60/100CR 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 San Lorenzo, CA (2026)
59 septic service companies ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
The short answer
- 1
Best overall in San Lorenzo: Hydroworks Plumbing, CR Score 60/100; 5.0★ from 27 Google reviews; open 24/7.
- 2
Best for emergencies (open 24/7): A-1 Septic Tank Service Inc, posts 24/7 hours; ranked #2 of 59.
- 5
Most-reviewed: Caccia Home Services, 1,910 Google reviews at 4.9★, the most of 59 ranked; ranked #5.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
59 San Lorenzo septic service companies are ranked here by CR Score, from ten published factors. 31 are open 24/7, 47 open Saturdays and 38 open Sundays, based on posted hours. The median Google rating is 4.9★ across 59 rated businesses.
Top 10 septic service companies in San Lorenzo at a glance
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Hydroworks Plumbing | 60 | 5.0★ (27) | Hayward, 4 mi away | 24/7 | Overall |
| 2 | A-1 Septic Tank Service Inc | 59 | 4.4★ (34) | Hayward, 6 mi away | 24/7 | Emergencies |
| 3 | All Hayward Plumbing, Drain & Sewer Co. | 58 | 5.0★ (43) | Hayward, 3 mi away | 24/7 | — |
| 4 | Michael Gardner Plumbing | 57 | 5.0★ (94) | San Lorenzo | 24/7 | — |
| 5 | Caccia Home Services | 57 | 4.9★ (1,910) | Burlingame, 15 mi away | Sat · Sun · Evenings | Most reviews |
| 6 | PICHANGA PUMPING SERVICE LLC | 56 | 4.9★ (70) | Mountain View, 18 mi away | Sat · Sun | — |
| 7 | Wizard Plumbing and Drain | 56 | 4.8★ (1,648) | San Mateo, 14 mi away | Sat · Sun · Evenings | — |
| 8 | Fito Plumbers Inc. | 56 | 4.8★ (98) | Hayward, 3 mi away | 24/7 | — |
| 9 | Mr. Rooter Plumbing of The Tri-Valley | 55 | 4.8★ (271) | San Ramon, 11 mi away | 24/7 | — |
| 10 | Ace Plumbing & Rooter, Inc. | 55 | 4.9★ (931) | San Francisco, 17 mi away | Sat · Sun · Evenings | — |
The 59 best septic service companies in San Lorenzo, ranked
Ordered by CR Score, a 0–100 score from ten published factors. Paid placement never changes the order.
Based in Hayward, 6 mi away
59/100CR ScoreRanked #2 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 Hayward, 3 mi away
58/100CR ScoreRanked #3 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 San Lorenzo
57/100CR ScoreRanked #4 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 Burlingame, 15 mi away
57/100CR ScoreRanked #5 because of its Google rating and review volume: 4.9★ from 1,910 Google reviews, the most in San Lorenzo.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Mountain View, 18 mi away
56/100CR ScoreRanked #6 because of its Google rating and trade focus: 4.9★ from 70 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in San Mateo, 14 mi away
56/100CR ScoreRanked #7 because of its Google rating and review volume: 4.8★ from 1,648 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Hayward, 3 mi away
56/100CR 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 Ramon, 11 mi away
55/100CR ScoreRanked #9 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 San Francisco, 17 mi away
55/100CR ScoreRanked #10 because of its Google rating and review volume: 4.9★ from 931 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Alamo, 3 mi away
55/100CR 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, 13 mi away
54/100CR 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 Hayward, 3 mi away
54/100CR ScoreRanked #13 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 El Sobrante, 21 mi away
53/100CR ScoreRanked #14 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, 1 mi away
53/100CR ScoreRanked #15 because of its Google rating and availability: 4.3★ from 31 Google reviews, open 24/7.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Alamo, 17 mi away
53/100CR ScoreRanked #16 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, 19 mi away
53/100CR ScoreRanked #17 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 San Leandro, 5 mi away
53/100CR ScoreRanked #18 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 Sunnyvale, 22 mi away
52/100CR ScoreRanked #19 because of its Google rating and trade focus: 4.9★ from 97 Google reviews, listed on Google as “Plumber”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in San Mateo, 13 mi away
52/100CR ScoreRanked #20 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 Dublin, 15 mi away
52/100CR ScoreRanked #21 because of its Google rating and review volume: 4.9★ from 62 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Redwood Shores, 14 mi away
52/100CR ScoreRanked #22 because of its Google rating and trade focus: 4.8★ from 12 Google reviews, listed on Google as “Plumber”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Sunnyvale, 21 mi away
52/100CR ScoreRanked #23 because of its Google rating and review volume: 4.9★ from 137 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Oakland, 7 mi away
52/100CR ScoreRanked #24 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 South San Francisco, 15 mi away
52/100CR ScoreRanked #25 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.
