59/100CR Score
Ranked #1 because of its Google rating and review volume: 5.0★ from 261 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Best Septic Service Companies in Clayton, CA (2026)
37 septic service companies ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
The short answer
- 1
Best overall in Clayton: JNJ Rooter and Plumbing LLC, CR Score 59/100; 5.0★ from 261 Google reviews; open 24/7.
- 2
Best for emergencies (open 24/7): Mr. Rooter Plumbing of The Tri-Valley, posts 24/7 hours; ranked #2 of 37.
- 11
Most-reviewed: Precision Plumbing & Contracting, 396 Google reviews at 4.8★, the most of 37 ranked; ranked #11.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
37 Clayton septic service companies are ranked here by CR Score, from ten published factors. 19 are open 24/7, 24 open Saturdays and 19 open Sundays, based on posted hours. The median Google rating is 4.8★ across 37 rated businesses.
Top 10 septic service companies in Clayton at a glance
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | JNJ Rooter and Plumbing LLC | 59 | 5.0★ (261) | Alamo, 4 mi away | 24/7 | Overall |
| 2 | Mr. Rooter Plumbing of The Tri-Valley | 57 | 4.8★ (271) | San Ramon, 15 mi away | 24/7 | Emergencies |
| 3 | Hydroworks Plumbing | 56 | 5.0★ (27) | Hayward, 24 mi away | 24/7 | — |
| 4 | El Sobrante Sewer Repair | 56 | 5.0★ (118) | El Sobrante, 19 mi away | Sat · Sun · Evenings | — |
| 5 | Williams Sanitary Service Inc | 56 | 4.7★ (28) | Discovery Bay, 13 mi away | — | — |
| 6 | A-1 Septic Tank Service Inc | 55 | 4.4★ (34) | Hayward, 23 mi away | 24/7 | — |
| 7 | Mr. Rooter Plumbing of Contra Costa County | 55 | 4.8★ (265) | Fairfield, 22 mi away | 24/7 | — |
| 8 | All Hayward Plumbing, Drain & Sewer Co. | 54 | 5.0★ (43) | Hayward, 23 mi away | 24/7 | — |
| 9 | Fito Plumbers Inc. | 53 | 4.8★ (98) | Hayward, 19 mi away | 24/7 | — |
| 10 | Michael Gardner Plumbing | 53 | 5.0★ (94) | San Lorenzo, 22 mi away | 24/7 | — |
The 37 best septic service companies in Clayton, ranked
Ordered by CR Score, a 0–100 score from ten published factors. Paid placement never changes the order.
Based in San Ramon, 15 mi away
57/100CR ScoreRanked #2 because of its Google rating and review volume: 4.8★ from 271 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Hayward, 24 mi away
56/100CR ScoreRanked #3 because of its Google rating and trade focus: 5.0★ from 27 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in El Sobrante, 19 mi away
56/100CR ScoreRanked #4 because of its Google rating and review volume: 5.0★ from 118 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Discovery Bay, 13 mi away
56/100CR ScoreRanked #5 because of its Google rating and trade focus: 4.7★ from 28 Google reviews, listed on Google as “Septic system service”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
Based in Hayward, 23 mi away
55/100CR ScoreRanked #6 because of its Google rating and trade focus: 4.4★ 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 Fairfield, 22 mi away
55/100CR ScoreRanked #7 because of its Google rating and review volume: 4.8★ from 265 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Hayward, 23 mi away
54/100CR ScoreRanked #8 because of its Google rating and trade focus: 5.0★ from 43 Google reviews, listed on Google as “Plumber”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Hayward, 19 mi away
53/100CR ScoreRanked #9 because of its Google rating and review volume: 4.8★ from 98 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in San Lorenzo, 22 mi away
53/100CR ScoreRanked #10 because of its Google rating and review volume: 5.0★ from 94 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Brentwood, 14 mi away
53/100CR ScoreRanked #11 because of its Google rating and review volume: 4.8★ from 396 Google reviews, the most in Clayton.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Antioch, 10 mi away
52/100CR ScoreRanked #12 because of its Google rating and trade focus: 4.2★ from 5 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Benicia, 25 mi away
52/100CR ScoreRanked #13 because of its Google rating and trade focus: 4.4★ from 59 Google reviews, listed on Google as “Plumber”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Antioch, 8 mi away
52/100CR ScoreRanked #14 because of its Google rating and review volume: 3.9★ from 60 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Richmond, 22 mi away
52/100CR ScoreRanked #15 because of its Google rating and review volume: 4.9★ from 59 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Alamo, 21 mi away
51/100CR ScoreRanked #16 because of its Google rating and trade focus: 4.2★ from 24 Google reviews, listed on Google as “Plumber”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Livermore, 16 mi away
51/100CR ScoreRanked #17 because of its Google rating and review volume: 4.7★ from 23 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Vallejo, 22 mi away
51/100CR ScoreRanked #18 because of its Google rating and review volume: 4.5★ from 57 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Oakland, 19 mi away
50/100CR ScoreRanked #19 because of its Google rating and trade focus: 3.1★ from 23 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Fairfield, 22 mi away
50/100CR ScoreRanked #20 because of its Google rating and review volume: 4.7★ from 380 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Hayward, 24 mi away
49/100CR ScoreRanked #21 because of its Google rating and trade focus: 4.9★ 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 San Leandro, 21 mi away
49/100CR ScoreRanked #22 because of its Google rating and availability: 4.8★ from 17 Google reviews, open 24/7.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Hayward, 21 mi away
49/100CR ScoreRanked #23 because of its Google rating and review volume: 4.3★ from 31 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Livermore, 22 mi away
49/100CR ScoreRanked #24 because of its Google rating and trade focus: 2.5★ from 8 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Richmond, 22 mi away
49/100CR ScoreRanked #25 because of its Google rating and review volume: 4.9★ from 127 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
All 37 septic service companies
#1 to #25 are shown in full above. Here are #26 to #37, in CR Score order; each links to its profile.
