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 Union City, CA (2026)
64 septic service companies ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
The short answer
- 1
Best overall in Union City: 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 64.
- 8
Most-reviewed: Caccia Home Services, 1,910 Google reviews at 4.9★, the most of 64 ranked; ranked #8.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
64 Union City septic service companies are ranked here by CR Score, from ten published factors. 34 are open 24/7, 54 open Saturdays and 42 open Sundays, based on posted hours. The median Google rating is 4.8★ across 64 rated businesses.
Top 10 septic service companies in Union City at a glance
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Hydroworks Plumbing | 60 | 5.0★ (27) | Hayward, 6 mi away | 24/7 | Overall |
| 2 | A-1 Septic Tank Service Inc | 59 | 4.4★ (34) | Hayward, 3 mi away | 24/7 | Emergencies |
| 3 | PICHANGA PUMPING SERVICE LLC | 58 | 4.9★ (70) | Mountain View, 13 mi away | Sat · Sun | — |
| 4 | $15 Sewer & Drain Service | 57 | 4.8★ (609) | San Jose, 21 mi away | 24/7 | — |
| 5 | All Hayward Plumbing, Drain & Sewer Co. | 56 | 5.0★ (43) | Hayward, 8 mi away | 24/7 | — |
| 6 | Elite Rooter | 56 | 4.7★ (1,298) | San Jose, 18 mi away | 24/7 | — |
| 7 | Mr. Rooter Plumbing of The Tri-Valley | 56 | 4.8★ (271) | San Ramon, 10 mi away | 24/7 | — |
| 8 | Caccia Home Services | 56 | 4.9★ (1,910) | Burlingame, 19 mi away | Sat · Sun · Evenings | Most reviews |
| 9 | Wizard Plumbing and Drain | 55 | 4.8★ (1,648) | San Mateo, 16 mi away | Sat · Sun · Evenings | — |
| 10 | Michael Gardner Plumbing | 55 | 5.0★ (94) | San Lorenzo, 9 mi away | 24/7 | — |
The 64 best septic service companies in Union City, ranked
Ordered by CR Score, a 0–100 score from ten published factors. Paid placement never changes the order.
Based in Hayward, 3 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 Mountain View, 13 mi away
58/100CR ScoreRanked #3 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 Jose, 21 mi away
57/100CR ScoreRanked #4 because of its Google rating and review volume: 4.8★ from 609 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Hayward, 8 mi away
56/100CR ScoreRanked #5 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.
#6 Elite Rooter
Based in San Jose, 18 mi away
56/100CR ScoreRanked #6 because of its Google rating and review volume: 4.7★ from 1,298 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in San Ramon, 10 mi away
56/100CR ScoreRanked #7 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 Burlingame, 19 mi away
56/100CR ScoreRanked #8 because of its Google rating and review volume: 4.9★ from 1,910 Google reviews, the most in Union City.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in San Mateo, 16 mi away
55/100CR 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 Lorenzo, 9 mi away
55/100CR 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 Hayward, 6 mi away
55/100CR ScoreRanked #11 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 Jose, 20 mi away
54/100CR ScoreRanked #12 because of its Google rating and review volume: 4.9★ from 433 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Sunnyvale, 15 mi away
54/100CR ScoreRanked #13 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 Sunnyvale, 15 mi away
54/100CR ScoreRanked #14 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 San Mateo, 16 mi away
53/100CR ScoreRanked #15 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, 6 mi away
53/100CR ScoreRanked #16 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 Discovery Bay, 18 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 Francisco, 25 mi away
53/100CR ScoreRanked #18 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 San Jose, 23 mi away
53/100CR ScoreRanked #19 because of its Google rating and review volume: 4.9★ from 409 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Alamo, 11 mi away
53/100CR ScoreRanked #20 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 Fremont, 10 mi away
53/100CR ScoreRanked #21 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.
Based in San Jose, 18 mi away
53/100CR ScoreRanked #22 because of its Google rating and trade focus: 4.5★ from 64 Google reviews, listed on Google as “Plumber”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Alamo, 22 mi away
52/100CR ScoreRanked #23 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 San Jose, 16 mi away
52/100CR ScoreRanked #24 because of its Google rating and review volume: 4.9★ from 157 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Redwood City, 16 mi away
52/100CR ScoreRanked #25 because of its Google rating and review volume: 4.9★ from 55 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 64 ranked septic service companies here; the rest are on their profiles.
Also serving Union City
12 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 | 22 mi | |
| Bay Area Restaurant Services LLC | 14 mi | |
| Campbell Sanitary Sewer Services | 23 mi | |
| Castro Valley's H & R Plumbing - Plumbing Sewer Repair and Installation, Drain Cleaner | 5 mi | |
| Handyman Plumbers Sewer & Drain Cleaning | 5.0★ (2) | 24 mi |
| J & G Trap Services | 5.0★ (1) | 24 mi |
| M.S Plumbing & Sewer Cleaner | 14 mi | |
| Reliable Union City Plumber | 5.0★ (10) | In Union City |
| Ring's Bobcat & Drilling Services | 5.0★ (1) | 23 mi |
| SDR Plumbing And Sewer | 5.0★ (1) | 16 mi |
| Septic Services in Oakland | 20 mi | |
| Sewer Rat Plumbing | 19 mi |
How we ranked Union City septic service companies
We scored 64 Union City 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 Union City 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 Union City: frequently asked questions
Who is the best septic service company in Union City?
By CR Score, the highest-ranked septic service company in Union City, 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 PICHANGA PUMPING SERVICE LLC (#3) follow. We ranked 64 septic service companies on ten factors, last updated November 3, 2026.
How many septic service companies are there in Union City?
ContractorsRanked ranks 64 septic service companies serving Union City, CA. Another 12 within 25 mi are listed but not ranked yet. Counts are as of November 2026.
Which septic service companies in Union City are open 24/7?
34 ranked septic service companies in Union City post 24/7 hours. The highest-ranked are Hydroworks Plumbing (#1), A-1 Septic Tank Service Inc (#2) and $15 Sewer & Drain Service (#4). Hours come from each business's Google listing as of November 2026, so call to confirm.
Which septic service companies in Union City work on weekends?
54 of 64 ranked septic service companies post Saturday hours and 42 post Sunday hours. The highest-ranked open Saturdays are Hydroworks Plumbing (#1), A-1 Septic Tank Service Inc (#2) and PICHANGA PUMPING SERVICE LLC (#3). Posted hours are office hours; crews may book weekend jobs separately.
What Google rating do Union City septic service companies have?
The median Google rating among 64 rated septic service companies in Union City is 4.8★, with a median of 31 reviews. Caccia Home Services has the most, 1,910 reviews, and ranks #8. 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 Union City count in this ranking?
Yes, if they are within 25 mi of the Union City 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 Union City
- November 2026: CR Scores recalculated for 64 septic service companies serving Union City.
More septic service companies and Union City pages
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