61/100CR Score
Ranked #1 because of its Google rating and trade focus: 4.9★ from 282 Google reviews, listed on Google as “Septic system service”.
Best Septic Service Companies in Catonsville, MD (2026)
79 septic service companies ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
The short answer
- 1
Best overall in Catonsville: A-1 Septic, CR Score 61/100; 4.9★ from 282 Google reviews; open 24/7.
- 2
Best for emergencies (open 24/7): Jet Septic and Plumbing Services, posts 24/7 hours; ranked #2 of 79.
- 5
Most-reviewed: Prime Plumbing, 2,323 Google reviews at 4.8★, the most of 79 ranked; ranked #5.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
79 Catonsville septic service companies are ranked here by CR Score, from ten published factors. 30 are open 24/7, 45 open Saturdays and 35 open Sundays, based on posted hours. The median Google rating is 4.9★ across 79 rated businesses.
Top 10 septic service companies in Catonsville at a glance
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | A-1 Septic | 61 | 4.9★ (282) | Pasadena, 17 mi away | 24/7 | Overall |
| 2 | Jet Septic and Plumbing Services | 61 | 5.0★ (321) | Westminster, 20 mi away | 24/7 | Emergencies |
| 3 | A & V Septic Services LLC | 60 | 4.9★ (210) | Pasadena, 15 mi away | 24/7 | — |
| 4 | Sewer Slayer | 59 | 5.0★ (157) | Arbutus, 5 mi away | 24/7 | — |
| 5 | Prime Plumbing | 59 | 4.8★ (2,323) | Glen Burnie, 10 mi away | 24/7 | Most reviews |
| 6 | Shilling septic | 58 | 5.0★ (103) | Baltimore, 22 mi away | 24/7 | — |
| 7 | Mr. Rooter Plumbing of Greater Baltimore | 58 | 4.8★ (1,366) | Baltimore, 4 mi away | Sat · Sun · Evenings | — |
| 8 | RS Plumbing LLC | 57 | 5.0★ (51) | Davidsonville, 22 mi away | 24/7 | — |
| 9 | Young Septic Services | 56 | 4.9★ (1,057) | Westminster, 21 mi away | — | — |
| 10 | Arundel Septic Services LLC | 56 | 5.0★ (13) | Pasadena, 15 mi away | 24/7 | — |
The 79 best septic service companies in Catonsville, 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 Westminster, 20 mi away
61/100CR ScoreRanked #2 because of its Google rating and trade focus: 5.0★ from 321 Google reviews, listed on Google as “Septic system service”.
Based in Pasadena, 15 mi away
60/100CR ScoreRanked #3 because of its Google rating and trade focus: 4.9★ from 210 Google reviews, listed on Google as “Septic system service”.
#4 Sewer Slayer
Based in Arbutus, 5 mi away
59/100CR ScoreRanked #4 because of its Google rating and trade focus: 5.0★ from 157 Google reviews, listed on Google as “Plumber”.
Based in Glen Burnie, 10 mi away
59/100CR ScoreRanked #5 because of its Google rating and review volume: 4.8★ from 2,323 Google reviews, the most in Catonsville.
Based in Baltimore, 22 mi away
58/100CR ScoreRanked #6 because of its Google rating and trade focus: 5.0★ from 103 Google reviews, listed on Google as “Septic system service”.
Based in Baltimore, 4 mi away
58/100CR ScoreRanked #7 because of its Google rating and review volume: 4.8★ from 1,366 Google reviews.
Based in Davidsonville, 22 mi away
57/100CR ScoreRanked #8 because of its Google rating and trade focus: 5.0★ from 51 Google reviews, listed on Google as “Septic system service”.
Based in Westminster, 21 mi away
56/100CR ScoreRanked #9 because of its Google rating and trade focus: 4.9★ from 1,057 Google reviews, listed on Google as “Septic system service”.
Based in Pasadena, 15 mi away
56/100CR ScoreRanked #10 because of its Google rating and trade focus: 5.0★ from 13 Google reviews, listed on Google as “Septic system service”.
Based in Gaithersburg, 24 mi away
56/100CR ScoreRanked #11 because of its Google rating and trade focus: 5.0★ from 887 Google reviews, listed on Google as “Septic system service”.
Based in Crofton, 18 mi away
56/100CR ScoreRanked #12 because of its Google rating and trade focus: 5.0★ from 19 Google reviews, listed on Google as “Septic system service”.
Based in South Bel Air, 12 mi away
56/100CR ScoreRanked #13 because of its Google rating and trade focus: 4.6★ from 10 Google reviews, listed on Google as “Septic system service”.
#14 Fogle's Septic
Based in Eldersburg, 15 mi away
56/100CR ScoreRanked #14 because of its Google rating and trade focus: 4.0★ from 184 Google reviews, listed on Google as “Septic system service”.
