67/100CR Score
Ranked #1 because of its Google rating and review volume: 5.0★ from 167 Google reviews, the most in California.
Based on 8 of 10 factors; credentials and recency not yet collected.
Best Septic Service Companies in California, MD (2026)
10 septic service companies ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
The short answer
- 1
Best overall in California: Cullison Excavating and Septic, CR Score 67/100; 5.0★ from 167 Google reviews; open 24/7.
- 2
Best for emergencies (open 24/7): Innovative Septic, posts 24/7 hours; ranked #2 of 10.
- 2
Most-reviewed: Innovative Septic, 98 Google reviews at 4.9★, the most of 10 ranked after Cullison Excavating and Septic; ranked #2.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
10 California septic service companies are ranked here by CR Score, from ten published factors. 2 are open 24/7, 6 open Saturdays and 4 open Sundays, based on posted hours. The median Google rating is 4.8★ across 10 rated businesses.
Top 10 septic service companies in California at a glance
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Cullison Excavating and Septic | 67 | 5.0★ (167) | Lexington Park, 5 mi away | 24/7 | Overall |
| 2 | Innovative Septic | 62 | 4.9★ (98) | Waldorf, 19 mi away | 24/7 | Emergencies, Most reviews |
| 3 | Concepts in building septic installs and pumps | 61 | 4.7★ (22) | California | Sat · Sun | — |
| 4 | SOMD Septic | 61 | 4.8★ (33) | California | Sat | — |
| 5 | C & C Plumbing & Septic Inc | 56 | 4.7★ (66) | California | — | — |
| 6 | Jimmy's Septic LLC | 56 | 4.9★ (48) | Rosaryville, 25 mi away | — | — |
| 7 | Carter's Septic Tank Services | 56 | 5.0★ (7) | California | — | — |
| 8 | Still Water Septic Services | 53 | 1.0★ (4) | Lexington Park, 6 mi away | — | — |
| 9 | D Barnes Excavating, LLC | 53 | 5.0★ (13) | California | Sat | — |
| 10 | J Browne Excavating, LLC | 52 | 4.1★ (18) | Lexington Park, 5 mi away | Sat · Sun | — |
The 10 best septic service companies in California, ranked
Ordered by CR Score, a 0–100 score from ten published factors. Paid placement never changes the order.
Based in Waldorf, 19 mi away
62/100CR ScoreRanked #2 because of its Google rating and trade focus: 4.9★ from 98 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in California
61/100CR ScoreRanked #3 because of its Google rating and trade focus: 4.7★ from 22 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
#4 SOMD Septic
Based in California
61/100CR ScoreRanked #4 because of its Google rating and trade focus: 4.8★ from 33 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in California
56/100CR ScoreRanked #5 because of its Google rating and review volume: 4.7★ from 66 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Rosaryville, 25 mi away
56/100CR ScoreRanked #6 because of its Google rating and trade focus: 4.9★ from 48 Google reviews, listed on Google as “Septic system service”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
Based in California
56/100CR ScoreRanked #7 because of its Google rating and trade focus: 5.0★ from 7 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Lexington Park, 6 mi away
53/100CR ScoreRanked #8 because of its Google rating and trade focus: 1.0★ from 4 Google reviews, listed on Google as “Septic system service”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
Based in California
53/100CR ScoreRanked #9 because of its Google rating and review volume: 5.0★ from 13 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Lexington Park, 5 mi away
52/100CR ScoreRanked #10 because of its Google rating and review volume: 4.1★ from 18 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Also serving California
1 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 | Distance |
|---|---|
| Harris Excavating Solutions, L.L.C. | In California |
How we ranked California septic service companies
We scored 10 California 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 California 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 California: frequently asked questions
Who is the best septic service company in California?
By CR Score, the highest-ranked septic service company in California, MD is Cullison Excavating and Septic with a CR Score of 67/100. It has 5.0★ from 167 Google reviews. It is open 24/7. Innovative Septic (#2) and Concepts in building septic installs and pumps (#3) follow. We ranked 10 septic service companies on ten factors, last updated November 3, 2026.
How many septic service companies are there in California?
ContractorsRanked ranks 10 septic service companies serving California, MD. 5 of them are based in California; the rest serve it from nearby towns. Another 1 within 25 mi are listed but not ranked yet. Counts are as of November 2026.
Which septic service companies in California are open 24/7?
2 ranked septic service companies in California post 24/7 hours. The highest-ranked are Cullison Excavating and Septic (#1) and Innovative Septic (#2). Hours come from each business's Google listing as of November 2026, so call to confirm.
Which septic service companies in California work on weekends?
6 of 10 ranked septic service companies post Saturday hours and 4 post Sunday hours. The highest-ranked open Saturdays are Cullison Excavating and Septic (#1), Innovative Septic (#2) and Concepts in building septic installs and pumps (#3). Posted hours are office hours; crews may book weekend jobs separately.
What Google rating do California septic service companies have?
The median Google rating among 10 rated septic service companies in California is 4.8★, with a median of 28 reviews. Cullison Excavating and Septic has the most, 167 reviews, and ranks #1. 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 California count in this ranking?
Yes, if they are within 25 mi of the California 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 California
- November 2026: CR Scores recalculated for 10 septic service companies serving California.
More septic service companies and California pages
Septic service companies near California
- Septic service companies in Lexington Park, MD9 ranked
- Septic service companies in Chesapeake Ranch Estates, MD11 ranked
- Septic service companies in Cambridge, MD12 ranked
- Septic service companies in St. Charles, MD35 ranked
- Septic service companies in Saint Charles, MD36 ranked
- Septic service companies in Waldorf, MD37 ranked
- Septic service companies in Bennsville, MD37 ranked
- Septic service companies in Rosaryville, MD49 ranked
- Septic service companies in Accokeek, MD38 ranked
- Septic service companies in Clinton, MD48 ranked
Other trades in California
- Roofers in California92 ranked
- Plumbers in California16 ranked
- Electricians in California19 ranked
- HVAC contractors in California26 ranked
- General contractors in California31 ranked
- Painters in California12 ranked
- Landscapers in California33 ranked
- Handymen in California13 ranked
- Kitchen remodelers in California23 ranked
- Bathroom remodelers in California24 ranked
- Flooring contractors in California15 ranked
- Concrete contractors in California9 ranked
- Fence contractors in California5 ranked
- Deck builders in California13 ranked
- Siding contractors in California47 ranked
- Window installers in California40 ranked
- Gutter installers in California8 ranked
- Solar installers in California14 ranked
- Garage door repair companies in California6 ranked
- Foundation repair companies in California6 ranked
- Tree services in California18 ranked
- Masonry contractors in California9 ranked
- Water damage restoration companies in California42 ranked
- Home builders in California68 ranked
- Demolition contractors in California6 ranked
- Pressure washing companies in California7 ranked
- Pest control companies in California5 ranked
- Paving contractors in California7 ranked
- Auto glass repair shops in California12 ranked
- Excavating contractors in California20 ranked
- Pool builders in California25 ranked
- All contractors in California