60/100CR Score
Ranked #1 because of its Google rating and review volume: 5.0★ from 346 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Best Septic Service Companies in Modesto, CA (2026)
29 septic service companies ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
The short answer
- 1
Best overall in Modesto: Top Tier Plumbing Inc., CR Score 60/100; 5.0★ from 346 Google reviews; open 24/7.
- 4
Best for emergencies (open 24/7): Roto-Rooter Plumbing & Water Cleanup, posts 24/7 hours; ranked #4 of 29.
- 4
Most-reviewed: Roto-Rooter Plumbing & Water Cleanup, 1,664 Google reviews at 4.7★, the most of 29 ranked; ranked #4.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
29 Modesto septic service companies are ranked here by CR Score, from ten published factors. 14 are open 24/7, 20 open Saturdays and 16 open Sundays, based on posted hours. The median Google rating is 4.7★ across 29 rated businesses.
Top 10 septic service companies in Modesto at a glance
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Top Tier Plumbing Inc. | 60 | 5.0★ (346) | Modesto | 24/7 | Overall |
| 2 | Pro Pumping Septic Service | 58 | 4.8★ (45) | Salida, 6 mi away | Sat · Sun | — |
| 3 | A-1 Septic Services | 57 | 4.7★ (111) | Modesto | — | — |
| 4 | Roto-Rooter Plumbing & Water Cleanup | 57 | 4.7★ (1,664) | Manteca, 16 mi away | 24/7 | Emergencies, Most reviews |
| 5 | Mountain Valley Pumping | 57 | 4.4★ (29) | Oakdale, 12 mi away | 24/7 | — |
| 6 | QuikFlush Septic Service, LLC | 56 | 5.0★ (29) | Atwater, 20 mi away | 24/7 | — |
| 7 | Elmore Quality Plumbing | 56 | 5.0★ (45) | Modesto | 24/7 | — |
| 8 | Stockton Septic Services | 55 | 4.6★ (34) | Stockton, 14 mi away | Sat · Sun · Evenings | — |
| 9 | Mountain Valley Septic | 55 | 4.5★ (8) | Oakdale, 12 mi away | 24/7 | — |
| 10 | Royal Plumbing Sewer & Drain | 54 | 5.0★ (7) | Modesto | 24/7 | — |
The 29 best septic service companies in Modesto, ranked
Ordered by CR Score, a 0–100 score from ten published factors. Paid placement never changes the order.
Based in Salida, 6 mi away
58/100CR ScoreRanked #2 because of its Google rating and trade focus: 4.8★ from 45 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Modesto
57/100CR ScoreRanked #3 because of its Google rating and trade focus: 4.7★ from 111 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Manteca, 16 mi away
57/100CR ScoreRanked #4 because of its Google rating and review volume: 4.7★ from 1,664 Google reviews, the most in Modesto.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Oakdale, 12 mi away
57/100CR ScoreRanked #5 because of its Google rating and trade focus: 4.4★ from 29 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Atwater, 20 mi away
56/100CR ScoreRanked #6 because of its Google rating and trade focus: 5.0★ from 29 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Modesto
56/100CR ScoreRanked #7 because of its Google rating and review volume: 5.0★ from 45 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Stockton, 14 mi away
55/100CR ScoreRanked #8 because of its Google rating and trade focus: 4.6★ 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 Oakdale, 12 mi away
55/100CR ScoreRanked #9 because of its Google rating and trade focus: 4.5★ from 8 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Modesto
54/100CR ScoreRanked #10 because of its Google rating and trade focus: 5.0★ from 7 Google reviews, listed on Google as “Plumber”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Modesto
54/100CR ScoreRanked #11 because of its Google rating and review volume: 4.5★ from 58 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Oakdale, 12 mi away
54/100CR 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 Modesto
53/100CR ScoreRanked #13 because of its Google rating and availability: 4.8★ from 19 Google reviews, open 24/7.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Hughson, 7 mi away
53/100CR ScoreRanked #14 because of its Google rating and trade focus: 3.4★ 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 Modesto
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 Manteca, 16 mi away
53/100CR ScoreRanked #16 because of its Google rating and review volume: 4.6★ from 253 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Modesto
53/100CR ScoreRanked #17 because of its Google rating and trade focus: 2.5★ from 13 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Stockton, 22 mi away
53/100CR ScoreRanked #18 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 Patterson, 12 mi away
52/100CR ScoreRanked #19 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 Escalon, 11 mi away
52/100CR ScoreRanked #20 because of its Google rating and review volume: 4.9★ from 149 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Ceres, 3 mi away
50/100CR ScoreRanked #21 because of its Google rating and availability: 3.3★ from 6 Google reviews, open 24/7.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Hughson, 9 mi away
50/100CR ScoreRanked #22 because of its Google rating and trade focus: 4.3★ from 4 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
#23 Thrifty Plumbing
Based in Riverbank, 7 mi away
49/100CR ScoreRanked #23 because of its Google rating and trade focus: 5.0★ from 11 Google reviews, listed on Google as “Plumber”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Manteca, 16 mi away
48/100CR ScoreRanked #24 because of its Google rating and trade focus: 4.6★ 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 Ceres, 5 mi away
48/100CR ScoreRanked #25 because of its Google rating and trade focus: 3.7★ from 3 Google reviews, listed on Google as “Plumber”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
All 29 septic service companies
#1 to #25 are shown in full above. Here are #26 to #29, in CR Score order; each links to its profile.