#15 Mahon Plumbing
Based in Baltimore, 11 mi away
56/100CR ScoreRanked #15 because of its Google rating and review volume: 4.9★ from 268 Google reviews.
Based in Columbia, 14 mi away
56/100CR ScoreRanked #16 because of its Google rating and trade focus: 4.2★ from 16 Google reviews, listed on Google as “Septic system service”.
#17 Abend Services
Based in Baltimore, 7 mi away
55/100CR ScoreRanked #17 because of its Google rating and review volume: 4.8★ from 175 Google reviews.
Based in Pasadena, 14 mi away
55/100CR ScoreRanked #18 because of its Google rating and trade focus: 4.3★ from 13 Google reviews, listed on Google as “Septic system service”.
Based in Eldersburg, 19 mi away
55/100CR ScoreRanked #19 because of its Google rating and trade focus: 4.6★ from 22 Google reviews, listed on Google as “Septic system service”.
Based in Pasadena, 18 mi away
55/100CR ScoreRanked #20 because of its Google rating and trade focus: 4.7★ from 12 Google reviews, listed on Google as “Septic system service”.
Based in Pasadena, 15 mi away
55/100CR ScoreRanked #21 because of its Google rating and trade focus: 5.0★ from 5 Google reviews, listed on Google as “Septic system service”.
Based in Rosedale, 12 mi away
54/100CR ScoreRanked #22 because of its Google rating and trade focus: 4.6★ from 60 Google reviews, listed on Google as “Plumber”.
Based in Ferndale, 5 mi away
54/100CR ScoreRanked #23 because of its Google rating and review volume: 5.0★ from 109 Google reviews.
Based in Perry Hall, 18 mi away
54/100CR ScoreRanked #24 because of its Google rating and review volume: 5.0★ from 1,896 Google reviews.
Based in Baltimore, 10 mi away
54/100CR ScoreRanked #25 because of its Google rating and review volume: 4.9★ from 1,738 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 79 ranked septic service companies here; the rest are on their profiles.
Also serving Catonsville
15 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 |
|---|---|---|
| Accurate Environmental Services | 18 mi | |
| Baltimore | 11 mi | |
| Beetle Bayly Services | 1.0★ (1) | 22 mi |
| Bel Air Septic Service | 19 mi | |
| Capital City Sewer Services Inc | 5.0★ (1) | 23 mi |
| Chesapeake Bay Septic Tank | 24 mi | |
| Constipated Drain Sewer | 3.0★ (1) | 12 mi |
| Dennis Bosley Services | 5.0★ (2) | 24 mi |
| Electric EEL Sewer & Drain Cleaning | 19 mi | |
| King & Sons Inc LLC | 1.0★ (1) | 23 mi |
| MB Matthews Septic Service LLC | 5.0★ (1) | 12 mi |
| Pasadena Septic Service | 18 mi | |
| Plumbing - Clogged Drains & Sewer Pipes | 5.0★ (1) | 20 mi |
| Severn Septic Service | 10 mi | |
| Ultimate Septic & Construction | 12 mi |
How we ranked Catonsville septic service companies
We scored 79 Catonsville 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 Catonsville 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 Catonsville: frequently asked questions
Who is the best septic service company in Catonsville?
By CR Score, the highest-ranked septic service company in Catonsville, MD is A-1 Septic with a CR Score of 61/100. It has 4.9★ from 282 Google reviews. It is open 24/7. Jet Septic and Plumbing Services (#2) and A & V Septic Services LLC (#3) follow. We ranked 79 septic service companies on ten factors, last updated November 3, 2026.
How many septic service companies are there in Catonsville?
ContractorsRanked ranks 79 septic service companies serving Catonsville, MD. 1 of them is based in Catonsville; the rest serve it from nearby towns. Another 15 within 25 mi are listed but not ranked yet. Counts are as of November 2026.
Which septic service companies in Catonsville are open 24/7?
30 ranked septic service companies in Catonsville post 24/7 hours. The highest-ranked are A-1 Septic (#1), Jet Septic and Plumbing Services (#2) and A & V Septic Services LLC (#3). Hours come from each business's Google listing as of November 2026, so call to confirm.
Which septic service companies in Catonsville work on weekends?
45 of 79 ranked septic service companies post Saturday hours and 35 post Sunday hours. The highest-ranked open Saturdays are A-1 Septic (#1), Jet Septic and Plumbing Services (#2) and A & V Septic Services LLC (#3). Posted hours are office hours; crews may book weekend jobs separately.
What Google rating do Catonsville septic service companies have?
The median Google rating among 79 rated septic service companies in Catonsville is 4.9★, with a median of 20 reviews. Prime Plumbing has the most, 2,323 reviews, and ranks #5. 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 Catonsville count in this ranking?
Yes, if they are within 25 mi of the Catonsville 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 Catonsville
- November 2026: CR Scores recalculated for 79 septic service companies serving Catonsville.
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