61/100CR Score
Ranked #1 because of its Google rating and review volume: 4.9★ from 722 Google reviews.
Best Septic Service Companies in Derby, CT (2026)
121 septic service companies ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
The short answer
- 1
Best overall in Derby: Mr. Rooter Plumbing of Southern Fairfield County, CR Score 61/100; 4.9★ from 722 Google reviews; open 24/7.
- 3
Best for emergencies (open 24/7): Andersons Septic Service, posts 24/7 hours; ranked #3 of 121.
- 5
Most-reviewed: Modern Home Inspections LLC, 907 Google reviews at 5.0★, the most of 121 ranked; ranked #5.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
121 Derby septic service companies are ranked here by CR Score, from ten published factors. 35 are open 24/7, 66 open Saturdays and 46 open Sundays, based on posted hours. The median Google rating is 4.9★ across 121 rated businesses.
Top 10 septic service companies in Derby at a glance
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Mr. Rooter Plumbing of Southern Fairfield County | 61 | 4.9★ (722) | Shelton, 3 mi away | 24/7 | Overall |
| 2 | Brown Septic Systems | 61 | 5.0★ (268) | Southbury, 10 mi away | Sat | — |
| 3 | Andersons Septic Service | 61 | 5.0★ (244) | Wilton, 22 mi away | 24/7 | Emergencies |
| 4 | Rick's Pump and Water Service | 61 | 4.9★ (171) | Danbury, 17 mi away | 24/7 | — |
| 5 | Modern Home Inspections LLC | 60 | 5.0★ (907) | Meriden, 21 mi away | Sat · Evenings | Most reviews |
| 6 | Aft-End Septic LLC | 60 | 5.0★ (17) | Ansonia, 2 mi away | 24/7 | — |
| 7 | Connecticut Sewer Rooter & Drain Cleaning | 59 | 4.9★ (171) | Stratford, 9 mi away | 24/7 | — |
| 8 | Unlimited Excavation and Construction | 59 | 5.0★ (27) | Bridgeport, 10 mi away | 24/7 | — |
| 9 | Unlimited Excavation and Construction Orange | 58 | 4.7★ (14) | Orange, 4 mi away | 24/7 | — |
| 10 | J Rooter Sewer and Drain Cleaning | 58 | 5.0★ (167) | Bridgeport, 13 mi away | 24/7 | — |
The 121 best septic service companies in Derby, ranked
Ordered by CR Score, a 0–100 score from ten published factors. Paid placement never changes the order.
Scores below: based on 8 of 10 factors; credentials and recency not yet collected. Hatched segments mark factors we don't have yet.
Based in Southbury, 10 mi away
61/100CR ScoreRanked #2 because of its Google rating and trade focus: 5.0★ from 268 Google reviews, listed on Google as “Septic system service”.
Based in Wilton, 22 mi away
61/100CR ScoreRanked #3 because of its Google rating and trade focus: 5.0★ from 244 Google reviews, listed on Google as “Septic system service”.
Based in Danbury, 17 mi away
61/100CR ScoreRanked #4 because of its Google rating and trade focus: 4.9★ from 171 Google reviews, listed on Google as “Septic system service”.
Based in Meriden, 21 mi away
60/100CR ScoreRanked #5 because of its Google rating and review volume: 5.0★ from 907 Google reviews, the most in Derby.
Based in Ansonia, 2 mi away
60/100CR ScoreRanked #6 because of its Google rating and trade focus: 5.0★ from 17 Google reviews, listed on Google as “Septic system service”.
Based in Stratford, 9 mi away
59/100CR ScoreRanked #7 because of its Google rating and review volume: 4.9★ from 171 Google reviews.
Based in Bridgeport, 10 mi away
59/100CR ScoreRanked #8 because of its Google rating and trade focus: 5.0★ from 27 Google reviews, listed on Google as “Septic system service”.
Based in Orange, 4 mi away
58/100CR ScoreRanked #9 because of its Google rating and trade focus: 4.7★ from 14 Google reviews, listed on Google as “Septic system service”.
Based in Bridgeport, 13 mi away
58/100CR ScoreRanked #10 because of its Google rating and review volume: 5.0★ from 167 Google reviews.
