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ContractorsRanked

Best Septic Service Companies in Dover, DE (2026)

14 septic service companies ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →

The short answer

  1. 1

    Best overall in Dover: Septic Masters, CR Score 67/100; 4.9★ from 191 Google reviews; open 24/7.

  2. 4

    Best for emergencies (open 24/7): Drainfield Defender, posts 24/7 hours; ranked #4 of 14.

  3. 6

    Most-reviewed: Roto-Rooter Plumbing & Water Cleanup of Delmarva, 367 Google reviews at 4.9★, the most of 14 ranked; ranked #6.

Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank

14 Dover septic service companies are ranked here by CR Score, from ten published factors. 5 are open 24/7, 7 open Saturdays and 5 open Sundays, based on posted hours. The median Google rating is 4.9★ across 14 rated businesses.

Top 10 septic service companies in Dover at a glance

Top 10 septic service companies in Dover at a glance
RankBusinessCR ScoreGoogle ratingBased inHoursBest for
1Septic Masters674.9★ (191)Dover24/7Overall
2Nichols Septic Service645.0★ (146)Dover——
3L E Parsons Septic Services614.9★ (54)DoverSat—
4Drainfield Defender585.0★ (3)Dover24/7Emergencies
5Mr. Rooter Plumbing of Delmarva584.7★ (78)Dover24/7—
6Roto-Rooter Plumbing & Water Cleanup of Delmarva574.9★ (367)Easton, 13 mi awaySat · SunMost reviews
7Go-Green Porta-Pot Rentals575.0★ (3)Dover24/7—
8Midway Services Inc.544.8★ (86)Milford, 22 mi away——
9Mr. Rooter Plumbing of Middletown534.9★ (88)Middletown, 22 mi away24/7—
10Pierce Septic Services504.1★ (9)Bridgeton, 24 mi away——

The 14 best septic service companies in Dover, ranked

Ordered by CR Score, a 0–100 score from ten published factors. Paid placement never changes the order.

  1. Ranked #1 in Dover

    #1 Septic Masters

    Based in Dover

    67/100CR Score

    Ranked #1 because of its Google rating and trade focus: 4.9★ from 191 Google reviews, listed on Google as “Septic system service”.

    Based on 8 of 10 factors; credentials and recency not yet collected.

    • 4.9★ from 191 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    317 N Layton Ave, Wyoming, DE 19934
    View profile for Septic Masters(302) 861-0433

  3. #3 L E Parsons Septic Services

    Based in Dover

    61/100CR Score

    Ranked #3 because of its Google rating and trade focus: 4.9★ from 54 Google reviews, listed on Google as “Septic system service”.

    Based on 8 of 10 factors; credentials and recency not yet collected.

    • 4.9★ from 54 Google reviews
    Hours
    Mon–Fri 7:30 AM–5 PM · Sat 9 AM–5 PM · Sun closed
    Address
    2326 Lockwood Chapel Rd, Dover, DE 19904
    View profile for L E Parsons Septic Services(302) 670-8007

  4. #4 Drainfield Defender

    Based in Dover

    58/100CR Score

    Ranked #4 because of its Google rating and trade focus: 5.0★ from 3 Google reviews, listed on Google as “Septic system service”.

    Based on 8 of 10 factors; credentials and recency not yet collected.

    • 5.0★ from 3 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    View profile for Drainfield Defender(302) 291-7812

  8. #8 Midway Services Inc.

    Based in Milford, 22 mi away

    54/100CR Score

    Ranked #8 because of its Google rating and trade focus: 4.8★ from 86 Google reviews, listed on Google as “Septic system service”.

    Based on 8 of 10 factors; credentials and recency not yet collected.

    • 4.8★ from 86 Google reviews
    Hours
    Mon–Fri 8 AM–4 PM · Sat–Sun closed
    Address
    9446 Willow Pond Ln, Lincoln, DE 19960
    View profile for Midway Services Inc.(302) 422-8603

  10. #10 Pierce Septic Services

    Based in Bridgeton, 24 mi away

    50/100CR Score

    Ranked #10 because of its Google rating and trade focus: 4.1★ from 9 Google reviews, listed on Google as “Septic system service”.

    Based on 7 of 10 factors; credentials, recency and availability not yet collected.

