62/100CR Score
Ranked #1 because of its Google rating and trade focus: 4.9★ from 72 Google reviews, listed on Google as “Septic system service”.
Best Septic Service Companies in Riverside, CA (2026)
102 septic service companies ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
The short answer
- 1
Best overall in Riverside: On Site Septic & Grease Pumping, CR Score 62/100; 4.9★ from 72 Google reviews; open 24/7.
- 2
Best for emergencies (open 24/7): Urgent Septic Solutions, posts 24/7 hours; ranked #2 of 102.
- 10
Most-reviewed: Option One Plumbing, 3,017 Google reviews at 4.8★, the most of 102 ranked; ranked #10.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
102 Riverside septic service companies are ranked here by CR Score, from ten published factors. 54 are open 24/7, 80 open Saturdays and 59 open Sundays, based on posted hours. The median Google rating is 4.9★ across 102 rated businesses.
Top 10 septic service companies in Riverside at a glance
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | On Site Septic & Grease Pumping | 62 | 4.9★ (72) | Riverside | 24/7 | Overall |
| 2 | Urgent Septic Solutions | 62 | 5.0★ (80) | Los Angeles, 3 mi away | 24/7 | Emergencies |
| 3 | Countywide Septic Pumping LLC | 59 | 4.5★ (120) | Jurupa Valley, 8 mi away | 24/7 | — |
| 4 | The big pumping solutions | 59 | 5.0★ (12) | Riverside | 24/7 | — |
| 5 | Liberty Septic Services | 59 | 5.0★ (12) | Los Angeles, 2 mi away | 24/7 | — |
| 6 | Mr. Rooter Plumbing of Riverside | 58 | 4.8★ (433) | Riverside | 24/7 | — |
| 7 | Rbc septic services | 58 | 5.0★ (11) | Los Angeles, 5 mi away | 24/7 | — |
| 8 | Mr. Rooter Plumbing of San Bernardino | 58 | 4.8★ (1,351) | Colton, 9 mi away | 24/7 | — |
| 9 | Aaa septic pumping | 58 | 4.6★ (45) | Fontana, 11 mi away | 24/7 | — |
| 10 | Option One Plumbing | 58 | 4.8★ (3,017) | Rancho Cucamonga, 14 mi away | 24/7 | Most reviews |
The 102 best septic service companies in Riverside, ranked
Ordered by CR Score, a 0–100 score from ten published factors. Paid placement never changes the order.
Scores below: based on 8 of 10 factors; credentials and recency not yet collected. Hatched segments mark factors we don't have yet.
Based in Los Angeles, 3 mi away
62/100CR ScoreRanked #2 because of its Google rating and trade focus: 5.0★ from 80 Google reviews, listed on Google as “Septic system service”.
Based in Jurupa Valley, 8 mi away
59/100CR ScoreRanked #3 because of its Google rating and trade focus: 4.5★ from 120 Google reviews, listed on Google as “Septic system service”.
Based in Riverside
59/100CR ScoreRanked #4 because of its Google rating and trade focus: 5.0★ from 12 Google reviews, listed on Google as “Septic system service”.
Based in Los Angeles, 2 mi away
59/100CR ScoreRanked #5 because of its Google rating and trade focus: 5.0★ from 12 Google reviews, listed on Google as “Septic system service”.
Based in Riverside
58/100CR ScoreRanked #6 because of its Google rating and review volume: 4.8★ from 433 Google reviews.
Based in Los Angeles, 5 mi away
58/100CR ScoreRanked #7 because of its Google rating and trade focus: 5.0★ from 11 Google reviews, listed on Google as “Septic system service”.
Based in Colton, 9 mi away
58/100CR ScoreRanked #8 because of its Google rating and review volume: 4.8★ from 1,351 Google reviews.
Based in Fontana, 11 mi away
58/100CR ScoreRanked #9 because of its Google rating and trade focus: 4.6★ from 45 Google reviews, listed on Google as “Septic system service”.
Based in Rancho Cucamonga, 14 mi away
58/100CR ScoreRanked #10 because of its Google rating and review volume: 4.8★ from 3,017 Google reviews, the most in Riverside.
Based in Bloomington, 8 mi away
57/100CR ScoreRanked #11 because of its Google rating and trade focus: 5.0★ from 11 Google reviews, listed on Google as “Septic system service”.
Based in Menifee, 15 mi away
57/100CR ScoreRanked #12 because of its Google rating and trade focus: 5.0★ from 33 Google reviews, listed on Google as “Septic system service”.
Based in Riverside
57/100CR ScoreRanked #13 because of its Google rating and review volume: 4.8★ from 219 Google reviews.
Based in San Bernardino, 14 mi away
57/100CR ScoreRanked #14 because of its Google rating and trade focus: 5.0★ from 21 Google reviews, listed on Google as “Septic system service”.
Based in Riverside
56/100CR ScoreRanked #15 because of its Google rating and trade focus: 3.1★ from 33 Google reviews, listed on Google as “Septic system service”.
