63/100CR Score
Ranked #1 because of its Google rating and trade focus: 5.0★ from 244 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 Darien, CT (2026)
158 septic service companies ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
The short answer
- 1
Best overall in Darien: Andersons Septic Service, CR Score 63/100; 5.0★ from 244 Google reviews; open 24/7.
- 2
Best for emergencies (open 24/7): Affordable Cesspool Sewer & Drain | Septic & Grease Trap Service - Long Island, posts 24/7 hours; ranked #2 of 158.
- 13
Most-reviewed: Citywide Sewer-Drain & Plumbing Corp, 1,423 Google reviews at 4.8★, the most of 158 ranked; ranked #13.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
158 Darien septic service companies are ranked here by CR Score, from ten published factors. 80 are open 24/7, 112 open Saturdays and 95 open Sundays, based on posted hours. The median Google rating is 4.9★ across 158 rated businesses.
Most of this list also appears on the Septic service companies in Stamford ranking. See Septic service companies in Stamford
Top 10 septic service companies in Darien at a glance
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Andersons Septic Service | 63 | 5.0★ (244) | Wilton, 11 mi away | 24/7 | Overall |
| 2 | Affordable Cesspool Sewer & Drain | Septic & Grease Trap Service - Long Island | 61 | 4.9★ (699) | Brentwood, 24 mi away | 24/7 | Emergencies |
| 3 | Al Dexter Septic & Drainage | 60 | 4.8★ (48) | Stamford, 6 mi away | 24/7 | — |
| 4 | Discount Cesspool & Drain Inc. | 60 | 4.9★ (481) | Brentwood, 24 mi away | 24/7 | — |
| 5 | Rick's Pump and Water Service | 60 | 4.9★ (171) | Danbury, 17 mi away | 24/7 | — |
| 6 | Four Seasons Cesspool | 60 | 5.0★ (276) | Nesconset, 23 mi away | 24/7 | — |
| 7 | White Wolf Cesspool Services | 60 | 4.9★ (729) | Commack, 19 mi away | — | — |
| 8 | A. Procaccini & Sons Septic and Drain Cleaning | 59 | 5.0★ (9) | Darien | 24/7 | — |
| 9 | Reputable Cesspool & Drain | 59 | 5.0★ (147) | Smithtown, 23 mi away | 24/7 | — |
| 10 | Empire Sewer and Water CT | 58 | 5.0★ (54) | Stamford, 4 mi away | 24/7 | — |
The 158 best septic service companies in Darien, ranked
Ordered by CR Score, a 0–100 score from ten published factors. Paid placement never changes the order.
Based in Brentwood, 24 mi away
61/100CR ScoreRanked #2 because of its Google rating and trade focus: 4.9★ from 699 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Stamford, 6 mi away
60/100CR ScoreRanked #3 because of its Google rating and trade focus: 4.8★ from 48 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Brentwood, 24 mi away
60/100CR ScoreRanked #4 because of its Google rating and trade focus: 4.9★ from 481 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Danbury, 17 mi away
60/100CR ScoreRanked #5 because of its Google rating and trade focus: 4.9★ from 171 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Nesconset, 23 mi away
60/100CR ScoreRanked #6 because of its Google rating and trade focus: 5.0★ from 276 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Commack, 19 mi away
60/100CR ScoreRanked #7 because of its Google rating and trade focus: 4.9★ from 729 Google reviews, listed on Google as “Septic system service”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
Based in Darien
59/100CR ScoreRanked #8 because of its Google rating and trade focus: 5.0★ 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 Smithtown, 23 mi away
59/100CR ScoreRanked #9 because of its Google rating and trade focus: 5.0★ from 147 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Stamford, 4 mi away
58/100CR ScoreRanked #10 because of its Google rating and trade focus: 5.0★ from 54 Google reviews, listed on Google as “Plumber”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Bridgeport, 13 mi away
58/100CR ScoreRanked #11 because of its Google rating and review volume: 5.0★ from 167 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
#12 A&M Pumps
Based in Jefferson Valley-Yorktown, 16 mi away
58/100CR ScoreRanked #12 because of its Google rating and trade focus: 5.0★ from 34 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in East Garden City, 24 mi away
58/100CR ScoreRanked #13 because of its Google rating and review volume: 4.8★ from 1,423 Google reviews, the most in Darien.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Stamford, 3 mi away
57/100CR ScoreRanked #14 because of its Google rating and trade focus: 5.0★ from 38 Google reviews, listed on Google as “Plumber”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Bay Shore, 25 mi away
57/100CR ScoreRanked #15 because of its Google rating and trade focus: 4.9★ from 108 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Ronkonkoma, 25 mi away
57/100CR ScoreRanked #16 because of its Google rating and trade focus: 4.9★ from 92 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Fairfield, 12 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 on 8 of 10 factors; credentials and recency not yet collected.
