61/100CR Score
Ranked #1 because of its Google rating and trade focus: 5.0★ from 185 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 Novato, CA (2026)
47 septic service companies ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
The short answer
- 1
Best overall in Novato: The Lavatory, CR Score 61/100; 5.0★ from 185 Google reviews; open 24/7.
- 2
Best for emergencies (open 24/7): Brian's Septic Service, posts 24/7 hours; ranked #2 of 47.
- 12
Most-reviewed: Ace Plumbing & Rooter, Inc., 931 Google reviews at 4.9★, the most of 47 ranked; ranked #12.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
47 Novato septic service companies are ranked here by CR Score, from ten published factors. 22 are open 24/7, 30 open Saturdays and 24 open Sundays, based on posted hours. The median Google rating is 4.9★ across 47 rated businesses.
Top 10 septic service companies in Novato at a glance
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | The Lavatory | 61 | 5.0★ (185) | Daly City, 18 mi away | 24/7 | Overall |
| 2 | Brian's Septic Service | 59 | 5.0★ (104) | Santa Rosa, 22 mi away | 24/7 | Emergencies |
| 3 | AllStarz Pumping & Engineering | 57 | 4.7★ (127) | Santa Rosa, 25 mi away | 24/7 | — |
| 4 | Bob's underground septic | 57 | 5.0★ (14) | Santa Rosa, 16 mi away | 24/7 | — |
| 5 | American Sanitation Inc | 57 | 5.0★ (361) | Napa, 21 mi away | — | — |
| 6 | Superior Septic Pumping Service | 56 | 4.8★ (21) | Santa Rosa, 12 mi away | Sat · Sun · Evenings | — |
| 7 | Mr. Rooter Plumbing of Sonoma County | 56 | 4.9★ (923) | Santa Rosa, 25 mi away | 24/7 | — |
| 8 | Redwood Sewer & Drain Services | 56 | 5.0★ (163) | Larkfield-Wikiup, 24 mi away | 24/7 | — |
| 9 | El Sobrante Sewer Repair | 55 | 5.0★ (118) | El Sobrante, 19 mi away | Sat · Sun · Evenings | — |
| 10 | Dan's Plumbing & Sewer Service | 55 | 5.0★ (236) | San Rafael, 11 mi away | — | — |
The 47 best septic service companies in Novato, ranked
Ordered by CR Score, a 0–100 score from ten published factors. Paid placement never changes the order.
Based in Santa Rosa, 22 mi away
59/100CR ScoreRanked #2 because of its Google rating and trade focus: 5.0★ from 104 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Santa Rosa, 25 mi away
57/100CR ScoreRanked #3 because of its Google rating and trade focus: 4.7★ from 127 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Santa Rosa, 16 mi away
57/100CR ScoreRanked #4 because of its Google rating and trade focus: 5.0★ 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 Napa, 21 mi away
57/100CR ScoreRanked #5 because of its Google rating and trade focus: 5.0★ from 361 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Santa Rosa, 12 mi away
56/100CR ScoreRanked #6 because of its Google rating and trade focus: 4.8★ from 21 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Santa Rosa, 25 mi away
56/100CR ScoreRanked #7 because of its Google rating and review volume: 4.9★ from 923 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Larkfield-Wikiup, 24 mi away
56/100CR ScoreRanked #8 because of its Google rating and review volume: 5.0★ from 163 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in El Sobrante, 19 mi away
55/100CR ScoreRanked #9 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 San Rafael, 11 mi away
55/100CR ScoreRanked #10 because of its Google rating and review volume: 5.0★ from 236 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Novato
54/100CR ScoreRanked #11 because of its Google rating and availability: 5.0★ from 13 Google reviews, open 24/7.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in San Francisco, 25 mi away
54/100CR ScoreRanked #12 because of its Google rating and review volume: 4.9★ from 931 Google reviews, the most in Novato.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Benicia, 15 mi away
54/100CR 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 Sonoma, 14 mi away
53/100CR ScoreRanked #14 because of its Google rating and trade focus: 4.9★ from 90 Google reviews, listed on Google as “Air conditioning contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Larkfield-Wikiup, 25 mi away
53/100CR ScoreRanked #15 because of its Google rating and trade focus: 5.0★ from 7 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Petaluma, 9 mi away
53/100CR ScoreRanked #16 because of its Google rating and trade focus: 3.5★ from 11 Google reviews, listed on Google as “Septic system service”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
Based in Fairfield, 24 mi away
53/100CR ScoreRanked #17 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 Richmond, 18 mi away
52/100CR ScoreRanked #18 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 Santa Rosa, 24 mi away
52/100CR ScoreRanked #19 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 Petaluma, 12 mi away
52/100CR ScoreRanked #20 because of its Google rating and trade focus: 4.4★ from 7 Google reviews, listed on Google as “Contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Santa Rosa, 22 mi away
52/100CR ScoreRanked #21 because of its Google rating and review volume: 4.9★ from 90 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in San Francisco, 23 mi away
52/100CR ScoreRanked #22 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 Santa Rosa, 18 mi away
51/100CR ScoreRanked #23 because of its Google rating and trade focus: 5.0★ from 20 Google reviews, listed on Google as “Plumber”.
