60/100CR Score
Ranked #1 because of its Google rating and review volume: 4.8★ from 3,017 Google reviews, the most in Ontario.
Best Septic Service Companies in Ontario, CA (2026)
113 septic service companies ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
The short answer
- 1
Best overall in Ontario: Option One Plumbing, CR Score 60/100; 4.8★ from 3,017 Google reviews; open 24/7.
- 2
Best for emergencies (open 24/7): Urgent Septic Solutions, posts 24/7 hours; ranked #2 of 113.
- 22
Most-reviewed: Western Rooter & Plumbing, 1,562 Google reviews at 4.9★, the most of 113 ranked after Option One Plumbing; ranked #22.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
113 Ontario septic service companies are ranked here by CR Score, from ten published factors. 66 are open 24/7, 94 open Saturdays and 75 open Sundays, based on posted hours. The median Google rating is 4.9★ across 113 rated businesses.
Top 10 septic service companies in Ontario at a glance
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Option One Plumbing | 60 | 4.8★ (3,017) | Rancho Cucamonga, 5 mi away | 24/7 | Overall |
| 2 | Urgent Septic Solutions | 59 | 5.0★ (80) | Los Angeles, 14 mi away | 24/7 | Emergencies |
| 3 | Quality Pumping Services Inc. | 59 | 5.0★ (11) | Ontario | 24/7 | — |
| 4 | Countywide Septic Pumping LLC | 59 | 4.5★ (120) | Jurupa Valley, 9 mi away | 24/7 | — |
| 5 | Scott McLeod Plumbing, Inc. | 59 | 4.9★ (756) | Rancho Cucamonga, 3 mi away | 24/7 | — |
| 6 | Aaa septic pumping | 58 | 4.6★ (45) | Fontana, 10 mi away | 24/7 | — |
| 7 | Bobby Blue Plumbing Rancho Cucamonga | 57 | 4.9★ (354) | Rancho Cucamonga, 6 mi away | 24/7 | — |
| 8 | EZ Sewers Rooter and Plumbing | 57 | 5.0★ (130) | Avocado Heights, 12 mi away | 24/7 | — |
| 9 | Utility Plumbing Services | 57 | 5.0★ (219) | Rancho Cucamonga, 5 mi away | 24/7 | — |
| 10 | On Site Septic & Grease Pumping | 56 | 4.9★ (72) | Riverside, 24 mi away | 24/7 | — |
The 113 best septic service companies in Ontario, 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, 14 mi away
59/100CR 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 Ontario
59/100CR ScoreRanked #3 because of its Google rating and trade focus: 5.0★ from 11 Google reviews, listed on Google as “Septic system service”.
Based in Jurupa Valley, 9 mi away
59/100CR ScoreRanked #4 because of its Google rating and trade focus: 4.5★ from 120 Google reviews, listed on Google as “Septic system service”.
Based in Rancho Cucamonga, 3 mi away
59/100CR ScoreRanked #5 because of its Google rating and review volume: 4.9★ from 756 Google reviews.
Based in Fontana, 10 mi away
58/100CR ScoreRanked #6 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, 6 mi away
57/100CR ScoreRanked #7 because of its Google rating and review volume: 4.9★ from 354 Google reviews.
Based in Avocado Heights, 12 mi away
57/100CR ScoreRanked #8 because of its Google rating and trade focus: 5.0★ from 130 Google reviews, listed on Google as “Plumber”.
Based in Rancho Cucamonga, 5 mi away
57/100CR ScoreRanked #9 because of its Google rating and review volume: 5.0★ from 219 Google reviews.
Based in Riverside, 24 mi away
56/100CR ScoreRanked #10 because of its Google rating and trade focus: 4.9★ from 72 Google reviews, listed on Google as “Septic system service”.
Based in Upland, 4 mi away
56/100CR ScoreRanked #11 because of its Google rating and review volume: 4.9★ from 147 Google reviews.
Based in Fontana, 11 mi away
56/100CR ScoreRanked #12 because of its Google rating and review volume: 4.8★ from 588 Google reviews.
#13 Reliable Septic
Based in Anaheim, 11 mi away
56/100CR ScoreRanked #13 because of its Google rating and trade focus: 5.0★ from 9 Google reviews, listed on Google as “Septic system service”.
Based in Glendora, 13 mi away
56/100CR ScoreRanked #14 because of its Google rating and trade focus: 4.9★ from 120 Google reviews, listed on Google as “Plumber”.
Based in Rancho Cucamonga, 4 mi away
56/100CR ScoreRanked #15 because of its Google rating and review volume: 4.7★ from 220 Google reviews.
Based in Bloomington, 14 mi away
56/100CR ScoreRanked #16 because of its Google rating and trade focus: 5.0★ from 11 Google reviews, listed on Google as “Septic system service”.
Based in Anaheim, 20 mi away
56/100CR ScoreRanked #17 because of its Google rating and trade focus: 5.0★ from 205 Google reviews, listed on Google as “Plumber”.
Based in Colton, 18 mi away
55/100CR ScoreRanked #18 because of its Google rating and review volume: 4.8★ from 1,351 Google reviews.