    • 4.1★ from 9 Google reviews
    Address
    87 Gould Ave, Bridgeton, NJ 08302
    View profile for Pierce Septic Services(856) 453-0487

  11. #11 RWH construction LLC

    Based in Bridgeton, 24 mi away

    48/100CR Score

    Ranked #11 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.

    • 5.0★ from 4 Google reviews
    Hours
    Mon–Fri 7 AM–5 PM · Sat–Sun closed
    Address
    634 Shiloh Pike, Bridgeton, NJ 08302
    View profile for RWH construction LLC(856) 982-5970

  14. #14 Lore's Septic Services

    Based in Millville, 24 mi away

    47/100CR Score

    Ranked #14 because of its Google rating and trade focus: 4.9★ from 7 Google reviews, listed on Google as “Plumber”.

    Based on 7 of 10 factors; credentials, recency and availability not yet collected.

    • 4.9★ from 7 Google reviews
    Address
    3385 Cedarville Rd, Cedarville, NJ 08311
    View profile for Lore's Septic Services(856) 447-4518

Also serving Dover

5 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.

Unranked septic service companies serving Dover
BusinessGoogle ratingDistance
B & M Septic Services1.0★ (1)In Dover
B & M Septic Services Inc11 mi
Elliott's Septic Services5.0★ (1)24 mi
Intelligent Choice Wastewater Solutions19 mi
Weaver's Sanitation10 mi

How we ranked Dover septic service companies

We scored 14 Dover 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.

Read the full method: formula, sources and exclusions

CR Score factors and weights
FactorWeightComputed fromIn Dover data
Reputation25%Google star rating, adjusted for how many reviews back itMeasured
Credentials15%Active state license, bond and workers’ comp on fileNot yet collected
Review volume10%Number of Google reviews, compared with the most-reviewed business on the listMeasured
Recency5%Share of reviews from the last 12 monthsNot yet collected
Availability5%Weekly open hours, Saturday, Sunday, 24/7 or same-dayMeasured
Trade focus10%How clearly the business does this trade (its Google category and name)Measured
Proximity5%Based in the city scores highest, less the farther away it isMeasured
Claimed profile10%The business has claimed its ContractorsRanked profile (free or paid earn the same)Measured
Partnered5%The business links to ContractorsRanked from its own website with our badge, checked periodicallyMeasured
ContractorsRanked reviews10%Verified customer reviews collected by ContractorsRanked: their rating and how many there areMeasured

Septic service companies in Dover: frequently asked questions

Who is the best septic service company in Dover?

By CR Score, the highest-ranked septic service company in Dover, DE is Septic Masters with a CR Score of 67/100. It has 4.9★ from 191 Google reviews. It is open 24/7. Nichols Septic Service (#2) and L E Parsons Septic Services (#3) follow. We ranked 14 septic service companies on ten factors, last updated November 2, 2026.

How many septic service companies are there in Dover?

ContractorsRanked ranks 14 septic service companies serving Dover, DE. 6 of them are based in Dover; the rest serve it from nearby towns. Another 5 within 25 mi are listed but not ranked yet. Counts are as of November 2026.

Which septic service companies in Dover are open 24/7?

5 ranked septic service companies in Dover post 24/7 hours. The highest-ranked are Septic Masters (#1), Drainfield Defender (#4) and Mr. Rooter Plumbing of Delmarva (#5). Hours come from each business's Google listing as of November 2026, so call to confirm.

Which septic service companies in Dover work on weekends?

7 of 14 ranked septic service companies post Saturday hours and 5 post Sunday hours. The highest-ranked open Saturdays are Septic Masters (#1), L E Parsons Septic Services (#3) and Drainfield Defender (#4). Posted hours are office hours; crews may book weekend jobs separately.

What Google rating do Dover septic service companies have?

The median Google rating among 14 rated septic service companies in Dover is 4.9★, with a median of 48 reviews. Roto-Rooter Plumbing & Water Cleanup of Delmarva has the most, 367 reviews, and ranks #6. 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 Dover count in this ranking?

Yes, if they are within 25 mi of the Dover 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 Dover

  1. November 2026: CR Scores recalculated for 14 septic service companies serving Dover.

More septic service companies and Dover pages

Other trades in Dover