Ranked #1 in Monterey
Based in Monterey
59/100CR Score
Ranked #1 because of its Google rating and trade focus: 4.8★ from 86 Google reviews, listed on Google as “Plumber”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Best Septic Service Companies in Monterey, CA (2026)
18 septic service companies ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
The short answer
- 1
Best overall in Monterey: GP Piping. Monterey Plumbing Services/Sewer & Repipe Specialist, CR Score 59/100; 4.8★ from 86 Google reviews; open 24/7.
- 2
Best for emergencies (open 24/7): Mr. Rooter Plumbing of Monterey, posts 24/7 hours; ranked #2 of 18.
- 3
Most-reviewed: Roto-Rooter Plumbing & Water Cleanup, 877 Google reviews at 4.7★, the most of 18 ranked; ranked #3.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
18 Monterey septic service companies are ranked here by CR Score, from ten published factors. 9 are open 24/7, 13 open Saturdays and 11 open Sundays, based on posted hours. The median Google rating is 4.8★ across 18 rated businesses.
Top 10 septic service companies in Monterey at a glance
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | GP Piping. Monterey Plumbing Services/Sewer & Repipe Specialist | 59 | 4.8★ (86) | Monterey | 24/7 | Overall |
| 2 | Mr. Rooter Plumbing of Monterey | 59 | 4.8★ (296) | Monterey | 24/7 | Emergencies |
| 3 | Roto-Rooter Plumbing & Water Cleanup | 57 | 4.7★ (877) | Salinas, 14 mi away | 24/7 | Most reviews |
| 4 | Roto-Rooter Plumbing & Water Cleanup | 57 | 5.0★ (53) | Monterey | 24/7 | — |
| 5 | Alvarez Plumbing | 56 | 4.9★ (204) | Salinas, 14 mi away | 24/7 | — |
| 6 | Mark's Sewer & Drain Cleaning | 55 | 5.0★ (10) | Monterey | 24/7 | — |
| 7 | Salinas Septic Sewer Services | 55 | 5.0★ (10) | Salinas, 16 mi away | 24/7 | — |
| 8 | Rooter King Plumbing & Sewer Repair | 53 | 4.3★ (6) | Seaside, 3 mi away | 24/7 | — |
| 9 | United Site Services | 53 | 2.7★ (6) | Salinas, 15 mi away | 24/7 | — |
| 10 | Tom's Septic Tank Services Inc | 51 | 3.8★ (10) | Castroville, 14 mi away | — | — |
The 18 best septic service companies in Monterey, ranked
Ordered by CR Score, a 0–100 score from ten published factors. Paid placement never changes the order.
Based in Monterey
59/100CR ScoreRanked #2 because of its Google rating and review volume: 4.8★ from 296 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Salinas, 14 mi away
57/100CR ScoreRanked #3 because of its Google rating and review volume: 4.7★ from 877 Google reviews, the most in Monterey.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Monterey
57/100CR ScoreRanked #4 because of its Google rating and review volume: 5.0★ from 53 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Salinas, 14 mi away
56/100CR ScoreRanked #5 because of its Google rating and review volume: 4.9★ from 204 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Monterey
55/100CR ScoreRanked #6 because of its Google rating and trade focus: 5.0★ from 10 Google reviews, listed on Google as “Plumber”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Salinas, 16 mi away
55/100CR ScoreRanked #7 because of its Google rating and trade focus: 5.0★ from 10 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Seaside, 3 mi away
53/100CR ScoreRanked #8 because of its Google rating and trade focus: 4.3★ from 6 Google reviews, listed on Google as “Plumber”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Salinas, 15 mi away
53/100CR ScoreRanked #9 because of its Google rating and trade focus: 2.7★ from 6 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Castroville, 14 mi away
51/100CR ScoreRanked #10 because of its Google rating and trade focus: 3.8★ from 10 Google reviews, listed on Google as “Septic system service”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
#11 HNG Construction
Based in Salinas, 18 mi away
50/100CR ScoreRanked #11 because of its Google rating and trade focus: 5.0★ from 4 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Salinas, 17 mi away
