62/100CR Score
Ranked #1 because of its Google rating and review volume: 4.9★ from 1,150 Google reviews, the most in Kennewick.
Based on 8 of 10 factors; credentials and recency not yet collected.
Best Septic Service Companies in Kennewick, WA (2026)
20 septic service companies ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
The short answer
- 1
Best overall in Kennewick: Express 24 Hr Plumbing & Drain, LLC, CR Score 62/100; 4.9★ from 1,150 Google reviews; open 24/7.
- 5
Best for emergencies (open 24/7): Mr. Rooter Plumbing of Tri-Cities, posts 24/7 hours; ranked #5 of 20.
- 5
Most-reviewed: Mr. Rooter Plumbing of Tri-Cities, 744 Google reviews at 4.7★, the most of 20 ranked after Express 24 Hr Plumbing & Drain, LLC; ranked #5.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
20 Kennewick septic service companies are ranked here by CR Score, from ten published factors. 6 are open 24/7, 11 open Saturdays and 9 open Sundays, based on posted hours. The median Google rating is 4.8★ across 20 rated businesses.
Top 10 septic service companies in Kennewick at a glance
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Express 24 Hr Plumbing & Drain, LLC | 62 | 4.9★ (1,150) | Kennewick | 24/7 | Overall |
| 2 | Bison Septic | 62 | 4.8★ (87) | Kennewick | Sat · Sun | — |
| 3 | Greg's Septic Service | 60 | 4.8★ (44) | Kennewick | Sat · Sun | — |
| 4 | Ray's Twilight Septic Service | 60 | 5.0★ (593) | Pasco, 11 mi away | — | — |
| 5 | Mr. Rooter Plumbing of Tri-Cities | 59 | 4.7★ (744) | Pasco, 2 mi away | 24/7 | Emergencies, Most reviews |
| 6 | Roto Rooter Service - Walla Walla | 58 | 4.9★ (144) | Kennewick | 24/7 | — |
| 7 | Reliable Rooter | 56 | 4.6★ (161) | Pasco, 3 mi away | 24/7 | — |
| 8 | Ace portable toilets & Septic Tank Pumping | 55 | 4.8★ (27) | Pasco, 3 mi away | — | — |
| 9 | Doctor Dan Septic Specialist | 54 | 5.0★ (4) | Richland, 6 mi away | — | — |
| 10 | Sewer Pros | 53 | 5.0★ (10) | Kennewick | Sat | — |
The 20 best septic service companies in Kennewick, ranked
Ordered by CR Score, a 0–100 score from ten published factors. Paid placement never changes the order.
#2 Bison Septic
Based in Kennewick
62/100CR ScoreRanked #2 because of its Google rating and trade focus: 4.8★ from 87 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Kennewick
60/100CR ScoreRanked #3 because of its Google rating and trade focus: 4.8★ from 44 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Pasco, 11 mi away
60/100CR ScoreRanked #4 because of its Google rating and trade focus: 5.0★ from 593 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Pasco, 2 mi away
59/100CR ScoreRanked #5 because of its Google rating and review volume: 4.7★ from 744 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Kennewick
58/100CR ScoreRanked #6 because of its Google rating and review volume: 4.9★ from 144 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Pasco, 3 mi away
56/100CR ScoreRanked #7 because of its Google rating and review volume: 4.6★ from 161 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Pasco, 3 mi away
55/100CR ScoreRanked #8 because of its Google rating and trade focus: 4.8★ 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 Richland, 6 mi away
54/100CR ScoreRanked #9 because of its Google rating and trade focus: 5.0★ from 4 Google reviews, listed on Google as “Septic system service”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
#10 Sewer Pros
Based in Kennewick
53/100CR ScoreRanked #10 because of its Google rating and trade focus: 5.0★ from 10 Google reviews, listed on Google as “Plumber”.
Based on 8 of 10 factors; credentials and recency not yet collected.