Based in Bridgeport, 17 mi away
57/100CR ScoreRanked #18 because of its Google rating and trade focus: 5.0★ 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 Stamford, 3 mi away
57/100CR ScoreRanked #19 because of its Google rating and trade focus: 5.0★ from 31 Google reviews, listed on Google as “Plumber”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Darien
57/100CR ScoreRanked #20 because of its Google rating and trade focus: 4.9★ from 21 Google reviews, listed on Google as “Plumber”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Englewood Cliffs, 14 mi away
57/100CR ScoreRanked #21 because of its Google rating and trade focus: 5.0★ from 108 Google reviews, listed on Google as “Plumber”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in New York City, 24 mi away
57/100CR ScoreRanked #22 because of its Google rating and trade focus: 4.9★ from 70 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Deer Park, 25 mi away
57/100CR ScoreRanked #23 because of its Google rating and trade focus: 4.6★ from 155 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Glen Cove, 17 mi away
56/100CR ScoreRanked #24 because of its Google rating and trade focus: 4.9★ from 22 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Huntington Station, 16 mi away
56/100CR ScoreRanked #25 because of its Google rating and trade focus: 5.0★ from 18 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
How we ranked Darien septic service companies
We scored 158 Darien 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 Darien 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 Darien: frequently asked questions
Who is the best septic service company in Darien?
By CR Score, the highest-ranked septic service company in Darien, CT is Andersons Septic Service with a CR Score of 63/100. It has 5.0★ from 244 Google reviews. It is open 24/7. Affordable Cesspool Sewer & Drain | Septic & Grease Trap Service - Long Island (#2) and Al Dexter Septic & Drainage (#3) follow. We ranked 158 septic service companies on ten factors, last updated November 2, 2026.
How many septic service companies are there in Darien?
ContractorsRanked ranks 158 septic service companies serving Darien, CT. 2 of them are based in Darien; the rest serve it from nearby towns. Counts are as of November 2026.
Which septic service companies in Darien are open 24/7?
80 ranked septic service companies in Darien post 24/7 hours. The highest-ranked are Andersons Septic Service (#1), Affordable Cesspool Sewer & Drain | Septic & Grease Trap Service - Long Island (#2) and Al Dexter Septic & Drainage (#3). Hours come from each business's Google listing as of November 2026, so call to confirm.
Which septic service companies in Darien work on weekends?
112 of 158 ranked septic service companies post Saturday hours and 95 post Sunday hours. The highest-ranked open Saturdays are Andersons Septic Service (#1), Affordable Cesspool Sewer & Drain | Septic & Grease Trap Service - Long Island (#2) and Al Dexter Septic & Drainage (#3). Posted hours are office hours; crews may book weekend jobs separately.
What Google rating do Darien septic service companies have?
The median Google rating among 158 rated septic service companies in Darien is 4.9★, with a median of 21 reviews. Citywide Sewer-Drain & Plumbing Corp has the most, 1,423 reviews, and ranks #13. 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 Darien count in this ranking?
Yes, if they are within 25 mi of the Darien 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 Darien
- November 2026: CR Scores recalculated for 158 septic service companies serving Darien.
- November 2026: 3 duplicate listings merged.
More septic service companies and Darien pages
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