63/100CR Score
Ranked #1 because of its Google rating and trade focus: 5.0★ from 21 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 Merced, CA (2026)
9 septic service companies ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
The short answer
- 1
Best overall in Merced: SUPREME SEPTIC PUMPING, CR Score 63/100; 5.0★ from 21 Google reviews; open 24/7.
- 2
Best for emergencies (open 24/7): Merced Septic Cleaning, posts 24/7 hours; ranked #2 of 9.
- 4
Most-reviewed: Dutchman Drains & Plumbing, 129 Google reviews at 4.8★, the most of 9 ranked; ranked #4.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
9 Merced septic service companies are ranked here by CR Score, from ten published factors. 4 are open 24/7, 5 open Saturdays and 4 open Sundays, based on posted hours. The median Google rating is 4.8★ across 9 rated businesses.
Top 9 septic service companies in Merced at a glance
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | SUPREME SEPTIC PUMPING | 63 | 5.0★ (21) | Merced | 24/7 | Overall |
| 2 | Merced Septic Cleaning | 61 | 5.0★ (28) | Winton, 10 mi away | 24/7 | Emergencies |
| 3 | QuikFlush Septic Service, LLC | 60 | 5.0★ (29) | Atwater, 17 mi away | 24/7 | — |
| 4 | Dutchman Drains & Plumbing | 57 | 4.8★ (129) | Atwater, 5 mi away | 24/7 | Most reviews |
| 5 | Stockton Septic Services | 56 | 4.6★ (34) | Stockton, 23 mi away | Sat · Sun · Evenings | — |
| 6 | Premier Septic Service | 54 | 5.0★ (11) | Chowchilla, 18 mi away | Sat | — |
| 7 | Mountain Valley Septic | 51 | 2.3★ (3) | Merced | — | — |
| 8 | Central Valley Pro Plumbing | 47 | 3.0★ (4) | Merced | Evenings | — |
| 9 | Sun Valley Pumping | 43 | 3.9★ (15) | Turlock, 24 mi away | — | — |
The 9 best septic service companies in Merced, ranked
Ordered by CR Score, a 0–100 score from ten published factors. Paid placement never changes the order.
Based in Winton, 10 mi away
61/100CR ScoreRanked #2 because of its Google rating and trade focus: 5.0★ from 28 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Atwater, 17 mi away
60/100CR ScoreRanked #3 because of its Google rating and trade focus: 5.0★ from 29 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Atwater, 5 mi away
57/100CR ScoreRanked #4 because of its Google rating and review volume: 4.8★ from 129 Google reviews, the most in Merced.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Stockton, 23 mi away
56/100CR ScoreRanked #5 because of its Google rating and trade focus: 4.6★ 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 Chowchilla, 18 mi away
54/100CR ScoreRanked #6 because of its Google rating and trade focus: 5.0★ from 11 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Merced
51/100CR ScoreRanked #7 because of its Google rating and trade focus: 2.3★ from 3 Google reviews, listed on Google as “General contractor”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
Based in Merced
47/100CR ScoreRanked #8 because of its Google rating and trade focus: 3.0★ from 4 Google reviews, listed on Google as “Plumber”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Turlock, 24 mi away
43/100CR ScoreRanked #9 because of its Google rating and review volume: 3.9★ from 15 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
How we ranked Merced septic service companies
We scored 9 Merced 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 Merced 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 Merced: frequently asked questions
Who is the best septic service company in Merced?
By CR Score, the highest-ranked septic service company in Merced, CA is SUPREME SEPTIC PUMPING with a CR Score of 63/100. It has 5.0★ from 21 Google reviews. It is open 24/7. Merced Septic Cleaning (#2) and QuikFlush Septic Service, LLC (#3) follow. We ranked 9 septic service companies on ten factors, last updated November 2, 2026.
How many septic service companies are there in Merced?
ContractorsRanked ranks 9 septic service companies serving Merced, CA. 3 of them are based in Merced; the rest serve it from nearby towns. Counts are as of November 2026.
Which septic service companies in Merced are open 24/7?
4 ranked septic service companies in Merced post 24/7 hours. The highest-ranked are SUPREME SEPTIC PUMPING (#1), Merced Septic Cleaning (#2) and QuikFlush Septic Service, LLC (#3). Hours come from each business's Google listing as of November 2026, so call to confirm.
Which septic service companies in Merced work on weekends?
5 of 9 ranked septic service companies post Saturday hours and 4 post Sunday hours. The highest-ranked open Saturdays are SUPREME SEPTIC PUMPING (#1), Merced Septic Cleaning (#2) and QuikFlush Septic Service, LLC (#3). Posted hours are office hours; crews may book weekend jobs separately.
What Google rating do Merced septic service companies have?
The median Google rating among 9 rated septic service companies in Merced is 4.8★, with a median of 21 reviews. Dutchman Drains & Plumbing has the most, 129 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 Merced count in this ranking?
Yes, if they are within 25 mi of the Merced 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 Merced
- November 2026: CR Scores recalculated for 9 septic service companies serving Merced.
More septic service companies and Merced pages
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