Based in Woodbridge, 5 mi away
58/100CR ScoreRanked #11 because of its Google rating and trade focus: 5.0★ from 140 Google reviews, listed on Google as “Septic system service”.
Based in Ansonia, 7 mi away
58/100CR ScoreRanked #12 because of its Google rating and trade focus: 5.0★ from 24 Google reviews, listed on Google as “Septic system service”.
Based in North Branford, 17 mi away
57/100CR ScoreRanked #13 because of its Google rating and review volume: 4.9★ from 742 Google reviews.
Based in Stamford, 21 mi away
57/100CR ScoreRanked #14 because of its Google rating and trade focus: 4.8★ from 48 Google reviews, listed on Google as “Septic system service”.
Based in Ansonia, 1 mi away
57/100CR ScoreRanked #15 because of its Google rating and trade focus: 4.6★ from 35 Google reviews, listed on Google as “Plumber”.
Based in Shelton, 3 mi away
57/100CR ScoreRanked #16 because of its Google rating and review volume: 4.7★ from 131 Google reviews.
Based in Fairfield, 15 mi away
57/100CR ScoreRanked #17 because of its Google rating and trade focus: 5.0★ from 15 Google reviews, listed on Google as “Septic system service”.
Based in Danbury, 20 mi away
57/100CR ScoreRanked #18 because of its Google rating and trade focus: 5.0★ from 120 Google reviews, listed on Google as “Septic system service”.
Based in New Milford, 13 mi away
56/100CR ScoreRanked #19 because of its Google rating and trade focus: 4.7★ from 14 Google reviews, listed on Google as “Septic system service”.
Based in Hamden, 9 mi away
56/100CR ScoreRanked #20 because of its Google rating and trade focus: 4.8★ from 17 Google reviews, listed on Google as “Septic system service”.
Based in Shelton, 5 mi away
56/100CR ScoreRanked #21 because of its Google rating and trade focus: 4.9★ from 8 Google reviews, listed on Google as “Septic system service”.
Based in Easton, 15 mi away
56/100CR ScoreRanked #22 because of its Google rating and review volume: 4.9★ from 311 Google reviews.
Based in Wallingford, 18 mi away
56/100CR ScoreRanked #23 because of its Google rating and review volume: 4.8★ from 495 Google reviews.
Based in Jefferson Valley-Yorktown, 24 mi away
55/100CR ScoreRanked #24 because of its Google rating and trade focus: 5.0★ from 28 Google reviews, listed on Google as “Septic system service”.
Based in Prospect, 14 mi away
55/100CR ScoreRanked #25 because of its Google rating and trade focus: 3.9★ from 23 Google reviews, listed on Google as “Septic system service”.
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 121 ranked septic service companies here; the rest are on their profiles.
Also serving Derby
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 |
|---|---|---|
| Baldino & Son Excavating-Sewer | 5.0★ (1) | 7 mi |
| Bonetti Septic & Excavation | 5.0★ (1) | 6 mi |
| Code Septic Design | 5.0★ (1) | 2 mi |
| Dirt Cheap Digger - Mini Excavation | 5.0★ (1) | 19 mi |
| Enviro Sewer & Drain | 5.0★ (1) | 1 mi |
| Frank's Septic and Excavating | 5.0★ (1) | 8 mi |
| Freddy's Sewer & Drain Cleaning | 5.0★ (2) | 16 mi |
| GL Scully Company | 5.0★ (1) | 6 mi |
| Luis Septic & Drain Services LLC | 5.0★ (1) | 1 mi |
| Oly Mattera Construction | 5.0★ (2) | 15 mi |
| P & D Septic Services | 5.0★ (1) | 6 mi |
| Pro-Tech Rooter, Sewer Service, Drain Cleaning | 5.0★ (1) | 11 mi |
| Sam's Septic Cleaning | 3.0★ (2) | 24 mi |
| Santini Septic Services | 1.0★ (2) | 21 mi |
| Shelton Septic & Sewer | 4.0★ (2) | 12 mi |
| Skyline Septic | 5.0★ (2) | 14 mi |
| SOS Sewer & Drain Cleaning | 5.0★ (2) | 11 mi |
| Talarico Septic & Excavating LLC | 5.0★ (2) | 13 mi |
| Terrene Services | 5.0★ (1) | 13 mi |
| The Home Depot | 4.1★ (1,246) | In Derby |
How we ranked Derby septic service companies
We scored 121 Derby 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 Derby 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 Derby: frequently asked questions
Who is the best septic service company in Derby?
