61/100CR Score
Ranked #1 because of its Google rating and trade focus: 5.0★ from 15 Google reviews, listed on Google as “Septic system service”.
Best Septic Service Companies in Castle Rock, CO (2026)
43 septic service companies ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
The short answer
- 1
Best overall in Castle Rock: American Pumping Inc, CR Score 61/100; 5.0★ from 15 Google reviews; open 24/7.
- 2
Best for emergencies (open 24/7): Elizabeth Septic & Drain Medics, posts 24/7 hours; ranked #2 of 43.
- 6
Most-reviewed: Southside Plumbing, 848 Google reviews at 4.9★, the most of 43 ranked; ranked #6.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
43 Castle Rock septic service companies are ranked here by CR Score, from ten published factors. 10 are open 24/7, 25 open Saturdays and 20 open Sundays, based on posted hours. The median Google rating is 4.9★ across 43 rated businesses.
Top 10 septic service companies in Castle Rock at a glance
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | American Pumping Inc | 61 | 5.0★ (15) | Castle Rock | 24/7 | Overall |
| 2 | Elizabeth Septic & Drain Medics | 60 | 5.0★ (9) | Castle Rock | 24/7 | Emergencies |
| 3 | Tank It Easy Castle Rock | 59 | 5.0★ (105) | Centennial, 4 mi away | Evenings | — |
| 4 | Garvin's Plumbing and Sewer | 58 | 4.8★ (815) | Englewood, 22 mi away | 24/7 | — |
| 5 | Pipe One, LLC | 58 | 4.7★ (13) | Castle Rock | Sat · Sun | — |
| 6 | Southside Plumbing | 56 | 4.9★ (848) | Littleton, 16 mi away | Sat · Sun | Most reviews |
| 7 | Quality Septic Pumping and Service | 56 | 4.7★ (62) | Aurora, 19 mi away | Sat · Sun | — |
| 8 | King Rooter & Plumbing | Plumbers Denver, CO | Drain Cleaning | Sewer & Water Line | Tankless Water Heater Repair | 56 | 4.7★ (479) | Denver, 25 mi away | 24/7 | — |
| 9 | Dig It Sewer Repair | 56 | 5.0★ (43) | Lakewood, 5 mi away | Sat · Sun · Evenings | — |
| 10 | Tank It Easy Elizabeth | 56 | 5.0★ (74) | Centennial, 13 mi away | Evenings | — |
The 43 best septic service companies in Castle Rock, 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 Castle Rock
60/100CR ScoreRanked #2 because of its Google rating and trade focus: 5.0★ from 9 Google reviews, listed on Google as “Septic system service”.
Based in Centennial, 4 mi away
59/100CR ScoreRanked #3 because of its Google rating and trade focus: 5.0★ from 105 Google reviews, listed on Google as “Septic system service”.
Based in Englewood, 22 mi away
58/100CR ScoreRanked #4 because of its Google rating and review volume: 4.8★ from 815 Google reviews.
Based in Castle Rock
58/100CR ScoreRanked #5 because of its Google rating and trade focus: 4.7★ from 13 Google reviews, listed on Google as “Septic system service”.
Based in Littleton, 16 mi away
56/100CR ScoreRanked #6 because of its Google rating and review volume: 4.9★ from 848 Google reviews, the most in Castle Rock.
Based in Aurora, 19 mi away
56/100CR ScoreRanked #7 because of its Google rating and trade focus: 4.7★ from 62 Google reviews, listed on Google as “Septic system service”.
Based in Denver, 25 mi away
56/100CR ScoreRanked #8 because of its Google rating and review volume: 4.7★ from 479 Google reviews.
Based in Lakewood, 5 mi away
56/100CR ScoreRanked #9 because of its Google rating and trade focus: 5.0★ from 43 Google reviews, listed on Google as “Excavating contractor”.
Based in Centennial, 13 mi away
56/100CR ScoreRanked #10 because of its Google rating and trade focus: 5.0★ from 74 Google reviews, listed on Google as “Septic system service”.
Based in Centennial, 17 mi away
56/100CR ScoreRanked #11 because of its Google rating and review volume: 5.0★ from 203 Google reviews.
Based in Centennial, 9 mi away
55/100CR ScoreRanked #12 because of its Google rating and trade focus: 3.9★ from 25 Google reviews, listed on Google as “Septic system service”.
#13 Drain Terrier
Based in Littleton, 20 mi away
55/100CR ScoreRanked #13 because of its Google rating and review volume: 4.8★ from 416 Google reviews.
#14 TBC Septic
Based in Centennial, 6 mi away
55/100CR ScoreRanked #14 because of its Google rating and trade focus: 4.7★ from 34 Google reviews, listed on Google as “Septic system service”.
Based in Columbine, 20 mi away
55/100CR ScoreRanked #15 because of its Google rating and trade focus: 4.9★ from 75 Google reviews, listed on Google as “Plumber”.
Based in Castle Rock
55/100CR ScoreRanked #16 because of its Google rating and trade focus: 5.0★ from 5 Google reviews, listed on Google as “Plumber”.
Based in Denver, 23 mi away
54/100CR ScoreRanked #17 because of its Google rating and trade focus: 4.8★ from 22 Google reviews, listed on Google as “Septic system service”.
Based in Denver, 24 mi away
54/100CR ScoreRanked #18 because of its Google rating and review volume: 4.9★ from 525 Google reviews.
Based in Denver, 18 mi away
53/100CR ScoreRanked #19 because of its Google rating and review volume: 4.6★ from 222 Google reviews.
Based in Centennial, 16 mi away
53/100CR ScoreRanked #20 because of its Google rating and trade focus: 4.9★ from 31 Google reviews, listed on Google as “Septic system service”.
