Ranked #1 in Riverhead
Based in Coram, 1 mi away
64/100CR Score
Ranked #1 because of its Google rating and trade focus: 5.0★ from 93 Google reviews, listed on Google as “Septic system service”.
Best Septic Service Companies in Riverhead, NY (2026)
95 septic service companies ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
The short answer
- 1
Best overall in Riverhead: Strong Island Cesspool and Drain | 24/7 Cesspool Service | Cesspool Pumping, CR Score 64/100; 5.0★ from 93 Google reviews; open 24/7.
- 2
Best for emergencies (open 24/7): Certified Cesspool Service Suffolk County | Cesspool Pumping Suffolk NY, posts 24/7 hours; ranked #2 of 95.
- 4
Most-reviewed: Quackenbush Cesspools Inc, 579 Google reviews at 5.0★, the most of 95 ranked; ranked #4.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
95 Riverhead septic service companies are ranked here by CR Score, from ten published factors. 61 are open 24/7, 79 open Saturdays and 75 open Sundays, based on posted hours. The median Google rating is 4.9★ across 95 rated businesses.
Top 10 septic service companies in Riverhead at a glance
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Strong Island Cesspool and Drain | 24/7 Cesspool Service | Cesspool Pumping | 64 | 5.0★ (93) | Coram, 1 mi away | 24/7 | Overall |
| 2 | Certified Cesspool Service Suffolk County | Cesspool Pumping Suffolk NY | 64 | 4.8★ (411) | Stony Brook, 13 mi away | 24/7 | Emergencies |
| 3 | Emergency Cesspool Pumping Long Island | Certified Cesspool Service Suffolk NY | 63 | 5.0★ (50) | Brentwood, 1 mi away | 24/7 | — |
| 4 | Quackenbush Cesspools Inc | 63 | 5.0★ (579) | Hampton Bays, 24 mi away | 24/7 | Most reviews |
| 5 | Finest Cesspool Sewer & Drain Inc | 63 | 4.9★ (186) | Coram, 13 mi away | 24/7 | — |
| 6 | Cesspool Kings | 62 | 5.0★ (33) | Brentwood, 1 mi away | 24/7 | — |
| 7 | Clifford's Cesspool Service | 62 | 5.0★ (25) | Riverhead | 24/7 | — |
| 8 | Rignola Cesspool Services | 62 | 5.0★ (40) | Shirley, 5 mi away | 24/7 | — |
| 9 | SewerTech Cesspool & Drain | 61 | 5.0★ (134) | Medford, 19 mi away | 24/7 | — |
| 10 | CDM Drain Cleaning and Sewer Cleaning Suffolk County | 60 | 5.0★ (68) | Centereach, 1 mi away | 24/7 | — |
The 95 best septic service companies in Riverhead, 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 Stony Brook, 13 mi away
64/100CR ScoreRanked #2 because of its Google rating and trade focus: 4.8★ from 411 Google reviews, listed on Google as “Septic system service”.
Based in Brentwood, 1 mi away
63/100CR ScoreRanked #3 because of its Google rating and trade focus: 5.0★ from 50 Google reviews, listed on Google as “Septic system service”.
Based in Hampton Bays, 24 mi away
63/100CR ScoreRanked #4 because of its Google rating and review volume: 5.0★ from 579 Google reviews, the most in Riverhead.
Based in Coram, 13 mi away
63/100CR ScoreRanked #5 because of its Google rating and trade focus: 4.9★ from 186 Google reviews, listed on Google as “Septic system service”.
Based in Brentwood, 1 mi away
62/100CR ScoreRanked #6 because of its Google rating and trade focus: 5.0★ from 33 Google reviews, listed on Google as “Septic system service”.
Based in Riverhead
62/100CR ScoreRanked #7 because of its Google rating and trade focus: 5.0★ from 25 Google reviews, listed on Google as “Septic system service”.
Based in Shirley, 5 mi away
62/100CR ScoreRanked #8 because of its Google rating and trade focus: 5.0★ from 40 Google reviews, listed on Google as “Septic system service”.
Based in Medford, 19 mi away
61/100CR ScoreRanked #9 because of its Google rating and trade focus: 5.0★ from 134 Google reviews, listed on Google as “Septic system service”.
Based in Centereach, 1 mi away
60/100CR ScoreRanked #10 because of its Google rating and trade focus: 5.0★ from 68 Google reviews, listed on Google as “Plumber”.
Based in Coram, 14 mi away
60/100CR ScoreRanked #11 because of its Google rating and trade focus: 5.0★ from 55 Google reviews, listed on Google as “Septic system service”.
Based in Riverhead
60/100CR ScoreRanked #12 because of its Google rating and trade focus: 5.0★ from 9 Google reviews, listed on Google as “Septic system service”.
