58/100CR Score
Ranked #1 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.
Best Septic Service Companies in Danville, CA (2026)
43 septic service companies ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
The short answer
- 1
Best overall in Danville: Hydroworks Plumbing, CR Score 58/100; 5.0★ from 27 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 43.
- 10
Most-reviewed: Ace Plumbing & Rooter, Inc., 931 Google reviews at 4.9★, the most of 43 ranked; ranked #10.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
43 Danville septic service companies are ranked here by CR Score, from ten published factors. 23 are open 24/7, 31 open Saturdays and 24 open Sundays, based on posted hours. The median Google rating is 4.8★ across 43 rated businesses.
Top 10 septic service companies in Danville at a glance
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Hydroworks Plumbing | 58 | 5.0★ (27) | Hayward, 15 mi away | 24/7 | Overall |
| 2 | Mr. Rooter Plumbing of The Tri-Valley | 57 | 4.8★ (271) | San Ramon, 7 mi away | 24/7 | Emergencies |
| 3 | A-1 Septic Tank Service Inc | 57 | 4.4★ (34) | Hayward, 14 mi away | 24/7 | — |
| 4 | JNJ Rooter and Plumbing LLC | 57 | 5.0★ (261) | Alamo, 6 mi away | 24/7 | — |
| 5 | Williams Sanitary Service Inc | 55 | 4.7★ (28) | Discovery Bay, 11 mi away | — | — |
| 6 | All Hayward Plumbing, Drain & Sewer Co. | 55 | 5.0★ (43) | Hayward, 14 mi away | 24/7 | — |
| 7 | El Sobrante Sewer Repair | 55 | 5.0★ (118) | El Sobrante, 18 mi away | Sat · Sun · Evenings | — |
| 8 | Fito Plumbers Inc. | 55 | 4.8★ (98) | Hayward, 10 mi away | 24/7 | — |
| 9 | Michael Gardner Plumbing | 55 | 5.0★ (94) | San Lorenzo, 13 mi away | 24/7 | — |
| 10 | Ace Plumbing & Rooter, Inc. | 55 | 4.9★ (931) | San Francisco, 23 mi away | Sat · Sun · Evenings | Most reviews |
The 43 best septic service companies in Danville, ranked
Ordered by CR Score, a 0–100 score from ten published factors. Paid placement never changes the order.
Based in San Ramon, 7 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, 14 mi away
57/100CR ScoreRanked #3 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 Alamo, 6 mi away
57/100CR ScoreRanked #4 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.
Based in Discovery Bay, 11 mi away
55/100CR 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, 14 mi away
55/100CR ScoreRanked #6 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 El Sobrante, 18 mi away
55/100CR ScoreRanked #7 because of its Google rating and trade focus: 5.0★ from 118 Google reviews, listed on Google as “Plumber”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Hayward, 10 mi away
55/100CR ScoreRanked #8 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, 13 mi away
55/100CR ScoreRanked #9 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 San Francisco, 23 mi away
55/100CR ScoreRanked #10 because of its Google rating and review volume: 4.9★ from 931 Google reviews, the most in Danville.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Alamo, 12 mi away
53/100CR ScoreRanked #11 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 San Mateo, 25 mi away
52/100CR ScoreRanked #12 because of its Google rating and trade focus: 5.0★ from 29 Google reviews, listed on Google as “Plumber”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Richmond, 20 mi away
52/100CR ScoreRanked #13 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 Livermore, 11 mi away
52/100CR ScoreRanked #14 because of its Google rating and availability: 4.7★ from 23 Google reviews, open 24/7.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Hayward, 15 mi away
51/100CR ScoreRanked #15 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 Francisco, 25 mi away
51/100CR ScoreRanked #16 because of its Google rating and review volume: 5.0★ from 74 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Oakland, 12 mi away
51/100CR ScoreRanked #17 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 Hayward, 12 mi away
51/100CR ScoreRanked #18 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 San Leandro, 12 mi away
51/100CR ScoreRanked #19 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 South San Francisco, 25 mi away
50/100CR ScoreRanked #20 because of its Google rating and review volume: 4.6★ from 119 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Antioch, 18 mi away
50/100CR ScoreRanked #21 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 Daly City, 24 mi away
50/100CR ScoreRanked #22 because of its Google rating and review volume: 5.0★ from 486 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in San Mateo, 25 mi away
50/100CR ScoreRanked #23 because of its Google rating and review volume: 4.6★ from 93 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Brentwood, 19 mi away
50/100CR ScoreRanked #24 because of its Google rating and review volume: 4.8★ from 396 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Fremont, 25 mi away
50/100CR ScoreRanked #25 because of its Google rating and trade focus: 4.1★ from 26 Google reviews, listed on Google as “Plumber”.