| Rank | Business | CR Score | Google rating | Distance |
|---|---|---|---|---|
| 26 | AAA Septic Inc. | 48 | 4.7★ (28) | 21 mi |
| 27 | Dutchman Drains & Plumbing | 46 | 5.0★ (7) | 3 mi |
| 28 | P&L Concrete Products | 43 | 3.5★ (28) | 11 mi |
| 29 | Sun Valley Pumping | 43 | 3.9★ (15) | 14 mi |
Also serving Modesto
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 |
|---|---|---|
| 1st Choice Sewer & Drain | 13 mi | |
| A Action Septic | In Modesto | |
| AAA Backhoe Service | 5.0★ (2) | 13 mi |
| All Valley Septic Service, Inc. | In Modesto | |
| Clark Septic Services LLC | 5.0★ (1) | 7 mi |
| Fuller Septic Services | 20 mi | |
| Gene's Septic Services | 7 mi | |
| JB Harvesting | 12 mi | |
| Mountain Valley Septic | In Modesto | |
| Mr. Rooter Plumbing of San Joaquin County | 22 mi | |
| United Rentals - Reliable Onsite Services | 5.0★ (2) | In Modesto |
| United Site Services | 2.0★ (2) | In Modesto |
| Watson Backhoe & Septic Install Services | 5.0★ (2) | In Modesto |
| Yates Wastewater Services Inc | 5.0★ (1) | 14 mi |
How we ranked Modesto septic service companies
We scored 29 Modesto 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 Modesto 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 Modesto: frequently asked questions
Who is the best septic service company in Modesto?
By CR Score, the highest-ranked septic service company in Modesto, CA is Top Tier Plumbing Inc. with a CR Score of 60/100. It has 5.0★ from 346 Google reviews. It is open 24/7. Pro Pumping Septic Service (#2) and A-1 Septic Services (#3) follow. We ranked 29 septic service companies on ten factors, last updated November 3, 2026.
How many septic service companies are there in Modesto?
ContractorsRanked ranks 29 septic service companies serving Modesto, CA. 8 of them are based in Modesto; the rest serve it from nearby towns. Another 14 within 25 mi are listed but not ranked yet. Counts are as of November 2026.
Which septic service companies in Modesto are open 24/7?
14 ranked septic service companies in Modesto post 24/7 hours. The highest-ranked are Top Tier Plumbing Inc. (#1), Roto-Rooter Plumbing & Water Cleanup (#4) and Mountain Valley Pumping (#5). Hours come from each business's Google listing as of November 2026, so call to confirm.
Which septic service companies in Modesto work on weekends?
20 of 29 ranked septic service companies post Saturday hours and 16 post Sunday hours. The highest-ranked open Saturdays are Top Tier Plumbing Inc. (#1), Pro Pumping Septic Service (#2) and Roto-Rooter Plumbing & Water Cleanup (#4). Posted hours are office hours; crews may book weekend jobs separately.
What Google rating do Modesto septic service companies have?
The median Google rating among 29 rated septic service companies in Modesto is 4.7★, with a median of 15 reviews. Roto-Rooter Plumbing & Water Cleanup has the most, 1,664 reviews, and ranks #4. 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 Modesto count in this ranking?
Yes, if they are within 25 mi of the Modesto 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 Modesto
- November 2026: CR Scores recalculated for 29 septic service companies serving Modesto.
More septic service companies and Modesto pages
Septic service companies near Modesto
- Septic service companies in Ceres, CA29 ranked
- Septic service companies in Salida, CA30 ranked
- Septic service companies in Riverbank, CA30 ranked
- Septic service companies in Ripon, CA31 ranked
- Septic service companies in Oakdale, CA29 ranked
- Septic service companies in Turlock, CA29 ranked
- Septic service companies in Patterson, CA24 ranked
- Septic service companies in Manteca, CA32 ranked
- Septic service companies in Delhi, CA26 ranked
- Septic service companies in Lathrop, CA32 ranked
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