Based in Thornton, 23 mi away
53/100CR ScoreRanked #21 because of its Google rating and trade focus: 5.0★ from 26 Google reviews, listed on Google as “Septic system service”.
Based in Applewood, 16 mi away
53/100CR ScoreRanked #22 because of its Google rating and trade focus: 4.9★ from 91 Google reviews, listed on Google as “Plumber”.
#23 John Todd Co
Based in Centennial, 10 mi away
53/100CR ScoreRanked #23 because of its Google rating and trade focus: 4.4★ from 28 Google reviews, listed on Google as “Septic system service”.
#24 Septic Daddy
Based in Centennial, 7 mi away
53/100CR ScoreRanked #24 because of its Google rating and trade focus: 4.1★ from 17 Google reviews, listed on Google as “Septic system service”.
Based in Aurora, 19 mi away
52/100CR ScoreRanked #25 because of its Google rating and trade focus: 5.0★ from 26 Google reviews, listed on Google as “Septic system service”.
All 43 septic service companies
#1 to #25 are shown in full above. Here are #26 to #43, in CR Score order; each links to its profile.
| Rank | Business | CR Score | Google rating | Distance |
|---|---|---|---|---|
| 26 | Absolute Diversified Services, LLC | 52 | 4.7★ (35) | 19 mi |
| 27 | Eclipse Sewer Services, LLC | 52 | 5.0★ (30) | 5 mi |
| 28 | Land Systems West Waterfalls, Ponds and Septic | 52 | 4.3★ (12) | 12 mi |
| 29 | Aver Septic | 51 | 4.8★ (19) | 19 mi |
| 30 | Douglas sewer lines llc | 50 | 5.0★ (22) | 24 mi |
| 31 | 247 Drain & Sewer Services | 50 | 5.0★ (10) | 18 mi |
| 32 | Uneek Septic Services | 49 | 4.8★ (19) | 24 mi |
| 33 | MDS & Son's Consulting | 49 | 4.5★ (6) | 24 mi |
| 34 | Atlas Excavating & Septic | 49 | 5.0★ (4) | 17 mi |
| 35 | K & A Mechanical | 48 | 3.4★ (20) | 19 mi |
| 36 | Tank It Easy Aurora | 48 | 5.0★ (6) | 24 mi |
| 37 | Rocky Mountain Sewer Jet Inc | 48 | 4.6★ (27) | 15 mi |
| 38 | Rocky Mountain Sewer | 48 | 5.0★ (3) | 24 mi |
| 39 | NextGen Plumbing | 47 | 5.0★ (23) | 12 mi |
| 40 | Colorado Elite Outdoor Contractors | 47 | 4.8★ (30) | 16 mi |
| 41 | Denver Plumbing Pros | 46 | 2.6★ (19) | 11 mi |
| 42 | Sewer Guys | 46 | 5.0★ (6) | 24 mi |
| 43 | Potter Excavation Services | 44 | 4.8★ (5) | 19 mi |
Also serving Castle Rock
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 |
|---|---|---|
| AAR Sewer & Water - Aurora | 21 mi | |
| AE Wastewater | 5.0★ (1) | In Castle Rock |
| Colorado Septic Maintenance & Repair | 6 mi | |
| Elite Rooter | 16 mi | |
| Kremer Construction LLC | 4.2★ (5) | In Castle Rock |
| Lyons Pumping | 7 mi | |
| Mario's Plumbing & Sewer Services | 21 mi | |
| MC Water And Sewer LLC | 21 mi | |
| My Plumbing and Sewer Aurora Pro | 5.0★ (2) | 20 mi |
| Sewer Lines Parker | 22 mi | |
| Smith Sewer Services LLC | 21 mi | |
| TCF Sewer & Excavating | 24 mi | |
| The Sewer Network | 22 mi | |
| Vohs General Services | 5.0★ (2) | 24 mi |
How we ranked Castle Rock septic service companies
We scored 43 Castle Rock 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 5, 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 Castle Rock 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 Castle Rock: frequently asked questions
Who is the best septic service company in Castle Rock?
By CR Score, the highest-ranked septic service company in Castle Rock, CO is American Pumping Inc with a CR Score of 61/100. It has 5.0★ from 15 Google reviews. It is open 24/7. Elizabeth Septic & Drain Medics (#2) and Tank It Easy Castle Rock (#3) follow. We ranked 43 septic service companies on ten factors, last updated November 5, 2026.
How many septic service companies are there in Castle Rock?
ContractorsRanked ranks 43 septic service companies serving Castle Rock, CO. 4 of them are based in Castle Rock; 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 Castle Rock are open 24/7?
10 ranked septic service companies in Castle Rock post 24/7 hours. The highest-ranked are American Pumping Inc (#1), Elizabeth Septic & Drain Medics (#2) and Garvin's Plumbing and Sewer (#4). Hours come from each business's Google listing as of November 2026, so call to confirm.
Which septic service companies in Castle Rock work on weekends?
25 of 43 ranked septic service companies post Saturday hours and 20 post Sunday hours. The highest-ranked open Saturdays are American Pumping Inc (#1), Elizabeth Septic & Drain Medics (#2) and Garvin's Plumbing and Sewer (#4). Posted hours are office hours; crews may book weekend jobs separately.
What Google rating do Castle Rock septic service companies have?
The median Google rating among 43 rated septic service companies in Castle Rock is 4.9★, with a median of 26 reviews. Southside Plumbing has the most, 848 reviews, and ranks #6. 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 Castle Rock count in this ranking?
Yes, if they are within 25 mi of the Castle Rock 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 Castle Rock
- November 2026: CR Scores recalculated for 43 septic service companies serving Castle Rock.
- November 2026: 1 duplicate listing merged.
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