61/100CR Score
Ranked #1 because of its Google rating and trade focus: 5.0★ from 33 Google reviews, listed on Google as “Septic system service”.
Best Septic Service Companies in Monrovia, CA (2026)
107 septic service companies ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
The short answer
- 1
Best overall in Monrovia: Sewer Kingz Plumbing & Rooter, CR Score 61/100; 5.0★ from 33 Google reviews; open 24/7.
- 2
Best for emergencies (open 24/7): Western Rooter & Plumbing, posts 24/7 hours; ranked #2 of 107.
- 15
Most-reviewed: Option One Plumbing, 3,017 Google reviews at 4.8★, the most of 107 ranked; ranked #15.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
107 Monrovia septic service companies are ranked here by CR Score, from ten published factors. 62 are open 24/7, 92 open Saturdays and 75 open Sundays, based on posted hours. The median Google rating is 4.9★ across 107 rated businesses.
Top 10 septic service companies in Monrovia at a glance
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Sewer Kingz Plumbing & Rooter | 61 | 5.0★ (33) | Monrovia | 24/7 | Overall |
| 2 | Western Rooter & Plumbing | 60 | 4.9★ (1,562) | Arcadia, 2 mi away | 24/7 | Emergencies |
| 3 | Hassle Free Plumbing | 58 | 4.9★ (266) | Monrovia | 24/7 | — |
| 4 | I Love Sewers Rooter And Plumbing Sewer Specialties Inc | 57 | 4.9★ (200) | Hacienda Heights, 11 mi away | 24/7 | — |
| 5 | SWE Sewer Solutions Construction & Engineering | 57 | 4.9★ (120) | Glendora, 8 mi away | 24/7 | — |
| 6 | Drainiacs Sewer and Drain | 57 | 4.8★ (295) | Whittier, 14 mi away | 24/7 | — |
| 7 | EZ Sewers Rooter and Plumbing | 57 | 5.0★ (130) | Avocado Heights, 12 mi away | 24/7 | — |
| 8 | High Speed Rooter & Plumbing | 57 | 4.8★ (362) | El Monte, 6 mi away | 24/7 | — |
| 9 | Reliable Septic | 56 | 5.0★ (9) | Anaheim, 12 mi away | 24/7 | — |
| 10 | Jetters 'N' Drains Sewer & Pipe Lining Experts | 55 | 5.0★ (205) | Anaheim, 21 mi away | 24/7 | — |
The 107 best septic service companies in Monrovia, 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 Arcadia, 2 mi away
60/100CR ScoreRanked #2 because of its Google rating and review volume: 4.9★ from 1,562 Google reviews.
Based in Monrovia
58/100CR ScoreRanked #3 because of its Google rating and review volume: 4.9★ from 266 Google reviews.
Based in Hacienda Heights, 11 mi away
57/100CR ScoreRanked #4 because of its Google rating and trade focus: 4.9★ from 200 Google reviews, listed on Google as “Plumber”.
Based in Glendora, 8 mi away
57/100CR ScoreRanked #5 because of its Google rating and trade focus: 4.9★ from 120 Google reviews, listed on Google as “Plumber”.
Based in Whittier, 14 mi away
57/100CR ScoreRanked #6 because of its Google rating and review volume: 4.8★ from 295 Google reviews.
Based in Avocado Heights, 12 mi away
57/100CR ScoreRanked #7 because of its Google rating and trade focus: 5.0★ from 130 Google reviews, listed on Google as “Plumber”.
Based in El Monte, 6 mi away
57/100CR ScoreRanked #8 because of its Google rating and review volume: 4.8★ from 362 Google reviews.
Based in Anaheim, 12 mi away
56/100CR ScoreRanked #9 because of its Google rating and trade focus: 5.0★ from 9 Google reviews, listed on Google as “Septic system service”.
Based in Anaheim, 21 mi away
55/100CR ScoreRanked #10 because of its Google rating and trade focus: 5.0★ from 205 Google reviews, listed on Google as “Plumber”.
Based in Glendora, 8 mi away
55/100CR ScoreRanked #11 because of its Google rating and trade focus: 4.8★ from 51 Google reviews, listed on Google as “Plumber”.
Based in Los Angeles, 16 mi away
55/100CR ScoreRanked #12 because of its Google rating and trade focus: 5.0★ from 13 Google reviews, listed on Google as “Septic system service”.
Based in Long Beach, 21 mi away
55/100CR ScoreRanked #13 because of its Google rating and review volume: 4.9★ from 1,140 Google reviews.
Based in La Cañada Flintridge, 13 mi away
55/100CR ScoreRanked #14 because of its Google rating and trade focus: 4.4★ from 12 Google reviews, listed on Google as “Septic system service”.
Based in Rancho Cucamonga, 25 mi away
55/100CR ScoreRanked #15 because of its Google rating and review volume: 4.8★ from 3,017 Google reviews, the most in Monrovia.
Based in Lancaster, 19 mi away
55/100CR ScoreRanked #16 because of its Google rating and trade focus: 4.7★ from 26 Google reviews, listed on Google as “Septic system service”.
