61/100CR Score
Ranked #1 because of its Google rating and trade focus: 5.0★ from 152 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 Wilmington, DE (2026)
36 septic service companies ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
The short answer
- 1
Best overall in Wilmington: Hernandez Sanitation Services, CR Score 61/100; 5.0★ from 152 Google reviews; open Saturdays until 5 PM.
- 2
Best for emergencies (open 24/7): Delaware Valley Septic, Sewer & Storm, posts 24/7 hours; ranked #2 of 36.
- 12
Most-reviewed: Mattioni Plumbing, Heating & Cooling, 3,621 Google reviews at 4.8★, the most of 36 ranked; ranked #12.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
36 Wilmington septic service companies are ranked here by CR Score, from ten published factors. 18 are open 24/7, 23 open Saturdays and 22 open Sundays, based on posted hours. The median Google rating is 4.9★ across 36 rated businesses.
Top 10 septic service companies in Wilmington at a glance
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Hernandez Sanitation Services | 61 | 5.0★ (152) | Wilmington | Sat · Evenings | Overall |
| 2 | Delaware Valley Septic, Sewer & Storm | 61 | 4.9★ (477) | Springfield, 18 mi away | 24/7 | Emergencies |
| 3 | Wind River Environmental of Swedesboro, NJ | 61 | 5.0★ (138) | Pennsville, 12 mi away | 24/7 | — |
| 4 | OnSite Management, Inc. | 58 | 4.9★ (83) | West Chester, 17 mi away | 24/7 | — |
| 5 | R & M Plumbing, Heating & Sewer Cleaning | 58 | 4.7★ (178) | Claymont, 3 mi away | 24/7 | — |
| 6 | Queen Bee's Septic, LLC | 57 | 4.9★ (79) | Elkton, 20 mi away | 24/7 | — |
| 7 | English Sewage Disposal Inc | 57 | 4.8★ (591) | Bridgeton, 24 mi away | Sat · Sun | — |
| 8 | Eldredge Septic | 57 | 5.0★ (1,278) | Coatesville, 21 mi away | — | — |
| 9 | Mattioni Plumbing, Heating & Cooling | 57 | 5.0★ (477) | Kennett Square, 11 mi away | 24/7 | — |
| 10 | McGovern Septic | 57 | 4.6★ (32) | West Chester, 15 mi away | 24/7 | — |
The 36 best septic service companies in Wilmington, ranked
Ordered by CR Score, a 0–100 score from ten published factors. Paid placement never changes the order.
Based in Springfield, 18 mi away
61/100CR ScoreRanked #2 because of its Google rating and trade focus: 4.9★ from 477 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Pennsville, 12 mi away
61/100CR ScoreRanked #3 because of its Google rating and trade focus: 5.0★ from 138 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in West Chester, 17 mi away
58/100CR ScoreRanked #4 because of its Google rating and trade focus: 4.9★ from 83 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Claymont, 3 mi away
58/100CR ScoreRanked #5 because of its Google rating and trade focus: 4.7★ from 178 Google reviews, listed on Google as “Plumber”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Elkton, 20 mi away
57/100CR ScoreRanked #6 because of its Google rating and trade focus: 4.9★ from 79 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Bridgeton, 24 mi away
57/100CR ScoreRanked #7 because of its Google rating and trade focus: 4.8★ from 591 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Coatesville, 21 mi away
57/100CR ScoreRanked #8 because of its Google rating and trade focus: 5.0★ from 1,278 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Kennett Square, 11 mi away
57/100CR ScoreRanked #9 because of its Google rating and review volume: 5.0★ from 477 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
#10 McGovern Septic
Based in West Chester, 15 mi away
57/100CR ScoreRanked #10 because of its Google rating and trade focus: 4.6★ from 32 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in West Chester, 14 mi away
56/100CR ScoreRanked #11 because of its Google rating and trade focus: 4.8★ from 20 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Downingtown, 20 mi away
56/100CR ScoreRanked #12 because of its Google rating and review volume: 4.8★ from 3,621 Google reviews, the most in Wilmington.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Elkton, 18 mi away
56/100CR ScoreRanked #13 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 Newark, 14 mi away
55/100CR ScoreRanked #14 because of its Google rating and review volume: 4.9★ from 501 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Wilmington
55/100CR ScoreRanked #15 because of its Google rating and review volume: 4.6★ from 109 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in King of Prussia, 23 mi away
54/100CR ScoreRanked #16 because of its Google rating and review volume: 5.0★ from 667 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Elkton, 14 mi away
54/100CR ScoreRanked #17 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 Elkton, 20 mi away
52/100CR ScoreRanked #18 because of its Google rating and trade focus: 4.8★ from 24 Google reviews, listed on Google as “Septic system service”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
Based in Pennsville, 14 mi away
52/100CR ScoreRanked #19 because of its Google rating and trade focus: 5.0★ from 25 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Lansdowne, 20 mi away
51/100CR ScoreRanked #20 because of its Google rating and trade focus: 4.9★ from 147 Google reviews, listed on Google as “Plumber”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Middletown, 23 mi away
50/100CR ScoreRanked #21 because of its Google rating and review volume: 4.9★ from 88 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Glasgow, 14 mi away
50/100CR ScoreRanked #22 because of its Google rating and review volume: 4.9★ from 417 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Brookhaven, 13 mi away
50/100CR ScoreRanked #23 because of its Google rating and review volume: 5.0★ from 233 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Pennsville, 19 mi away
50/100CR ScoreRanked #24 because of its Google rating and trade focus: 5.0★ from 4 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Chester, 13 mi away
49/100CR ScoreRanked #25 because of its Google rating and availability: 4.4★ from 13 Google reviews, open 24/7.
