61/100CR 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 Durham, NH (2026)
33 septic service companies ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
The short answer
- 1
Best overall in Durham: Seacoast Sewer & Drain, Inc., CR Score 61/100; 4.9★ from 156 Google reviews; open 24/7.
- 2
Best for emergencies (open 24/7): Carl's Septic Systems and Services in New Hampshire, posts 24/7 hours; ranked #2 of 33.
- 9
Most-reviewed: Kent Septic LLC, 287 Google reviews at 4.8★, the most of 33 ranked; ranked #9.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
33 Durham septic service companies are ranked here by CR Score, from ten published factors. 10 are open 24/7, 16 open Saturdays and 12 open Sundays, based on posted hours. The median Google rating is 4.8★ across 33 rated businesses.
Top 10 septic service companies in Durham at a glance
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Seacoast Sewer & Drain, Inc. | 61 | 4.9★ (156) | Eliot, 8 mi away | 24/7 | Overall |
| 2 | Carl's Septic Systems and Services in New Hampshire | 60 | 4.8★ (118) | Manchester, 21 mi away | 24/7 | Emergencies |
| 3 | Seacoast Septic | 59 | 5.0★ (13) | Portsmouth, 7 mi away | 24/7 | — |
| 4 | Roland's Sewer Service | 59 | 4.6★ (9) | Manchester, 5 mi away | 24/7 | — |
| 5 | Top Dog Sewer & Drain | 58 | 4.9★ (58) | Chester, 10 mi away | 24/7 | — |
| 6 | A-1 Septic Tank Services | 58 | 4.7★ (44) | Sanford, 20 mi away | 24/7 | — |
| 7 | Hunts Septic Service | 58 | 4.9★ (165) | Rochester, 14 mi away | — | — |
| 8 | LaPierre Septic | 58 | 4.6★ (134) | Rochester, 18 mi away | — | — |
| 9 | Kent Septic LLC | 56 | 4.8★ (287) | Manchester, 25 mi away | — | Most reviews |
| 10 | Epping and Exeter Septic Service | 55 | 4.8★ (24) | Exeter, 6 mi away | — | — |
The 33 best septic service companies in Durham, ranked
Ordered by CR Score, a 0–100 score from ten published factors. Paid placement never changes the order.
Based in Manchester, 21 mi away
60/100CR ScoreRanked #2 because of its Google rating and trade focus: 4.8★ from 118 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Portsmouth, 7 mi away
59/100CR ScoreRanked #3 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 Manchester, 5 mi away
59/100CR ScoreRanked #4 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, 10 mi away
58/100CR ScoreRanked #5 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 Sanford, 20 mi away
58/100CR ScoreRanked #6 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, 14 mi away
58/100CR ScoreRanked #7 because of its Google rating and trade focus: 4.9★ from 165 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Rochester, 18 mi away
58/100CR ScoreRanked #8 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 Manchester, 25 mi away
56/100CR ScoreRanked #9 because of its Google rating and review volume: 4.8★ from 287 Google reviews, the most in Durham.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Exeter, 6 mi away
55/100CR ScoreRanked #10 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 East Concord, 24 mi away
55/100CR ScoreRanked #11 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 Barrington, 10 mi away
55/100CR ScoreRanked #12 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 Plaistow, 23 mi away
55/100CR ScoreRanked #13 because of its Google rating and trade focus: 4.8★ from 52 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Exeter, 11 mi away
55/100CR 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.
#15 Sewer Surgeons
Based in Derry, 20 mi away
54/100CR ScoreRanked #15 because of its Google rating and trade focus: 5.0★ from 5 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Barnstable, 9 mi away
54/100CR 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 Hampstead, 21 mi away
54/100CR ScoreRanked #17 because of its Google rating and trade focus: 4.8★ 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 Sandown, 17 mi away
54/100CR ScoreRanked #18 because of its Google rating and review volume: 5.0★ from 51 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Dover, 5 mi away
54/100CR ScoreRanked #19 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.