49/100CR ScoreRanked #12 because of its Google rating and trade focus: 5.0★ from 3 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Monterey
47/100CR ScoreRanked #13 because of its Google rating and trade focus: 4.4★ from 12 Google reviews, listed on Google as “Construction company”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Prunedale, 16 mi away
47/100CR ScoreRanked #14 because of its Google rating and trade focus: 5.0★ from 6 Google reviews, listed on Google as “Plumber”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Salinas, 18 mi away
46/100CR ScoreRanked #15 because of its Google rating and trade focus: 5.0★ from 6 Google reviews, listed on Google as “Excavating contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
#16 Acme Plumbing
Based in Salinas, 15 mi away
45/100CR ScoreRanked #16 because of its Google rating and review volume: 4.1★ from 51 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Watsonville, 23 mi away
43/100CR ScoreRanked #17 because of its Google rating and review volume: 4.2★ from 37 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Salinas, 20 mi away
42/100CR ScoreRanked #18 because of its Google rating and trade focus: 4.3★ from 11 Google reviews, listed on Google as “Paving contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Also serving Monterey
5 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 |
|---|---|---|
| Al's Septic Tank Services | 5.0★ (2) | 16 mi |
| Roto-Rooter Plumbing & Water Cleanup | In Monterey | |
| Septic Tank Pumping | 4.0★ (1) | 18 mi |
| Tom's Septic Construction | 5.0★ (1) | 20 mi |
| Tom's Septic Tank Services | 1.0★ (1) | 23 mi |
How we ranked Monterey septic service companies
We scored 18 Monterey 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 Monterey 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 Monterey: frequently asked questions
Who is the best septic service company in Monterey?
By CR Score, the highest-ranked septic service company in Monterey, CA is GP Piping. Monterey Plumbing Services/Sewer & Repipe Specialist with a CR Score of 59/100. It has 4.8★ from 86 Google reviews. It is open 24/7. Mr. Rooter Plumbing of Monterey (#2) and Roto-Rooter Plumbing & Water Cleanup (#3) follow. We ranked 18 septic service companies on ten factors, last updated November 3, 2026.
How many septic service companies are there in Monterey?
ContractorsRanked ranks 18 septic service companies serving Monterey, CA. 5 of them are based in Monterey; the rest serve it from nearby towns. Another 5 within 25 mi are listed but not ranked yet. Counts are as of November 2026.
Which septic service companies in Monterey are open 24/7?
9 ranked septic service companies in Monterey post 24/7 hours. The highest-ranked are GP Piping. Monterey Plumbing Services/Sewer & Repipe Specialist (#1), Mr. Rooter Plumbing of Monterey (#2) and Roto-Rooter Plumbing & Water Cleanup (#3). Hours come from each business's Google listing as of November 2026, so call to confirm.
Which septic service companies in Monterey work on weekends?
13 of 18 ranked septic service companies post Saturday hours and 11 post Sunday hours. The highest-ranked open Saturdays are GP Piping. Monterey Plumbing Services/Sewer & Repipe Specialist (#1), Mr. Rooter Plumbing of Monterey (#2) and Roto-Rooter Plumbing & Water Cleanup (#3). Posted hours are office hours; crews may book weekend jobs separately.
What Google rating do Monterey septic service companies have?
The median Google rating among 18 rated septic service companies in Monterey is 4.8★, with a median of 11 reviews. Roto-Rooter Plumbing & Water Cleanup has the most, 877 reviews, and ranks #3. 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 Monterey count in this ranking?
Yes, if they are within 25 mi of the Monterey 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 Monterey
- November 2026: CR Scores recalculated for 18 septic service companies serving Monterey.
More septic service companies and Monterey pages
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