62/100CR 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 Lancaster, CA (2026)
21 septic service companies ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
The short answer
- 1
Best overall in Lancaster: M8 Plumbing Inc., CR Score 62/100; 5.0★ from 34 Google reviews; open 24/7.
- 2
Best for emergencies (open 24/7): Valley Sanitation LLC, posts 24/7 hours; ranked #2 of 21.
- 8
Most-reviewed: Roto-Rooter Plumbing & Water Cleanup, 625 Google reviews at 4.4★, the most of 21 ranked; ranked #8.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
21 Lancaster septic service companies are ranked here by CR Score, from ten published factors. 15 are open 24/7, 18 open Saturdays and 16 open Sundays, based on posted hours. The median Google rating is 4.7★ across 21 rated businesses.
Top 10 septic service companies in Lancaster at a glance
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | M8 Plumbing Inc. | 62 | 5.0★ (34) | Lancaster | 24/7 | Overall |
| 2 | Valley Sanitation LLC | 60 | 4.7★ (26) | Lancaster | 24/7 | Emergencies |
| 3 | Roto-Rooter Plumbing & Water Cleanup | 59 | 4.7★ (352) | Lancaster | 24/7 | — |
| 4 | Big Flow Drain Company - Plumbing & Sewer | 58 | 5.0★ (43) | Lancaster | 24/7 | — |
| 5 | Mr. Rooter Plumbing of Palmdale | 58 | 4.7★ (193) | Lancaster | 24/7 | — |
| 6 | Blue Muscle Plumbing And Rooter Service | 58 | 5.0★ (295) | Lancaster | Sat · Evenings | — |
| 7 | Septic Works | 57 | 4.8★ (12) | Lancaster | Sat · Sun | — |
| 8 | Roto-Rooter Plumbing & Water Cleanup | 57 | 4.4★ (625) | California City, 9 mi away | 24/7 | Most reviews |
| 9 | JT Sanitation Septic and Sewer Co. | 55 | 4.5★ (13) | Lancaster | Sat | — |
| 10 | Sewer Inspection Pros | 55 | 5.0★ (131) | Santa Clarita, 25 mi away | 24/7 | — |
The 21 best septic service companies in Lancaster, ranked
Ordered by CR Score, a 0–100 score from ten published factors. Paid placement never changes the order.
Based in Lancaster
60/100CR ScoreRanked #2 because of its Google rating and trade focus: 4.7★ from 26 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Lancaster
59/100CR ScoreRanked #3 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
58/100CR ScoreRanked #4 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
58/100CR ScoreRanked #5 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.
Based in Lancaster
58/100CR ScoreRanked #6 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.
#7 Septic Works
Based in Lancaster
57/100CR 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 California City, 9 mi away
57/100CR ScoreRanked #8 because of its Google rating and review volume: 4.4★ from 625 Google reviews, the most in Lancaster.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Lancaster
55/100CR ScoreRanked #9 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 Santa Clarita, 25 mi away
55/100CR ScoreRanked #10 because of its Google rating and review volume: 5.0★ from 131 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Lancaster
55/100CR ScoreRanked #11 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.
Based in Los Angeles, 21 mi away
54/100CR ScoreRanked #12 because of its Google rating and trade focus: 5.0★ from 13 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
#13 Jim's Sanitation
Based in Palmdale, 8 mi away
54/100CR ScoreRanked #13 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, 4 mi away
53/100CR ScoreRanked #14 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 Lancaster
52/100CR ScoreRanked #15 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 Irvine, 5 mi away
52/100CR ScoreRanked #16 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 Valencia, 21 mi away
52/100CR ScoreRanked #17 because of its Google rating and trade focus: 3.7★ from 9 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Lancaster
52/100CR ScoreRanked #18 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, 7 mi away
48/100CR ScoreRanked #19 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.
Based in Santa Clarita, 24 mi away
47/100CR ScoreRanked #20 because of its Google rating and review volume: 4.7★ from 68 Google reviews.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
Based in Santa Clarita, 24 mi away
43/100CR ScoreRanked #21 because of its Google rating and review volume: 2.9★ from 105 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Also serving Lancaster
5 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 In Sanitation | Grease Trap Pumping | Septic Tank Pumping | 5.0★ (2) | In Lancaster |
| AllCalJet | 5.0★ (1) | In Lancaster |
| Downs Pumping Co | 5.0★ (1) | 19 mi |
| Ferguson Plumbing Supply | 4.3★ (24) | In Lancaster |
| J T Sanitation | 20 mi |
How we ranked Lancaster septic service companies
We scored 21 Lancaster 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 2, 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 Lancaster 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 Lancaster: frequently asked questions
Who is the best septic service company in Lancaster?
By CR Score, the highest-ranked septic service company in Lancaster, CA is M8 Plumbing Inc. with a CR Score of 62/100. It has 5.0★ from 34 Google reviews. It is open 24/7. Valley Sanitation LLC (#2) and Roto-Rooter Plumbing & Water Cleanup (#3) follow. We ranked 21 septic service companies on ten factors, last updated November 2, 2026.
How many septic service companies are there in Lancaster?
ContractorsRanked ranks 21 septic service companies serving Lancaster, CA. 11 of them are based in Lancaster; the rest serve it from nearby towns. Another 5 within 25 mi are listed but not ranked yet. Counts are as of November 2026.
Which septic service companies in Lancaster are open 24/7?
15 ranked septic service companies in Lancaster post 24/7 hours. The highest-ranked are M8 Plumbing Inc. (#1), Valley Sanitation LLC (#2) and Roto-Rooter Plumbing & Water Cleanup (#3). Hours come from each business's Google listing as of November 2026, so call to confirm.
Which septic service companies in Lancaster work on weekends?
18 of 21 ranked septic service companies post Saturday hours and 16 post Sunday hours. The highest-ranked open Saturdays are M8 Plumbing Inc. (#1), Valley Sanitation LLC (#2) and Roto-Rooter Plumbing & Water Cleanup (#3). Posted hours are office hours; crews may book weekend jobs separately.
What Google rating do Lancaster septic service companies have?
The median Google rating among 21 rated septic service companies in Lancaster is 4.7★, with a median of 20 reviews. Roto-Rooter Plumbing & Water Cleanup has the most, 625 reviews, and ranks #8. 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 Lancaster count in this ranking?
Yes, if they are within 25 mi of the Lancaster 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 Lancaster
- November 2026: CR Scores recalculated for 21 septic service companies serving Lancaster.
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