Based on 8 of 10 factors; credentials and recency not yet collected.
#24 Marin H2O
Based in San Rafael, 7 mi away
51/100CR ScoreRanked #24 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.
Based in Vallejo, 17 mi away
51/100CR ScoreRanked #25 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.
All 47 septic service companies
#1 to #25 are shown in full above. Here are #26 to #47, in CR Score order; each links to its profile.
Also serving Novato
20 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 |
|---|---|---|
| American Eagle Plumbing & Construction | 5.0★ (1) | 20 mi |
| Carlos' Petaluma Septic Services | In Novato | |
| Finch Plumbing And Sewer | 18 mi | |
| GAC Plumbing Company | 5.0★ (2) | 12 mi |
| GAC Plumbing Company (Rohnert Park) | 18 mi | |
| Mike Treinen-Onsite Wastewater | 18 mi | |
| North Bay Septic Services | 5.0★ (1) | 11 mi |
| Northen Sewer & Drain | 5.0★ (1) | 17 mi |
| Plumbing & High Pressure Sewer Jetting Drain Cleaning Service | 18 mi | |
| Rapid Rooter Sewer-Drain Cleaning | 18 mi | |
| Rooterman Drain & Sewer Service | 5.0★ (2) | 19 mi |
| Roy's Sewer Services | 5.0★ (1) | 9 mi |
| Sequoia Septic Tank Service | 5.0★ (1) | 21 mi |
| Sequoia Septic Tank Services | 11 mi | |
| Sewer & Drain Masters | 16 mi | |
| Sewerinspections | 17 mi | |
| Trinity Oaks Septic Services | 5.0★ (1) | 14 mi |
| Vineyard Septic | 5.0★ (1) | 17 mi |
| Walker Septic Services | 15 mi | |
| West County Septic | 18 mi |
How we ranked Novato septic service companies
We scored 47 Novato 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 Novato 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 Novato: frequently asked questions
Who is the best septic service company in Novato?
By CR Score, the highest-ranked septic service company in Novato, CA is The Lavatory with a CR Score of 61/100. It has 5.0★ from 185 Google reviews. It is open 24/7. Brian's Septic Service (#2) and AllStarz Pumping & Engineering (#3) follow. We ranked 47 septic service companies on ten factors, last updated November 3, 2026.
How many septic service companies are there in Novato?
ContractorsRanked ranks 47 septic service companies serving Novato, CA. 2 of them are based in Novato; the rest serve it from nearby towns. Another 20 within 25 mi are listed but not ranked yet. Counts are as of November 2026.
Which septic service companies in Novato are open 24/7?
22 ranked septic service companies in Novato post 24/7 hours. The highest-ranked are The Lavatory (#1), Brian's Septic Service (#2) and AllStarz Pumping & Engineering (#3). Hours come from each business's Google listing as of November 2026, so call to confirm.
Which septic service companies in Novato work on weekends?
30 of 47 ranked septic service companies post Saturday hours and 24 post Sunday hours. The highest-ranked open Saturdays are The Lavatory (#1), Brian's Septic Service (#2) and AllStarz Pumping & Engineering (#3). Posted hours are office hours; crews may book weekend jobs separately.
What Google rating do Novato septic service companies have?
The median Google rating among 47 rated septic service companies in Novato is 4.9★, with a median of 20 reviews. Ace Plumbing & Rooter, Inc. has the most, 931 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 Novato count in this ranking?
Yes, if they are within 25 mi of the Novato 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 Novato
- November 2026: CR Scores recalculated for 47 septic service companies serving Novato.
More septic service companies and Novato pages
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