4.8★ from 35 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Exeter, 15 mi away
54/100CR ScoreRanked #13 because of its Google rating and trade focus: 4.8★ 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 Exeter, 20 mi away
53/100CR ScoreRanked #14 because of its Google rating and review volume: 5.0★ from 103 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in East Concord, 20 mi away
53/100CR ScoreRanked #15 because of its Google rating and trade focus: 4.6★ from 31 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Barnstable, 18 mi away
53/100CR ScoreRanked #16 because of its Google rating and review volume: 5.0★ from 25 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Dover, 3 mi away
52/100CR ScoreRanked #17 because of its Google rating and review volume: 4.0★ from 12 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Portsmouth, 17 mi away
52/100CR ScoreRanked #18 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 Chester, 19 mi away
51/100CR ScoreRanked #19 because of its Google rating and review volume: 4.9★ from 58 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Lebanon, 12 mi away
50/100CR ScoreRanked #20 because of its Google rating and trade focus: 4.0★ 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 Biddeford, 23 mi away
49/100CR ScoreRanked #21 because of its Google rating and trade focus: 3.0★ from 4 Google reviews, listed on Google as “Septic system service”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
Based in Exeter, 17 mi away
48/100CR ScoreRanked #22 because of its Google rating and review volume: 4.6★ from 37 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Chester, 16 mi away
46/100CR ScoreRanked #23 because of its Google rating and trade focus: 4.6★ from 9 Google reviews, listed on Google as “Demolition contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Hampton, 21 mi away
45/100CR ScoreRanked #24 because of its Google rating and trade focus: 4.2★ from 5 Google reviews, listed on Google as “Landscaper”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Biddeford, 18 mi away
44/100CR ScoreRanked #25 because of its Google rating and trade focus: 5.0★ from 4 Google reviews, listed on Google as “Contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
All 26 septic service companies
#1 to #25 are shown in full above. Here are #26 to #26, in CR Score order; each links to its profile.
| Rank | Business | CR Score | Google rating | Distance |
|---|---|---|---|---|
| 26 | J.R.Gerrish & Sons, LLC | 43 | 5.0★ (4) | 19 mi |
Also serving Somersworth
15 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 |
|---|---|---|
| Abbott Bros Inc | 5.0★ (1) | 11 mi |
| AR Septic Solutions & Excavation | 5.0★ (2) | 15 mi |
| Day's Excavation, LLC | 5.0★ (2) | 15 mi |
| Farrell Contracting Services, LLC | 5.0★ (2) | 16 mi |
| Hayden Excavating Inc. | 5.0★ (1) | 11 mi |
| JDL Excavation | 23 mi | |
| JW Landscape Construction | 5.0★ (1) | 18 mi |
| Kerry Lapierre Septic & Site Work | 13 mi | |
| Lake Shore Construction, LLC. | 5.0★ (1) | 20 mi |
| N P Giroux Excavating LLC | 4.0★ (1) | In Somersworth |
| NH Septic Services | 9 mi | |
| Olofson Landworks LLC | 22 mi | |
| Pagoda Vent Company | 14 mi | |
| Richard Genest Inc | 11 mi | |
| South Road Designs | 5.0★ (1) | 25 mi |
How we ranked Somersworth septic service companies
We scored 26 Somersworth 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 Somersworth 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 Somersworth: frequently asked questions
Who is the best septic service company in Somersworth?
By CR Score, the highest-ranked septic service company in Somersworth, NH is Seacoast Sewer & Drain, Inc. with a CR Score of 62/100. It has 4.9★ from 156 Google reviews. It is open 24/7. A-1 Septic Tank Services (#2) and Hunts Septic Service (#3) follow. We ranked 26 septic service companies on ten factors, last updated November 3, 2026.
How many septic service companies are there in Somersworth?
ContractorsRanked ranks 26 septic service companies serving Somersworth, NH. Another 15 within 25 mi are listed but not ranked yet. Counts are as of November 2026.
Which septic service companies in Somersworth are open 24/7?
6 ranked septic service companies in Somersworth post 24/7 hours. The highest-ranked are Seacoast Sewer & Drain, Inc. (#1), A-1 Septic Tank Services (#2) and Seacoast Septic (#5). Hours come from each business's Google listing as of November 2026, so call to confirm.
Which septic service companies in Somersworth work on weekends?
9 of 26 ranked septic service companies post Saturday hours and 7 post Sunday hours. The highest-ranked open Saturdays are Seacoast Sewer & Drain, Inc. (#1), A-1 Septic Tank Services (#2) and Seacoast Septic (#5). Posted hours are office hours; crews may book weekend jobs separately.
What Google rating do Somersworth septic service companies have?
The median Google rating among 26 rated septic service companies in Somersworth is 4.8★, with a median of 25 reviews. Hunts Septic Service has the most, 165 reviews, and ranks #3. 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 Somersworth count in this ranking?
Yes, if they are within 25 mi of the Somersworth 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 Somersworth
- November 2026: CR Scores recalculated for 26 septic service companies serving Somersworth.
More septic service companies and Somersworth pages
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