Based in Azusa, 12 mi away
56/100CR ScoreRanked #16 because of its Google rating and trade focus: 5.0★ from 93 Google reviews, listed on Google as “Plumber”.
Based in Lake Elsinore, 20 mi away
56/100CR ScoreRanked #17 because of its Google rating and trade focus: 5.0★ from 31 Google reviews, listed on Google as “Septic system service”.
Based in Lake Elsinore, 19 mi away
56/100CR ScoreRanked #18 because of its Google rating and trade focus: 4.9★ from 231 Google reviews, listed on Google as “Septic system service”.
Based in Riverside
56/100CR ScoreRanked #19 because of its Google rating and trade focus: 3.3★ from 12 Google reviews, listed on Google as “Septic system service”.
#20 R.G Pumping Inc.
Based in Corona, 11 mi away
56/100CR ScoreRanked #20 because of its Google rating and trade focus: 4.7★ from 23 Google reviews, listed on Google as “Septic system service”.
Based in Rancho Cucamonga, 17 mi away
56/100CR ScoreRanked #21 because of its Google rating and review volume: 4.9★ from 756 Google reviews.
Based in Moreno Valley, 10 mi away
56/100CR ScoreRanked #22 because of its Google rating and trade focus: 4.8★ from 17 Google reviews, listed on Google as “Septic system service”.
Based in San Bernardino, 16 mi away
55/100CR ScoreRanked #23 because of its Google rating and review volume: 4.8★ from 881 Google reviews.
Based in San Bernardino, 13 mi away
55/100CR ScoreRanked #24 because of its Google rating and review volume: 4.8★ from 590 Google reviews.
Based in Fontana, 14 mi away
55/100CR ScoreRanked #25 because of its Google rating and review volume: 4.8★ from 588 Google reviews.
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 102 ranked septic service companies here; the rest are on their profiles.
Also serving Riverside
20 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 |
|---|---|---|
| Affordale Septic Pumping | 15 mi | |
| Atlantis Pumping, LLC | 9 mi | |
| Frank's Pumping | 1.0★ (1) | In Riverside |
| James Harris Backhoe | 15 mi | |
| Liz Septic | 5.0★ (2) | 13 mi |
| Mg plumbing and septic repair Llc | 5.0★ (2) | 15 mi |
| Mountain Septic Pumping & Porta Potties LLC | 15 mi | |
| Nazco Geotechnical Engineering | 4.0★ (1) | 13 mi |
| Neighborhood Pumping | In Riverside | |
| Quality Pumping Services inc. | 5.0★ (2) | 6 mi |
| Quick Fix Septic | In Riverside | |
| Riverside Septic System Services | 5.0★ (2) | 16 mi |
| S.S. Construction and Pumping | 13 mi | |
| Septic Pumping/ bombeo séptico | 6 mi | |
| Septic system assurance | In Riverside | |
| United Site Services | In Riverside | |
| United Site Services | 5.0★ (2) | 19 mi |
| White House Septic Tank | 5.0★ (1) | 24 mi |
| White House Septic Tank Pumping | 12 mi | |
| Wright Septic Tank Services | 5.0★ (1) | 20 mi |
How we ranked Riverside septic service companies
We scored 102 Riverside 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 Riverside 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 Riverside: frequently asked questions
Who is the best septic service company in Riverside?
By CR Score, the highest-ranked septic service company in Riverside, CA is On Site Septic & Grease Pumping with a CR Score of 62/100. It has 4.9★ from 72 Google reviews. It is open 24/7. Urgent Septic Solutions (#2) and Countywide Septic Pumping LLC (#3) follow. We ranked 102 septic service companies on ten factors, last updated November 3, 2026.
How many septic service companies are there in Riverside?
ContractorsRanked ranks 102 septic service companies serving Riverside, CA. 8 of them are based in Riverside; the rest serve it from nearby towns. Another 20 within 25 mi are listed but not ranked yet. Counts are as of November 2026.
Which septic service companies in Riverside are open 24/7?
54 ranked septic service companies in Riverside post 24/7 hours. The highest-ranked are On Site Septic & Grease Pumping (#1), Urgent Septic Solutions (#2) and Countywide Septic Pumping LLC (#3). Hours come from each business's Google listing as of November 2026, so call to confirm.
Which septic service companies in Riverside work on weekends?
80 of 102 ranked septic service companies post Saturday hours and 59 post Sunday hours. The highest-ranked open Saturdays are On Site Septic & Grease Pumping (#1), Urgent Septic Solutions (#2) and Countywide Septic Pumping LLC (#3). Posted hours are office hours; crews may book weekend jobs separately.
What Google rating do Riverside septic service companies have?
The median Google rating among 102 rated septic service companies in Riverside is 4.9★, with a median of 25 reviews. Option One Plumbing has the most, 3,017 reviews, and ranks #10. 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 Riverside count in this ranking?
Yes, if they are within 25 mi of the Riverside 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 Riverside
- November 2026: CR Scores recalculated for 102 septic service companies serving Riverside.
More septic service companies and Riverside pages
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