Based on 8 of 10 factors; credentials and recency not yet collected.
All 43 septic service companies
#1 to #25 are shown in full above. Here are #26 to #43, in CR Score order; each links to its profile.
| Rank | Business | CR Score | Google rating | Distance |
|---|---|---|---|---|
| 26 | Acorn Onsite, Inc. | 49 | 2.5★ (8) | 18 mi |
| 27 | Precision Flow Plumbing - Sewer Line Replacement | 49 | 5.0★ (8) | 25 mi |
| 28 | Total Underground Construction | 49 | 5.0★ (6) | 13 mi |
| 29 | Express Plumbing & Sewer Services | 49 | 4.8★ (46) | 24 mi |
| 30 | JD Services | 49 | 2.9★ (23) | 12 mi |
| 31 | American Plumbing | 49 | 3.9★ (60) | 17 mi |
| 32 | Mr. Rooter Plumbing of Solano County | 49 | 4.5★ (57) | 25 mi |
| 33 | AquaSaver Water Heaters | 48 | 5.0★ (5) | 17 mi |
| 34 | Val Betti Plumbing | 48 | 4.9★ (127) | 20 mi |
| 35 | The Oakland Plumber | Emergency Plumbing Service | 48 | 5.0★ (3) | 15 mi |
| 36 | Val Betti Plumbing | 47 | 5.0★ (14) | 6 mi |
| 37 | Prestige Plumbing and Sewer LLC | 47 | 4.4★ (14) | 13 mi |
| 38 | Underground Rooter Sewer and Drains | 47 | 5.0★ (12) | 24 mi |
| 39 | Sewer Connection Inc | 47 | 4.6★ (30) | 19 mi |
| 40 | Sewer Master | 47 | 4.4★ (14) | 15 mi |
| 41 | Top Grade Sewer And Plumbing, Inc | 46 | 5.0★ (9) | 24 mi |
| 42 | Ernie's Plumbing and Sewer Service | 46 | 2.9★ (34) | 14 mi |
| 43 | NS SEWER PIPING | 46 | 5.0★ (19) | 25 mi |
Also serving Danville
15 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 | 17 mi | |
| Bay Area Restaurant Services LLC | 2 mi | |
| Castro Valley's H & R Plumbing - Plumbing Sewer Repair and Installation, Drain Cleaner | 13 mi | |
| Discovery Bay Sewer Services | 22 mi | |
| Ernie's Plumbing & Sewer Services | 18 mi | |
| Evenflow sewer repair - Concord | 11 mi | |
| J & G Trap Services | 5.0★ (1) | 20 mi |
| Quick Fix Septic | 24 mi | |
| Rooterman Drain & Sewer Service | 5.0★ (2) | 23 mi |
| Septic Services in Oakland | 15 mi | |
| Sewer & Drain Masters | 21 mi | |
| Sewer Master | 25 mi | |
| Sewerinspections | 20 mi |
How we ranked Danville septic service companies
We scored 43 Danville 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 Danville 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 Danville: frequently asked questions
Who is the best septic service company in Danville?
By CR Score, the highest-ranked septic service company in Danville, CA is Hydroworks Plumbing with a CR Score of 58/100. It has 5.0★ from 27 Google reviews. It is open 24/7. Mr. Rooter Plumbing of The Tri-Valley (#2) and A-1 Septic Tank Service Inc (#3) follow. We ranked 43 septic service companies on ten factors, last updated November 2, 2026.
How many septic service companies are there in Danville?
ContractorsRanked ranks 43 septic service companies serving Danville, CA. Another 15 within 25 mi are listed but not ranked yet. Counts are as of November 2026.
Which septic service companies in Danville are open 24/7?
23 ranked septic service companies in Danville post 24/7 hours. The highest-ranked are Hydroworks Plumbing (#1), Mr. Rooter Plumbing of The Tri-Valley (#2) and A-1 Septic Tank Service Inc (#3). Hours come from each business's Google listing as of November 2026, so call to confirm.
Which septic service companies in Danville work on weekends?
31 of 43 ranked septic service companies post Saturday hours and 24 post Sunday hours. The highest-ranked open Saturdays are Hydroworks Plumbing (#1), Mr. Rooter Plumbing of The Tri-Valley (#2) and A-1 Septic Tank Service Inc (#3). Posted hours are office hours; crews may book weekend jobs separately.
What Google rating do Danville septic service companies have?
The median Google rating among 43 rated septic service companies in Danville is 4.8★, with a median of 29 reviews. Ace Plumbing & Rooter, Inc. has the most, 931 reviews, and ranks #10. 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 Danville count in this ranking?
Yes, if they are within 25 mi of the Danville 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 Danville
- November 2026: CR Scores recalculated for 43 septic service companies serving Danville.
More septic service companies and Danville pages
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