Based in Monrovia, 22 mi away
55/100CR ScoreRanked #19 because of its Google rating and trade focus: 5.0★ from 33 Google reviews, listed on Google as “Septic system service”.
Based in Hacienda Heights, 19 mi away
55/100CR ScoreRanked #20 because of its Google rating and trade focus: 4.9★ from 200 Google reviews, listed on Google as “Plumber”.
Based in Pomona, 6 mi away
55/100CR ScoreRanked #21 because of its Google rating and review volume: 4.9★ from 131 Google reviews.
Based in Arcadia, 22 mi away
55/100CR ScoreRanked #22 because of its Google rating and review volume: 4.9★ from 1,562 Google reviews.
Based in Azusa, 16 mi away
55/100CR ScoreRanked #23 because of its Google rating and trade focus: 5.0★ from 93 Google reviews, listed on Google as “Plumber”.
Based in Riverside, 13 mi away
55/100CR ScoreRanked #24 because of its Google rating and review volume: 4.8★ from 433 Google reviews.
Based in Fontana, 10 mi away
55/100CR ScoreRanked #25 because of its Google rating and trade focus: 4.2★ from 40 Google reviews, listed on Google as “Septic system service”.
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 113 ranked septic service companies here; the rest are on their profiles.
Also serving Ontario
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 |
|---|---|---|
| All Around Underground Contractors, Inc | 5.0★ (2) | 22 mi |
| Broce Developments | 5.0★ (2) | In Ontario |
| Ferguson | 4.6★ (41) | In Ontario |
| Frank's Pumping | 1.0★ (1) | 21 mi |
| GLPS Plumbing & Mechanical Srvs. | 5.0★ (1) | 21 mi |
| Liz Septic | 5.0★ (2) | In Ontario |
| Mg plumbing and septic repair Llc | 5.0★ (2) | 17 mi |
| Nazco Geotechnical Engineering | 4.0★ (1) | 23 mi |
| Penny Plumbing | 5 mi | |
| Quality Pumping Services inc. | 5.0★ (2) | 14 mi |
| Renowned Plumbing & Rooter | 3 mi | |
| S.S. Construction and Pumping | In Ontario | |
| Sewer King | 5.0★ (1) | 22 mi |
| Socal Sewer Plumbing Contractor INC | 4 mi | |
| The Home Depot | 4.4★ (1,765) | In Ontario |
| Tony's Rooter Service Sewer and Drain Paramedics | 5.0★ (1) | 18 mi |
| United Site Services | 5.0★ (1) | 17 mi |
| Upland Septic Services | In Ontario | |
| West Coast Environmental Services Inc. | In Ontario | |
| White House Septic Tank Pumping | In Ontario |
How we ranked Ontario septic service companies
We scored 113 Ontario 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 Ontario 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 Ontario: frequently asked questions
Who is the best septic service company in Ontario?
By CR Score, the highest-ranked septic service company in Ontario, CA is Option One Plumbing with a CR Score of 60/100. It has 4.8★ from 3,017 Google reviews. It is open 24/7. Urgent Septic Solutions (#2) and Quality Pumping Services Inc. (#3) follow. We ranked 113 septic service companies on ten factors, last updated November 3, 2026.
How many septic service companies are there in Ontario?
ContractorsRanked ranks 113 septic service companies serving Ontario, CA. 1 of them is based in Ontario; 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 Ontario are open 24/7?
66 ranked septic service companies in Ontario post 24/7 hours. The highest-ranked are Option One Plumbing (#1), Urgent Septic Solutions (#2) and Quality Pumping Services Inc. (#3). Hours come from each business's Google listing as of November 2026, so call to confirm.
Which septic service companies in Ontario work on weekends?
94 of 113 ranked septic service companies post Saturday hours and 75 post Sunday hours. The highest-ranked open Saturdays are Option One Plumbing (#1), Urgent Septic Solutions (#2) and Quality Pumping Services Inc. (#3). Posted hours are office hours; crews may book weekend jobs separately.
What Google rating do Ontario septic service companies have?
The median Google rating among 113 rated septic service companies in Ontario is 4.9★, with a median of 35 reviews. Option One Plumbing has the most, 3,017 reviews, and ranks #1. 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 Ontario count in this ranking?
Yes, if they are within 25 mi of the Ontario 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 Ontario
- November 2026: CR Scores recalculated for 113 septic service companies serving Ontario.
More septic service companies and Ontario pages
Septic service companies near Ontario
- Septic service companies in Upland, CA112 ranked
- Septic service companies in Montclair, CA105 ranked
- Septic service companies in Chino, CA120 ranked
- Septic service companies in Rancho Cucamonga, CA108 ranked
- Septic service companies in Claremont, CA106 ranked
- Septic service companies in Pomona, CA115 ranked
- Septic service companies in La Verne, CA106 ranked
- Septic service companies in Chino Hills, CA125 ranked
- Septic service companies in Eastvale, CA124 ranked
- Septic service companies in Jurupa Valley, CA110 ranked
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