60/100CR Score
Ranked #1 because of its Google rating and trade focus: 5.0★ from 34 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Best Septic Service Companies in Rosamond, CA (2026)
15 septic service companies ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
The short answer
- 1
Best overall in Rosamond: M8 Plumbing Inc., CR Score 60/100; 5.0★ from 34 Google reviews; open 24/7.
- 2
Best for emergencies (open 24/7): Roto-Rooter Plumbing & Water Cleanup, posts 24/7 hours; ranked #2 of 15.
- 5
Most-reviewed: Roto-Rooter Plumbing & Water Cleanup, 625 Google reviews at 4.4★, the most of 15 ranked; ranked #5.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
15 Rosamond septic service companies are ranked here by CR Score, from ten published factors. 10 are open 24/7, 13 open Saturdays and 11 open Sundays, based on posted hours. The median Google rating is 4.7★ across 15 rated businesses.
Most of this list also appears on the Septic service companies in Lancaster ranking. See Septic service companies in Lancaster
Top 10 septic service companies in Rosamond at a glance
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | M8 Plumbing Inc. | 60 | 5.0★ (34) | Lancaster, 7 mi away | 24/7 | Overall |
| 2 | Roto-Rooter Plumbing & Water Cleanup | 56 | 4.7★ (352) | Lancaster, 15 mi away | 24/7 | Emergencies |
| 3 | Big Flow Drain Company - Plumbing & Sewer | 55 | 5.0★ (43) | Lancaster, 13 mi away | 24/7 | — |
| 4 | Blue Muscle Plumbing And Rooter Service | 55 | 5.0★ (295) | Lancaster, 12 mi away | Sat · Evenings | — |
| 5 | Roto-Rooter Plumbing & Water Cleanup | 55 | 4.4★ (625) | California City, 17 mi away | 24/7 | Most reviews |
| 6 | Mr. Rooter Plumbing of Palmdale | 53 | 4.7★ (193) | Lancaster, 20 mi away | 24/7 | — |
| 7 | Septic Works | 53 | 4.8★ (12) | Lancaster, 20 mi away | Sat · Sun | — |
| 8 | JT Sanitation Septic and Sewer Co. | 53 | 4.5★ (13) | Lancaster, 12 mi away | Sat | — |
| 9 | Brothers Plumbing And Septic | 52 | 4.4★ (15) | Lancaster, 15 mi away | 24/7 | — |
| 10 | Jim's Sanitation | 51 | 4.2★ (20) | Palmdale, 20 mi away | — | — |
The 15 best septic service companies in Rosamond, ranked
Ordered by CR Score, a 0–100 score from ten published factors. Paid placement never changes the order.
Based in Lancaster, 15 mi away
56/100CR ScoreRanked #2 because of its Google rating and review volume: 4.7★ from 352 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Lancaster, 13 mi away
55/100CR ScoreRanked #3 because of its Google rating and trade focus: 5.0★ from 43 Google reviews, listed on Google as “Plumber”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Lancaster, 12 mi away
55/100CR ScoreRanked #4 because of its Google rating and review volume: 5.0★ from 295 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in California City, 17 mi away
55/100CR ScoreRanked #5 because of its Google rating and review volume: 4.4★ from 625 Google reviews, the most in Rosamond.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Lancaster, 20 mi away
53/100CR ScoreRanked #6 because of its Google rating and review volume: 4.7★ from 193 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
#7 Septic Works
Based in Lancaster, 20 mi away
53/100CR ScoreRanked #7 because of its Google rating and trade focus: 4.8★ from 12 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Lancaster, 12 mi away
53/100CR ScoreRanked #8 because of its Google rating and trade focus: 4.5★ from 13 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Lancaster, 15 mi away
52/100CR ScoreRanked #9 because of its Google rating and trade focus: 4.4★ from 15 Google reviews, listed on Google as “Plumber”.
Based on 8 of 10 factors; credentials and recency not yet collected.
#10 Jim's Sanitation
Based in Palmdale, 20 mi away
51/100CR ScoreRanked #10 because of its Google rating and trade focus: 4.2★ from 20 Google reviews, listed on Google as “Septic system service”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
Based in Palmdale, 15 mi away
50/100CR ScoreRanked #11 because of its Google rating and trade focus: 4.5★ from 16 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Irvine, 17 mi away
50/100CR ScoreRanked #12 because of its Google rating and availability: 5.0★ from 17 Google reviews, open 24/7.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Lancaster, 14 mi away
49/100CR ScoreRanked #13 because of its Google rating and availability: 4.2★ from 16 Google reviews, open 24/7.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Lancaster, 13 mi away
49/100CR ScoreRanked #14 because of its Google rating and availability: 3.9★ from 14 Google reviews, open 24/7.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Palmdale, 18 mi away
46/100CR ScoreRanked #15 because of its Google rating and availability: 5.0★ from 3 Google reviews, open 24/7.
Based on 8 of 10 factors; credentials and recency not yet collected.
How we ranked Rosamond septic service companies
We scored 15 Rosamond 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 Rosamond 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 Rosamond: frequently asked questions
Who is the best septic service company in Rosamond?
By CR Score, the highest-ranked septic service company in Rosamond, CA is M8 Plumbing Inc. with a CR Score of 60/100. It has 5.0★ from 34 Google reviews. It is open 24/7. Roto-Rooter Plumbing & Water Cleanup (#2) and Big Flow Drain Company - Plumbing & Sewer (#3) follow. We ranked 15 septic service companies on ten factors, last updated November 3, 2026.
How many septic service companies are there in Rosamond?
ContractorsRanked ranks 15 septic service companies serving Rosamond, CA. Counts are as of November 2026.
Which septic service companies in Rosamond are open 24/7?
10 ranked septic service companies in Rosamond post 24/7 hours. The highest-ranked are M8 Plumbing Inc. (#1), Roto-Rooter Plumbing & Water Cleanup (#2) and Big Flow Drain Company - Plumbing & Sewer (#3). Hours come from each business's Google listing as of November 2026, so call to confirm.
Which septic service companies in Rosamond work on weekends?
13 of 15 ranked septic service companies post Saturday hours and 11 post Sunday hours. The highest-ranked open Saturdays are M8 Plumbing Inc. (#1), Roto-Rooter Plumbing & Water Cleanup (#2) and Big Flow Drain Company - Plumbing & Sewer (#3). Posted hours are office hours; crews may book weekend jobs separately.
What Google rating do Rosamond septic service companies have?
The median Google rating among 15 rated septic service companies in Rosamond is 4.7★, with a median of 17 reviews. Roto-Rooter Plumbing & Water Cleanup has the most, 625 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 Rosamond count in this ranking?
Yes, if they are within 25 mi of the Rosamond 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 Rosamond
- November 2026: CR Scores recalculated for 15 septic service companies serving Rosamond.
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