60/100CR Score
Ranked #1 because of its Google rating and trade focus: 4.7★ from 89 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 Denison, TX (2026)
15 septic service companies ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
The short answer
- 1
Best overall in Denison: D & D Septic Tank Service, CR Score 60/100; 4.7★ from 89 Google reviews; open 24/7.
- 2
Best for emergencies (open 24/7): Underwood Plumbing and Septic, posts 24/7 hours; ranked #2 of 15.
- 3
Most-reviewed: Underwood Plumbing and Septic, 916 Google reviews at 4.7★, the most of 15 ranked; ranked #3.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
15 Denison septic service companies are ranked here by CR Score, from ten published factors. 4 are open 24/7, 7 open Saturdays and 3 open Sundays, based on posted hours. The median Google rating is 4.7★ across 15 rated businesses.
Top 10 septic service companies in Denison at a glance
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | D & D Septic Tank Service | 60 | 4.7★ (89) | Durant, 5 mi away | 24/7 | Overall |
| 2 | Underwood Plumbing and Septic | 58 | 4.9★ (114) | Sherman, 9 mi away | 24/7 | Emergencies |
| 3 | Underwood Plumbing and Septic | 57 | 4.7★ (916) | Bonham, 23 mi away | 24/7 | Most reviews |
| 4 | Slaughter Septic | 55 | 5.0★ (74) | Sherman, 13 mi away | — | — |
| 5 | Standard Construction and Environmental | 54 | 4.7★ (16) | Ardmore, 21 mi away | 24/7 | — |
| 6 | Advantage Septic Solutions | 53 | 4.3★ (27) | Sherman, 14 mi away | Sat | — |
| 7 | Turpin Septic Service | 52 | 4.9★ (67) | Bonham, 23 mi away | — | — |
| 8 | Jaresh Backhoe Inc | 52 | 4.5★ (66) | Sherman, 18 mi away | — | — |
| 9 | Slaughter Septic Pumping | 52 | 4.1★ (9) | Sherman, 13 mi away | Sat | — |
| 10 | A-1 Little John, Inc. | 51 | 4.8★ (75) | Denison | — | — |
The 15 best septic service companies in Denison, ranked
Ordered by CR Score, a 0–100 score from ten published factors. Paid placement never changes the order.
Based in Sherman, 9 mi away
58/100CR ScoreRanked #2 because of its Google rating and trade focus: 4.9★ from 114 Google reviews, listed on Google as “Plumber”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Bonham, 23 mi away
57/100CR ScoreRanked #3 because of its Google rating and review volume: 4.7★ from 916 Google reviews, the most in Denison.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Sherman, 13 mi away
55/100CR ScoreRanked #4 because of its Google rating and trade focus: 5.0★ from 74 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Ardmore, 21 mi away
54/100CR ScoreRanked #5 because of its Google rating and trade focus: 4.7★ 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 Sherman, 14 mi away
53/100CR ScoreRanked #6 because of its Google rating and trade focus: 4.3★ from 27 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Bonham, 23 mi away
52/100CR ScoreRanked #7 because of its Google rating and trade focus: 4.9★ from 67 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Sherman, 18 mi away
52/100CR ScoreRanked #8 because of its Google rating and trade focus: 4.5★ from 66 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Sherman, 13 mi away
52/100CR ScoreRanked #9 because of its Google rating and trade focus: 4.1★ 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 Denison
51/100CR ScoreRanked #10 because of its Google rating and review volume: 4.8★ from 75 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
#11 CFM Septic LLC
Based in Gainesville, 16 mi away
51/100CR ScoreRanked #11 because of its Google rating and trade focus: 5.0★ from 8 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Sherman, 24 mi away
50/100CR ScoreRanked #12 because of its Google rating and trade focus: 4.7★ from 47 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Sherman, 8 mi away
50/100CR ScoreRanked #13 because of its Google rating and trade focus: 3.9★ 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 Bonham, 24 mi away
50/100CR ScoreRanked #14 because of its Google rating and trade focus: 4.0★ from 47 Google reviews, listed on Google as “Septic system service”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
Based in Bonham, 24 mi away
49/100CR ScoreRanked #15 because of its Google rating and trade focus: 4.6★ from 18 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Also serving Denison
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 |
|---|---|---|
| AAA Septic Service | 10 mi | |
| Advantage Septic Repair & Cleaning | 5.0★ (1) | In Denison |
| Red River Septic Services | 9 mi | |
| Supreme Septic L.L.C. | 5.0★ (2) | 19 mi |
| Underwood Inc | 5.0★ (1) | 23 mi |
How we ranked Denison septic service companies
We scored 15 Denison 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 Denison 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 Denison: frequently asked questions
Who is the best septic service company in Denison?
By CR Score, the highest-ranked septic service company in Denison, TX is D & D Septic Tank Service with a CR Score of 60/100. It has 4.7★ from 89 Google reviews. It is open 24/7. Underwood Plumbing and Septic (#2) and Underwood Plumbing and Septic (#3) follow. We ranked 15 septic service companies on ten factors, last updated November 3, 2026.
How many septic service companies are there in Denison?
ContractorsRanked ranks 15 septic service companies serving Denison, TX. 1 of them is based in Denison; 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 Denison are open 24/7?
4 ranked septic service companies in Denison post 24/7 hours. The highest-ranked are D & D Septic Tank Service (#1), Underwood Plumbing and Septic (#2) and Underwood Plumbing and Septic (#3). Hours come from each business's Google listing as of November 2026, so call to confirm.
Which septic service companies in Denison work on weekends?
7 of 15 ranked septic service companies post Saturday hours and 3 post Sunday hours. The highest-ranked open Saturdays are D & D Septic Tank Service (#1), Underwood Plumbing and Septic (#2) and Underwood Plumbing and Septic (#3). Posted hours are office hours; crews may book weekend jobs separately.
What Google rating do Denison septic service companies have?
The median Google rating among 15 rated septic service companies in Denison is 4.7★, with a median of 47 reviews. Underwood Plumbing and Septic has the most, 916 reviews, and ranks #3. 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 Denison count in this ranking?
Yes, if they are within 25 mi of the Denison 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 Denison
- November 2026: CR Scores recalculated for 15 septic service companies serving Denison.
- November 2026: 1 duplicate listing merged.
More septic service companies and Denison pages
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