Based on 8 of 10 factors; credentials and recency not yet collected.
All 36 septic service companies
#1 to #25 are shown in full above. Here are #26 to #36, in CR Score order; each links to its profile.
| Rank | Business | CR Score | Google rating | Distance |
|---|---|---|---|---|
| 26 | Profound Flow Drain Cleaning | 49 | 5.0★ (13) | 17 mi |
| 27 | Maryland Precast Co | 49 | 2.7★ (3) | 20 mi |
| 28 | Arrow Sanitary Service | 49 | 2.8★ (16) | 12 mi |
| 29 | Drain Visions | 47 | 4.5★ (15) | 23 mi |
| 30 | United Rentals - Reliable Onsite Services | 47 | 5.0★ (3) | 23 mi |
| 31 | No Dig Pipeliners LLC | 47 | 5.0★ (3) | 19 mi |
| 32 | Pennmark Plumbing | 46 | 5.0★ (4) | 18 mi |
| 33 | LECCO Excavating-Pipeline | 45 | 4.5★ (21) | 19 mi |
| 34 | Pro Rock Construction Services LLC | 45 | 4.7★ (15) | 14 mi |
| 35 | William P MC Govern Sanitation | 44 | 4.4★ (8) | 15 mi |
| 36 | Delphi Contracting Inc | 41 | 4.2★ (5) | 22 mi |
Also serving Wilmington
12 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 |
|---|---|---|
| Abbadusky Environmental Services | 5.0★ (1) | 22 mi |
| Albert Brewin Septic Services | 5.0★ (1) | 23 mi |
| B Neil Gentry Excavating | 9 mi | |
| Barbara's Septic Cleaning | 14 mi | |
| Carneys Point Twp Sewerage | 5 mi | |
| Delaware County Plumber | 14 mi | |
| Delaware Plumbing Professionals | In Wilmington | |
| Howell Edward P Inc | 3.0★ (2) | 21 mi |
| Jordan T Caldarelli | 21 mi | |
| Parker Wastewater Consulting, Inc. | 5.0★ (1) | 21 mi |
| Robert F. Wiesner Plumbing & Septic | 13 mi | |
| Watson Plumbing & Heating Inc. | 5.0★ (2) | 11 mi |
How we ranked Wilmington septic service companies
We scored 36 Wilmington 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 Wilmington 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 Wilmington: frequently asked questions
Who is the best septic service company in Wilmington?
By CR Score, the highest-ranked septic service company in Wilmington, DE is Hernandez Sanitation Services with a CR Score of 61/100. It has 5.0★ from 152 Google reviews. It is open Saturdays until 5 PM. Delaware Valley Septic, Sewer & Storm (#2) and Wind River Environmental of Swedesboro, NJ (#3) follow. We ranked 36 septic service companies on ten factors, last updated November 2, 2026.
How many septic service companies are there in Wilmington?
ContractorsRanked ranks 36 septic service companies serving Wilmington, DE. 2 of them are based in Wilmington; the rest serve it from nearby towns. Another 12 within 25 mi are listed but not ranked yet. Counts are as of November 2026.
Which septic service companies in Wilmington are open 24/7?
18 ranked septic service companies in Wilmington post 24/7 hours. The highest-ranked are Delaware Valley Septic, Sewer & Storm (#2), Wind River Environmental of Swedesboro, NJ (#3) and OnSite Management, Inc. (#4). Hours come from each business's Google listing as of November 2026, so call to confirm.
Which septic service companies in Wilmington work on weekends?
23 of 36 ranked septic service companies post Saturday hours and 22 post Sunday hours. The highest-ranked open Saturdays are Hernandez Sanitation Services (#1), Delaware Valley Septic, Sewer & Storm (#2) and Wind River Environmental of Swedesboro, NJ (#3). Posted hours are office hours; crews may book weekend jobs separately.
What Google rating do Wilmington septic service companies have?
The median Google rating among 36 rated septic service companies in Wilmington is 4.9★, with a median of 58 reviews. Mattioni Plumbing, Heating & Cooling has the most, 3,621 reviews, and ranks #12. 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 Wilmington count in this ranking?
Yes, if they are within 25 mi of the Wilmington 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 Wilmington
- November 2026: CR Scores recalculated for 36 septic service companies serving Wilmington.
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