#11 Warthog Septic
Based in Pasco, 2 mi away
53/100CR ScoreRanked #11 because of its Google rating and trade focus: 5.0★ from 5 Google reviews, listed on Google as “Plumber”.
Based on 8 of 10 factors; credentials and recency not yet collected.
#12 Westfall Septic
Based in Hermiston, 24 mi away
52/100CR ScoreRanked #12 because of its Google rating and trade focus: 4.8★ from 49 Google reviews, listed on Google as “Plumber”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in West Richland, 18 mi away
52/100CR ScoreRanked #13 because of its Google rating and trade focus: 4.8★ from 16 Google reviews, listed on Google as “Plumber”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Kennewick
49/100CR ScoreRanked #14 because of its Google rating and review volume: 4.3★ from 37 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Richland, 11 mi away
49/100CR ScoreRanked #15 because of its Google rating and review volume: 4.9★ from 66 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Kennewick
48/100CR ScoreRanked #16 because of its Google rating and trade focus: 4.5★ from 14 Google reviews, listed on Google as “Construction company”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Richland, 5 mi away
48/100CR ScoreRanked #17 because of its Google rating and trade focus: 4.8★ from 16 Google reviews, listed on Google as “Concrete contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
#18 Rada Inc
Based in Pasco, 4 mi away
46/100CR ScoreRanked #18 because of its Google rating and trade focus: 5.0★ from 6 Google reviews, listed on Google as “Concrete contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Richland, 24 mi away
46/100CR ScoreRanked #19 because of its Google rating and trade focus: 5.0★ from 21 Google reviews, listed on Google as “Plumber”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Pasco, 12 mi away
44/100CR ScoreRanked #20 because of its Google rating and trade focus: 5.0★ from 4 Google reviews, listed on Google as “Asphalt contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Also serving Kennewick
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 |
|---|---|---|
| Doug's Septic Services | 5.0★ (1) | 23 mi |
| Mf'n Dirty Work | 14 mi | |
| Mighty Johns Portable Toilet & Septic Service, Inc. | In Kennewick | |
| Performance Electric Service LLC | 5.0★ (2) | In Kennewick |
| Rattlesnake Fencing and Construction LLC | 5.0★ (1) | In Kennewick |
How we ranked Kennewick septic service companies
We scored 20 Kennewick 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 Kennewick 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 Kennewick: frequently asked questions
Who is the best septic service company in Kennewick?
By CR Score, the highest-ranked septic service company in Kennewick, WA is Express 24 Hr Plumbing & Drain, LLC with a CR Score of 62/100. It has 4.9★ from 1,150 Google reviews. It is open 24/7. Bison Septic (#2) and Greg's Septic Service (#3) follow. We ranked 20 septic service companies on ten factors, last updated November 3, 2026.
How many septic service companies are there in Kennewick?
ContractorsRanked ranks 20 septic service companies serving Kennewick, WA. 7 of them are based in Kennewick; 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 Kennewick are open 24/7?
6 ranked septic service companies in Kennewick post 24/7 hours. The highest-ranked are Express 24 Hr Plumbing & Drain, LLC (#1), Mr. Rooter Plumbing of Tri-Cities (#5) and Roto Rooter Service - Walla Walla (#6). Hours come from each business's Google listing as of November 2026, so call to confirm.
Which septic service companies in Kennewick work on weekends?
11 of 20 ranked septic service companies post Saturday hours and 9 post Sunday hours. The highest-ranked open Saturdays are Express 24 Hr Plumbing & Drain, LLC (#1), Bison Septic (#2) and Greg's Septic Service (#3). Posted hours are office hours; crews may book weekend jobs separately.
What Google rating do Kennewick septic service companies have?
The median Google rating among 20 rated septic service companies in Kennewick is 4.8★, with a median of 32 reviews. Express 24 Hr Plumbing & Drain, LLC has the most, 1,150 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 Kennewick count in this ranking?
Yes, if they are within 25 mi of the Kennewick 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 Kennewick
- November 2026: CR Scores recalculated for 20 septic service companies serving Kennewick.
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