Based in Pasadena, 9 mi away
55/100CR ScoreRanked #17 because of its Google rating and trade focus: 4.9★ from 215 Google reviews, listed on Google as “Plumber”.
Based in Rancho Cucamonga, 22 mi away
54/100CR ScoreRanked #18 because of its Google rating and review volume: 4.9★ from 756 Google reviews.
Based in Cerritos, 20 mi away
54/100CR ScoreRanked #19 because of its Google rating and trade focus: 5.0★ from 102 Google reviews, listed on Google as “Plumber”.
Based in Ontario, 20 mi away
54/100CR ScoreRanked #20 because of its Google rating and trade focus: 5.0★ from 11 Google reviews, listed on Google as “Septic system service”.
Based in La Habra, 16 mi away
54/100CR ScoreRanked #21 because of its Google rating and review volume: 4.9★ from 661 Google reviews.
Based in Burbank, 19 mi away
54/100CR ScoreRanked #22 because of its Google rating and trade focus: 4.9★ from 83 Google reviews, listed on Google as “Plumber”.
Based in Glendale, 15 mi away
54/100CR ScoreRanked #23 because of its Google rating and trade focus: 4.9★ from 50 Google reviews, listed on Google as “Plumber”.
Based in Anaheim, 22 mi away
54/100CR ScoreRanked #24 because of its Google rating and review volume: 4.9★ from 560 Google reviews.
Based in La Puente, 8 mi away
54/100CR ScoreRanked #25 because of its Google rating and review volume: 4.6★ from 166 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 107 ranked septic service companies here; the rest are on their profiles.
Also serving Monrovia
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 |
|---|---|---|
| Burbank Sewer Srevices | 5.0★ (2) | 20 mi |
| Coblentz Plumbing & Sewer Contractors | 5.0★ (1) | 23 mi |
| Discounted Rooter, West Covina CA | 8 mi | |
| Dustin Plumbing, Drain & Sewer | 1.0★ (1) | 23 mi |
| GLPS Plumbing & Mechanical Srvs. | 5.0★ (1) | 6 mi |
| Grbcon, Inc. | 4 mi | |
| Guilherme Engineering | 12 mi | |
| Liz Septic | 5.0★ (2) | 24 mi |
| Los Angeles Septic Service & Drain Clean | 1.0★ (1) | 21 mi |
| LosAngelesSepticCertification | 11 mi | |
| Plumber Pasadena Sewer Cleaning | 5.0★ (1) | 7 mi |
| Plumbing Buddies - Plumber, Tankless Water Heater Replacement & Water Heater Removal, Sewer Repair & Pipe Installation in Glendora, CA | 8 mi | |
| Pumped up | 7 mi | |
| Reliant Septic Pumping | 1.0★ (1) | 19 mi |
| SEWER CAMERA INSPECTION | 5.0★ (1) | 14 mi |
| The Home Depot | 4.3★ (2,365) | In Monrovia |
| Tony's Rooter Service Sewer and Drain Paramedics | 5.0★ (1) | 4 mi |
| United Site Services | 5.0★ (1) | 4 mi |
| United Site Services | 7 mi | |
| Xclusive Pipeline & Sewer | 7 mi |
How we ranked Monrovia septic service companies
We scored 107 Monrovia 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 Monrovia 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 Monrovia: frequently asked questions
Who is the best septic service company in Monrovia?
By CR Score, the highest-ranked septic service company in Monrovia, CA is Sewer Kingz Plumbing & Rooter with a CR Score of 61/100. It has 5.0★ from 33 Google reviews. It is open 24/7. Western Rooter & Plumbing (#2) and Hassle Free Plumbing (#3) follow. We ranked 107 septic service companies on ten factors, last updated November 3, 2026.
How many septic service companies are there in Monrovia?
ContractorsRanked ranks 107 septic service companies serving Monrovia, CA. 2 of them are based in Monrovia; 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 Monrovia are open 24/7?
62 ranked septic service companies in Monrovia post 24/7 hours. The highest-ranked are Sewer Kingz Plumbing & Rooter (#1), Western Rooter & Plumbing (#2) and Hassle Free Plumbing (#3). Hours come from each business's Google listing as of November 2026, so call to confirm.
Which septic service companies in Monrovia work on weekends?
92 of 107 ranked septic service companies post Saturday hours and 75 post Sunday hours. The highest-ranked open Saturdays are Sewer Kingz Plumbing & Rooter (#1), Western Rooter & Plumbing (#2) and Hassle Free Plumbing (#3). Posted hours are office hours; crews may book weekend jobs separately.
What Google rating do Monrovia septic service companies have?
The median Google rating among 107 rated septic service companies in Monrovia is 4.9★, with a median of 37 reviews. Option One Plumbing has the most, 3,017 reviews, and ranks #15. 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 Monrovia count in this ranking?
Yes, if they are within 25 mi of the Monrovia 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 Monrovia
- November 2026: CR Scores recalculated for 107 septic service companies serving Monrovia.
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