By CR Score, the highest-ranked septic service company in Derby, CT is Mr. Rooter Plumbing of Southern Fairfield County with a CR Score of 61/100. It has 4.9★ from 722 Google reviews. It is open 24/7. Brown Septic Systems (#2) and Andersons Septic Service (#3) follow. We ranked 121 septic service companies on ten factors, last updated November 2, 2026.
How many septic service companies are there in Derby?
ContractorsRanked ranks 121 septic service companies serving Derby, CT. Another 20 within 25 mi are listed but not ranked yet. Counts are as of November 2026.
Which septic service companies in Derby are open 24/7?
35 ranked septic service companies in Derby post 24/7 hours. The highest-ranked are Mr. Rooter Plumbing of Southern Fairfield County (#1), Andersons Septic Service (#3) and Rick's Pump and Water Service (#4). Hours come from each business's Google listing as of November 2026, so call to confirm.
Which septic service companies in Derby work on weekends?
66 of 121 ranked septic service companies post Saturday hours and 46 post Sunday hours. The highest-ranked open Saturdays are Mr. Rooter Plumbing of Southern Fairfield County (#1), Brown Septic Systems (#2) and Andersons Septic Service (#3). Posted hours are office hours; crews may book weekend jobs separately.
What Google rating do Derby septic service companies have?
The median Google rating among 121 rated septic service companies in Derby is 4.9★, with a median of 15 reviews. Modern Home Inspections LLC has the most, 907 reviews, and ranks #5. 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 Derby count in this ranking?
Yes, if they are within 25 mi of the Derby 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 Derby
- November 2026: CR Scores recalculated for 121 septic service companies serving Derby.
- November 2026: 2 duplicate listings merged.
More septic service companies and Derby pages
Septic service companies near Derby
- Septic service companies in Shelton, CT120 ranked
- Septic service companies in Ansonia, CT125 ranked
- Septic service companies in Orange, CT119 ranked
- Septic service companies in Seymour, CT127 ranked
- Septic service companies in City of Milford (balance), CT121 ranked
- Septic service companies in Milford, CT119 ranked
- Septic service companies in Trumbull, CT112 ranked
- Septic service companies in Oxford, CT130 ranked
- Septic service companies in West Haven, CT110 ranked
- Septic service companies in New Haven, CT104 ranked
Other trades in Derby
- Roofers in Derby1331 ranked
- Plumbers in Derby482 ranked
- Electricians in Derby401 ranked
- HVAC contractors in Derby520 ranked
- General contractors in Derby779 ranked
- Painters in Derby278 ranked
- Landscapers in Derby317 ranked
- Handymen in Derby94 ranked
- Kitchen remodelers in Derby444 ranked
- Bathroom remodelers in Derby419 ranked
- Flooring contractors in Derby325 ranked
- Tile installers in Derby73 ranked
- Drywall contractors in Derby24 ranked
- Concrete contractors in Derby156 ranked
- Fence contractors in Derby158 ranked
- Deck builders in Derby226 ranked
- Siding contractors in Derby635 ranked
- Window installers in Derby515 ranked
- Gutter installers in Derby267 ranked
- Insulation contractors in Derby68 ranked
- Solar installers in Derby152 ranked
- Garage door repair companies in Derby155 ranked
- Foundation repair companies in Derby177 ranked
- Tree services in Derby426 ranked
- Masonry contractors in Derby438 ranked
- Water damage restoration companies in Derby625 ranked
- Home builders in Derby468 ranked
- Demolition contractors in Derby67 ranked
- Window cleaners in Derby73 ranked
- Pressure washing companies in Derby112 ranked
- Pest control companies in Derby114 ranked
- Paving contractors in Derby214 ranked
- Auto glass repair shops in Derby58 ranked
- Excavating contractors in Derby240 ranked
- Pool builders in Derby423 ranked
- All contractors in Derby