Septic service companies ranked #26 to #50
#1 to #25 are shown in full above. Here are #26 to #50, in CR Score order; each links to its profile. We publish the top 50 of 59 ranked septic service companies here; the rest are on their profiles.
Also serving San Lorenzo
13 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 | 17 mi | |
| American Eagle Plumbing & Construction | 5.0★ (1) | 21 mi |
| Bay Area Restaurant Services LLC | 10 mi | |
| Castro Valley's H & R Plumbing - Plumbing Sewer Repair and Installation, Drain Cleaner | 4 mi | |
| Ernie's Plumbing & Sewer Services | 22 mi | |
| Evenflow sewer repair - Concord | 21 mi | |
| M.S Plumbing & Sewer Cleaner | 22 mi | |
| Quick Fix Septic | 18 mi | |
| SDR Plumbing And Sewer | 5.0★ (1) | 14 mi |
| Septic Services in Oakland | 12 mi | |
| Sewer & Drain Masters | 22 mi | |
| Sewer Rat Plumbing | 15 mi | |
| Sewerinspections | 24 mi |
How we ranked San Lorenzo septic service companies
We scored 59 San Lorenzo 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 San Lorenzo 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 San Lorenzo: frequently asked questions
Who is the best septic service company in San Lorenzo?
By CR Score, the highest-ranked septic service company in San Lorenzo, CA is Hydroworks Plumbing with a CR Score of 60/100. It has 5.0★ from 27 Google reviews. It is open 24/7. A-1 Septic Tank Service Inc (#2) and All Hayward Plumbing, Drain & Sewer Co. (#3) follow. We ranked 59 septic service companies on ten factors, last updated November 3, 2026.
How many septic service companies are there in San Lorenzo?
ContractorsRanked ranks 59 septic service companies serving San Lorenzo, CA. 1 of them is based in San Lorenzo; the rest serve it from nearby towns. Another 13 within 25 mi are listed but not ranked yet. Counts are as of November 2026.
Which septic service companies in San Lorenzo are open 24/7?
31 ranked septic service companies in San Lorenzo post 24/7 hours. The highest-ranked are Hydroworks Plumbing (#1), A-1 Septic Tank Service Inc (#2) and All Hayward Plumbing, Drain & Sewer Co. (#3). Hours come from each business's Google listing as of November 2026, so call to confirm.
Which septic service companies in San Lorenzo work on weekends?
47 of 59 ranked septic service companies post Saturday hours and 38 post Sunday hours. The highest-ranked open Saturdays are Hydroworks Plumbing (#1), A-1 Septic Tank Service Inc (#2) and All Hayward Plumbing, Drain & Sewer Co. (#3). Posted hours are office hours; crews may book weekend jobs separately.
What Google rating do San Lorenzo septic service companies have?
The median Google rating among 59 rated septic service companies in San Lorenzo is 4.9★, with a median of 30 reviews. Caccia Home Services has the most, 1,910 reviews, and ranks #5. 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 San Lorenzo count in this ranking?
Yes, if they are within 25 mi of the San Lorenzo 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 San Lorenzo
- November 2026: CR Scores recalculated for 59 septic service companies serving San Lorenzo.
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