| Rank | Business | CR Score | Google rating | Distance |
|---|---|---|---|---|
| 26 | Prestige Plumbing and Sewer LLC | 49 | 4.4★ (14) | 9 mi |
| 27 | Ernie's Plumbing and Sewer Service | 48 | 2.9★ (34) | 10 mi |
| 28 | JD Services | 48 | 2.9★ (23) | 19 mi |
| 29 | Sewer Connection Inc | 48 | 4.6★ (30) | 20 mi |
| 30 | NS SEWER PIPING | 47 | 5.0★ (19) | 21 mi |
| 31 | Val Betti Plumbing | 47 | 5.0★ (14) | 8 mi |
| 32 | Total Underground Construction | 47 | 5.0★ (6) | 21 mi |
| 33 | United Rentals - Reliable Onsite Services | 47 | 4.3★ (3) | 22 mi |
| 34 | Copperfield Plumbing | 47 | 4.8★ (25) | 22 mi |
| 35 | AquaSaver Water Heaters | 46 | 5.0★ (5) | 23 mi |
| 36 | The Oakland Plumber | Emergency Plumbing Service | 46 | 5.0★ (3) | 21 mi |
| 37 | Sewer Master | 46 | 4.4★ (14) | 20 mi |
Also serving Clayton
14 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 |
|---|---|---|
| A-1 Rapid Rooter | 7 mi | |
| American Eagle Plumbing & Construction | 5.0★ (1) | 17 mi |
| Antioch Sewer Services | 8 mi | |
| Bay Area Restaurant Services LLC | 11 mi | |
| Castro Valley's H & R Plumbing - Plumbing Sewer Repair and Installation, Drain Cleaner | 21 mi | |
| Discovery Bay Sewer Services | 18 mi | |
| Ernie's Plumbing & Sewer Services | 18 mi | |
| Evenflow sewer repair - Concord | 6 mi | |
| J & G Trap Services | 5.0★ (1) | 20 mi |
| Rooterman Drain & Sewer Service | 5.0★ (2) | 19 mi |
| Septic Services in Oakland | 21 mi | |
| Sewer & Drain Masters | 23 mi | |
| Sewer Master | 21 mi | |
| Sewerinspections | 20 mi |
How we ranked Clayton septic service companies
We scored 37 Clayton 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 Clayton 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 Clayton: frequently asked questions
Who is the best septic service company in Clayton?
By CR Score, the highest-ranked septic service company in Clayton, CA is JNJ Rooter and Plumbing LLC with a CR Score of 59/100. It has 5.0★ from 261 Google reviews. It is open 24/7. Mr. Rooter Plumbing of The Tri-Valley (#2) and Hydroworks Plumbing (#3) follow. We ranked 37 septic service companies on ten factors, last updated November 3, 2026.
How many septic service companies are there in Clayton?
ContractorsRanked ranks 37 septic service companies serving Clayton, CA. Another 14 within 25 mi are listed but not ranked yet. Counts are as of November 2026.
Which septic service companies in Clayton are open 24/7?
19 ranked septic service companies in Clayton post 24/7 hours. The highest-ranked are JNJ Rooter and Plumbing LLC (#1), Mr. Rooter Plumbing of The Tri-Valley (#2) and Hydroworks Plumbing (#3). Hours come from each business's Google listing as of November 2026, so call to confirm.
Which septic service companies in Clayton work on weekends?
24 of 37 ranked septic service companies post Saturday hours and 19 post Sunday hours. The highest-ranked open Saturdays are JNJ Rooter and Plumbing LLC (#1), Mr. Rooter Plumbing of The Tri-Valley (#2) and Hydroworks Plumbing (#3). Posted hours are office hours; crews may book weekend jobs separately.
What Google rating do Clayton septic service companies have?
The median Google rating among 37 rated septic service companies in Clayton is 4.8★, with a median of 28 reviews. Precision Plumbing & Contracting has the most, 396 reviews, and ranks #11. 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 Clayton count in this ranking?
Yes, if they are within 25 mi of the Clayton 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 Clayton
- November 2026: CR Scores recalculated for 37 septic service companies serving Clayton.
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