Based in Sanford, 20 mi away
53/100CR ScoreRanked #20 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 Chester, 9 mi away
53/100CR ScoreRanked #21 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 Portsmouth, 10 mi away
53/100CR ScoreRanked #22 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 Concord, 23 mi away
52/100CR ScoreRanked #23 because of its Google rating and review volume: 4.9★ from 56 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in East Concord, 22 mi away
52/100CR ScoreRanked #24 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 Dover, 6 mi away
50/100CR ScoreRanked #25 because of its Google rating and trade focus: 4.0★ from 12 Google reviews, listed on Google as “General contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
All 33 septic service companies
#1 to #25 are shown in full above. Here are #26 to #33, in CR Score order; each links to its profile.
| Rank | Business | CR Score | Google rating | Distance |
|---|---|---|---|---|
| 26 | A Sewer Services | 50 | 4.7★ (17) | 20 mi |
| 27 | Rye Beach Landscaping, LLC | 49 | 4.6★ (37) | 8 mi |
| 28 | Chandlers Septic Services | 48 | 4.0★ (4) | 21 mi |
| 29 | Robbins Excavation | 47 | 4.6★ (9) | 7 mi |
| 30 | Piedmont Excavation and Septic | 45 | 3.9★ (17) | 24 mi |
| 31 | Construction Solutions | 45 | 5.0★ (5) | 20 mi |
| 32 | Jungle Jim's | 45 | 4.6★ (29) | 24 mi |
| 33 | United Compressor & Pump Services Inc. | 43 | 5.0★ (8) | 22 mi |
Also serving Durham
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 |
|---|---|---|
| Abbott Bros Inc | 5.0★ (1) | 5 mi |
| AR Septic Solutions & Excavation | 5.0★ (2) | 23 mi |
| Day's Excavation, LLC | 5.0★ (2) | 23 mi |
| Farrell Contracting Services, LLC | 5.0★ (2) | 7 mi |
| Hayden Excavating Inc. | 5.0★ (1) | 19 mi |
| JDL Excavation | 16 mi | |
| JW Landscape Construction | 5.0★ (1) | 10 mi |
| Kerry Lapierre Septic & Site Work | 19 mi | |
| Lake Shore Construction, LLC. | 5.0★ (1) | 18 mi |
| Liberty Septic Services, LLC | 5.0★ (1) | 20 mi |
| Lot Pro's | In Durham | |
| N P Giroux Excavating LLC | 4.0★ (1) | 12 mi |
| NH Septic Services | 13 mi | |
| Olofson Landworks LLC | 12 mi | |
| Pagoda Vent Company | 12 mi | |
| QUIRK Real Estate Sales, Development and Construction | 3.0★ (2) | 20 mi |
| Reid Plumbing | 4.9★ (103) | In Durham |
| Richard Genest Inc | 20 mi | |
| Slate Corporation | 5.0★ (1) | 25 mi |
| South Road Designs | 5.0★ (1) | 21 mi |
How we ranked Durham septic service companies
We scored 33 Durham 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 Durham 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 Durham: frequently asked questions
Who is the best septic service company in Durham?
By CR Score, the highest-ranked septic service company in Durham, NH is Seacoast Sewer & Drain, Inc. with a CR Score of 61/100. It has 4.9★ from 156 Google reviews. It is open 24/7. Carl's Septic Systems and Services in New Hampshire (#2) and Seacoast Septic (#3) follow. We ranked 33 septic service companies on ten factors, last updated November 3, 2026.
How many septic service companies are there in Durham?
ContractorsRanked ranks 33 septic service companies serving Durham, NH. Another 20 within 25 mi are listed but not ranked yet. Counts are as of November 2026.
Which septic service companies in Durham are open 24/7?
10 ranked septic service companies in Durham post 24/7 hours. The highest-ranked are Seacoast Sewer & Drain, Inc. (#1), Carl's Septic Systems and Services in New Hampshire (#2) and Seacoast Septic (#3). Hours come from each business's Google listing as of November 2026, so call to confirm.
Which septic service companies in Durham work on weekends?
16 of 33 ranked septic service companies post Saturday hours and 12 post Sunday hours. The highest-ranked open Saturdays are Seacoast Sewer & Drain, Inc. (#1), Carl's Septic Systems and Services in New Hampshire (#2) and Seacoast Septic (#3). Posted hours are office hours; crews may book weekend jobs separately.
What Google rating do Durham septic service companies have?
The median Google rating among 33 rated septic service companies in Durham is 4.8★, with a median of 29 reviews. Kent Septic LLC has the most, 287 reviews, and ranks #9. 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 Durham count in this ranking?
Yes, if they are within 25 mi of the Durham 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 Durham
- November 2026: CR Scores recalculated for 33 septic service companies serving Durham.
More septic service companies and Durham pages
Septic service companies near Durham
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