143 septic service companies ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Islip: Affordable Cesspool Sewer & Drain | Septic & Grease Trap Service - Long Island, CR Score 66/100; 4.9★ from 699 Google reviews; open 24/7.
Best for emergencies (open 24/7): Discount Cesspool & Drain Inc., posts 24/7 hours; ranked #2 of 143.
Most-reviewed: Mr. Rooter Plumbing of Long Island, 1,488 Google reviews at 4.7★, the most of 143 ranked; ranked #15.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
143 Islip septic service companies are ranked here by CR Score, from ten published factors. 88 are open 24/7, 117 open Saturdays and 106 open Sundays, based on posted hours. The median Google rating is 4.9★ across 143 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Affordable Cesspool Sewer & Drain | Septic & Grease Trap Service - Long Island | 66 | 4.9★ (699) | Brentwood, 5 mi away | 24/7 | Overall |
| 2 | Discount Cesspool & Drain Inc. | 65 | 4.9★ (481) | Brentwood, 5 mi away | 24/7 | Emergencies |
| 3 | Four Seasons Cesspool | 64 | 5.0★ (276) | Nesconset, 8 mi away | 24/7 | — |
| 4 | Reputable Cesspool & Drain | 62 | 5.0★ (147) | Smithtown, 9 mi away | 24/7 | — |
| 5 | Rapid Response Cesspool, Sewer & Drain | 62 | 4.9★ (108) | Bay Shore, 5 mi away | 24/7 | — |
| 6 | White Wolf Cesspool Services | 62 | 4.9★ (729) | Commack, 10 mi away | — | — |
| 7 | 24/7 CESSPOOL SEPTIC SERVICE SUFFOLK COUNTY - Drastic Drainage Long Island | 62 | 4.8★ (132) | West Babylon, 6 mi away | 24/7 | — |
| 8 | Battlin' Barry's Cesspool Sewe | 62 | 4.9★ (121) | Holbrook, 8 mi away | 24/7 | — |
| 9 | AAA Dependable Cesspool, Sewer & Drain Service Inc. | 61 | 4.9★ (92) | Ronkonkoma, 7 mi away | 24/7 | — |
| 10 | Cesspool Pros & Sewer and Drain Pros of Suffolk & Nassau County | 61 | 4.6★ (155) | Deer Park, 5 mi away | 24/7 | — |
Ordered by CR Score, a 0–100 score from ten published factors. Paid placement never changes the order.
Ranked #1 in Islip
Based in Brentwood, 5 mi away
Ranked #1 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 Brentwood, 5 mi away
Ranked #2 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 Nesconset, 8 mi away
Ranked #3 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 Smithtown, 9 mi away
Ranked #4 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 Bay Shore, 5 mi away
Ranked #5 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 Commack, 10 mi away
Ranked #6 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 West Babylon, 6 mi away
Ranked #7 because of its Google rating and trade focus: 4.8★ from 132 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Holbrook, 8 mi away
Ranked #8 because of its Google rating and trade focus: 4.9★ from 121 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Ronkonkoma, 7 mi away
Ranked #9 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 Deer Park, 5 mi away
Ranked #10 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 Medford, 12 mi away
Ranked #11 because of its Google rating and trade focus: 5.0★ from 134 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Holbrook, 7 mi away
Ranked #12 because of its Google rating and trade focus: 4.6★ from 160 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Ronkonkoma, 7 mi away
Ranked #13 because of its Google rating and trade focus: 4.7★ from 196 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Stony Brook, 20 mi away
Ranked #14 because of its Google rating and trade focus: 4.8★ from 411 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Bayport, 4 mi away
Ranked #15 because of its Google rating and review volume: 4.7★ from 1,488 Google reviews, the most in Islip.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Holtsville, 10 mi away
Ranked #16 because of its Google rating and trade focus: 4.8★ from 172 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Coram, 20 mi away
Ranked #17 because of its Google rating and trade focus: 4.9★ from 186 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Holbrook, 9 mi away
Ranked #18 because of its Google rating and trade focus: 4.4★ from 87 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, 22 mi away
Ranked #19 because of its Google rating and review volume: 4.8★ from 1,423 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Brentwood, 6 mi away
Ranked #20 because of its Google rating and trade focus: 5.0★ from 14 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Coram, 8 mi away
Ranked #21 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 Coram, 17 mi away
Ranked #22 because of its Google rating and trade focus: 5.0★ from 55 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Bay Shore, 5 mi away
Ranked #23 because of its Google rating and review volume: 5.0★ from 258 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Centereach, 12 mi away
Ranked #24 because of its Google rating and trade focus: 4.9★ from 78 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, 6 mi away
Ranked #25 because of its Google rating and trade focus: 4.8★ from 76 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
#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 143 ranked septic service companies here; the rest are on their profiles.
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 |
|---|---|---|
| ABC Sewer Services Inc | 5.0★ (2) | 4 mi |
| Allways Clear Sewer & Drain Inc. | 5.0★ (1) | 8 mi |
| Antorino Sewer & Drain - Cesspool Service | 1.0★ (1) | 5 mi |
| Artco Construction INC | 5.0★ (2) | 6 mi |
| Busch Bros Cesspool Sewer & Drain, Corp | 5.0★ (2) | 10 mi |
| Cesspool Sewer Services | 5.0★ (1) | 10 mi |
| Dun-Rite Cesspool Sewer & Drain | 1.0★ (1) | 10 mi |
| East Northport Cesspool | 5.0★ (1) | 11 mi |
| Huntington Station Cesspool | 5.0★ (1) | 11 mi |
| Island Cesspool Pumping | 5.0★ (2) | 14 mi |
| Izzo Excavation Inc | 1.0★ (1) | 11 mi |
| Long Island Drain & Sewer Service | 5.0★ (2) | 9 mi |
| Long Island Water and Sewer Main | 5.0★ (2) | 6 mi |
| Mangano Sewer N | 4.5★ (2) | 7 mi |
| MLK Sewer & Drain | 2.5★ (2) | 22 mi |
| Nudo Cesspool Co | 5.0★ (2) | 13 mi |
| Suffolk County Septic Tank Pumping & Services | Septic Repair Suffolk NY | 3.0★ (2) | 15 mi |
| Turner Cesspool Sewer Line Svce Co Inc | 5.0★ (1) | 6 mi |
| Uncle Pauls $50 Sewer & Drain | 5.0★ (2) | 20 mi |
| United Site Services | 3.0★ (2) | 8 mi |
We scored 143 Islip 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 Islip 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 |