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 Castro Valley, CA (2026)
58 septic service companies ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
The short answer
- 1
Best overall in Castro Valley: 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 58.
- 6
Most-reviewed: Caccia Home Services, 1,910 Google reviews at 4.9★, the most of 58 ranked; ranked #6.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
58 Castro Valley septic service companies are ranked here by CR Score, from ten published factors. 31 are open 24/7, 46 open Saturdays and 37 open Sundays, based on posted hours. The median Google rating is 4.8★ across 58 rated businesses.
Top 10 septic service companies in Castro Valley at a glance
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Hydroworks Plumbing | 60 | 5.0★ (27) | Hayward, 5 mi away | 24/7 | Overall |
| 2 | A-1 Septic Tank Service Inc | 59 | 4.4★ (34) | Hayward, 5 mi away | 24/7 | Emergencies |
| 3 | All Hayward Plumbing, Drain & Sewer Co. | 57 | 5.0★ (43) | Hayward, 4 mi away | 24/7 | — |
| 4 | Michael Gardner Plumbing | 56 | 5.0★ (94) | San Lorenzo, 4 mi away | 24/7 | — |
| 5 | PICHANGA PUMPING SERVICE LLC | 56 | 4.9★ (70) | Mountain View, 19 mi away | Sat · Sun | — |
| 6 | Caccia Home Services | 56 | 4.9★ (1,910) | Burlingame, 17 mi away | Sat · Sun · Evenings | Most reviews |
| 7 | Fito Plumbers Inc. | 56 | 4.8★ (98) | Hayward, 2 mi away | 24/7 | — |
| 8 | Mr. Rooter Plumbing of The Tri-Valley | 56 | 4.8★ (271) | San Ramon, 8 mi away | 24/7 | — |
| 9 | Wizard Plumbing and Drain | 56 | 4.8★ (1,648) | San Mateo, 16 mi away | Sat · Sun · Evenings | — |
| 10 | Ace Plumbing & Rooter, Inc. | 55 | 4.9★ (931) | San Francisco, 18 mi away | Sat · Sun · Evenings | — |
The 58 best septic service companies in Castro Valley, ranked
Ordered by CR Score, a 0–100 score from ten published factors. Paid placement never changes the order.
Based in Hayward, 5 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, 4 mi away
57/100CR 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, 4 mi away
56/100CR 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 Mountain View, 19 mi away
56/100CR ScoreRanked #5 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 Burlingame, 17 mi away
56/100CR ScoreRanked #6 because of its Google rating and review volume: 4.9★ from 1,910 Google reviews, the most in Castro Valley.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Hayward, 2 mi away
56/100CR ScoreRanked #7 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, 8 mi away
56/100CR ScoreRanked #8 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 Mateo, 16 mi away
56/100CR ScoreRanked #9 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 San Francisco, 18 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, 4 mi away
54/100CR 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, 15 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, 5 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 Alamo, 16 mi away
54/100CR ScoreRanked #14 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, 17 mi away
53/100CR ScoreRanked #15 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 El Sobrante, 21 mi away
53/100CR ScoreRanked #16 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, 2 mi away
53/100CR ScoreRanked #17 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 Sunnyvale, 22 mi away
52/100CR ScoreRanked #18 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 Leandro, 6 mi away
52/100CR 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 Sunnyvale, 22 mi away
52/100CR ScoreRanked #20 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, 8 mi away
52/100CR ScoreRanked #21 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 Dublin, 17 mi away
52/100CR ScoreRanked #22 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 San Mateo, 15 mi away
52/100CR 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 Redwood Shores, 16 mi away
52/100CR ScoreRanked #24 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 San Francisco, 21 mi away
52/100CR ScoreRanked #25 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.
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 58 ranked septic service companies here; the rest are on their profiles.
Also serving Castro Valley
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 | 15 mi | |
| American Eagle Plumbing & Construction | 5.0★ (1) | 21 mi |
| Bay Area Restaurant Services LLC | 8 mi | |
| Castro Valley's H & R Plumbing - Plumbing Sewer Repair and Installation, Drain Cleaner | 3 mi | |
| Ernie's Plumbing & Sewer Services | 22 mi | |
| Evenflow sewer repair - Concord | 19 mi | |
| J & G Trap Services | 5.0★ (1) | 25 mi |
| M.S Plumbing & Sewer Cleaner | 21 mi | |
| Quick Fix Septic | 20 mi | |
| SDR Plumbing And Sewer | 5.0★ (1) | 16 mi |
| Septic Services in Oakland | 13 mi | |
| Sewer & Drain Masters | 23 mi | |
| Sewer Rat Plumbing | 17 mi | |
| Sewerinspections | 24 mi |
How we ranked Castro Valley septic service companies
We scored 58 Castro Valley 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 Castro Valley 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 Castro Valley: frequently asked questions
Who is the best septic service company in Castro Valley?
By CR Score, the highest-ranked septic service company in Castro Valley, 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 58 septic service companies on ten factors, last updated November 3, 2026.
How many septic service companies are there in Castro Valley?
ContractorsRanked ranks 58 septic service companies serving Castro Valley, CA. Another 14 within 25 mi are listed but not ranked yet. Counts are as of November 2026.
Which septic service companies in Castro Valley are open 24/7?
31 ranked septic service companies in Castro Valley 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 Castro Valley work on weekends?
46 of 58 ranked septic service companies post Saturday hours and 37 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 Castro Valley septic service companies have?
The median Google rating among 58 rated septic service companies in Castro Valley is 4.8★, with a median of 31 reviews. Caccia Home Services has the most, 1,910 reviews, and ranks #6. 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 Castro Valley count in this ranking?
Yes, if they are within 25 mi of the Castro Valley 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 Castro Valley
- November 2026: CR Scores recalculated for 58 septic service companies serving Castro Valley.
More septic service companies and Castro Valley pages
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Other trades in Castro Valley
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- Water damage restoration companies in Castro Valley414 ranked
- Home builders in Castro Valley527 ranked
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- All contractors in Castro Valley