Based in Holbrook, 24 mi away
59/100CR ScoreRanked #13 because of its Google rating and trade focus: 4.9★ from 121 Google reviews, listed on Google as “Septic system service”.
Based in Shirley, 7 mi away
59/100CR ScoreRanked #14 because of its Google rating and trade focus: 4.9★ from 16 Google reviews, listed on Google as “Septic system service”.
Based in Coram, 6 mi away
59/100CR ScoreRanked #15 because of its Google rating and trade focus: 5.0★ from 27 Google reviews, listed on Google as “Septic system service”.
Based in Hampton Bays, 15 mi away
59/100CR ScoreRanked #16 because of its Google rating and trade focus: 5.0★ from 319 Google reviews, listed on Google as “Septic system service”.
Based in Rocky Point, 14 mi away
59/100CR ScoreRanked #17 because of its Google rating and review volume: 4.7★ from 342 Google reviews.
Based in Bayport, 1 mi away
58/100CR ScoreRanked #18 because of its Google rating and trade focus: 4.6★ from 50 Google reviews, listed on Google as “Plumber”.
Based in Holtsville, 22 mi away
58/100CR ScoreRanked #19 because of its Google rating and trade focus: 4.8★ from 172 Google reviews, listed on Google as “Septic system service”.
Based in Holbrook, 24 mi away
58/100CR ScoreRanked #20 because of its Google rating and trade focus: 4.6★ from 160 Google reviews, listed on Google as “Septic system service”.
Based in Coram, 14 mi away
58/100CR ScoreRanked #21 because of its Google rating and trade focus: 4.8★ from 23 Google reviews, listed on Google as “Septic system service”.
Based in Calverton, 1 mi away
58/100CR ScoreRanked #22 because of its Google rating and review volume: 4.8★ from 118 Google reviews.
Based in Baldwin, 16 mi away
58/100CR ScoreRanked #23 because of its Google rating and review volume: 5.0★ from 120 Google reviews.
Based in East Patchogue, 19 mi away
58/100CR ScoreRanked #24 because of its Google rating and trade focus: 4.8★ from 89 Google reviews, listed on Google as “Septic system service”.
Based in Baldwin Harbor, 17 mi away
58/100CR ScoreRanked #25 because of its Google rating and review volume: 4.8★ from 201 Google reviews.
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 95 ranked septic service companies here; the rest are on their profiles.
Also serving Riverhead
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.
How we ranked Riverhead septic service companies
We scored 95 Riverhead 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 Riverhead 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 Riverhead: frequently asked questions
Who is the best septic service company in Riverhead?
By CR Score, the highest-ranked septic service company in Riverhead, NY is Strong Island Cesspool and Drain | 24/7 Cesspool Service | Cesspool Pumping with a CR Score of 64/100. It has 5.0★ from 93 Google reviews. It is open 24/7. Certified Cesspool Service Suffolk County | Cesspool Pumping Suffolk NY (#2) and Emergency Cesspool Pumping Long Island | Certified Cesspool Service Suffolk NY (#3) follow. We ranked 95 septic service companies on ten factors, last updated November 3, 2026.
How many septic service companies are there in Riverhead?
ContractorsRanked ranks 95 septic service companies serving Riverhead, NY. 3 of them are based in Riverhead; 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 Riverhead are open 24/7?
61 ranked septic service companies in Riverhead post 24/7 hours. The highest-ranked are Strong Island Cesspool and Drain | 24/7 Cesspool Service | Cesspool Pumping (#1), Certified Cesspool Service Suffolk County | Cesspool Pumping Suffolk NY (#2) and Emergency Cesspool Pumping Long Island | Certified Cesspool Service Suffolk NY (#3). Hours come from each business's Google listing as of November 2026, so call to confirm.
Which septic service companies in Riverhead work on weekends?
79 of 95 ranked septic service companies post Saturday hours and 75 post Sunday hours. The highest-ranked open Saturdays are Strong Island Cesspool and Drain | 24/7 Cesspool Service | Cesspool Pumping (#1), Certified Cesspool Service Suffolk County | Cesspool Pumping Suffolk NY (#2) and Emergency Cesspool Pumping Long Island | Certified Cesspool Service Suffolk NY (#3). Posted hours are office hours; crews may book weekend jobs separately.
What Google rating do Riverhead septic service companies have?
The median Google rating among 95 rated septic service companies in Riverhead is 4.9★, with a median of 21 reviews. Quackenbush Cesspools Inc has the most, 579 reviews, and ranks #4. 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 Riverhead count in this ranking?
Yes, if they are within 25 mi of the Riverhead 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 Riverhead
- November 2026: CR Scores recalculated for 95 septic service companies serving Riverhead.
- November 2026: 2 duplicate listings merged.
More septic service companies and Riverhead pages
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