59/100CR Score
Ranked #1 because of its Google rating and review volume: 4.8★ from 2,955 Google reviews, the most in Sedro-Woolley.
Based on 8 of 10 factors; credentials and recency not yet collected.
Best Septic Service Companies in Sedro-Woolley, WA (2026)
33 septic service companies ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
The short answer
- 1
Best overall in Sedro-Woolley: CPI Plumbing & Heating, CR Score 59/100; 4.8★ from 2,955 Google reviews; open 24/7.
- 5
Best for emergencies (open 24/7): CPI Plumbing, Heating & Cooling, posts 24/7 hours; ranked #5 of 33.
- 5
Most-reviewed: CPI Plumbing, Heating & Cooling, 784 Google reviews at 4.9★, the most of 33 ranked after CPI Plumbing & Heating; ranked #5.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
33 Sedro-Woolley septic service companies are ranked here by CR Score, from ten published factors. 5 are open 24/7, 14 open Saturdays and 8 open Sundays, based on posted hours. The median Google rating is 4.7★ across 33 rated businesses.
Top 10 septic service companies in Sedro-Woolley at a glance
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | CPI Plumbing & Heating | 59 | 4.8★ (2,955) | Mount Vernon, 8 mi away | 24/7 | Overall |
| 2 | Advanced Septic Systems Inc | 55 | 5.0★ (5) | Sedro-Woolley | — | — |
| 3 | Klein Septic Service | 55 | 4.7★ (73) | Arlington, 20 mi away | Sat · Sun · Evenings | — |
| 4 | All Around Septic LLC | 54 | 4.8★ (20) | Bellingham, 15 mi away | Sat · Sun · Evenings | — |
| 5 | CPI Plumbing, Heating & Cooling | 54 | 4.9★ (784) | Oak Harbor, 24 mi away | 24/7 | Emergencies, Most reviews |
| 6 | Berg Vault | 54 | 5.0★ (32) | Mount Vernon, 8 mi away | — | — |
| 7 | Brooks Construction & Septic | 54 | 4.8★ (19) | Bellingham, 24 mi away | 24/7 | — |
| 8 | Dirty Deeds Septic | 54 | 4.9★ (312) | Oak Harbor, 24 mi away | — | — |
| 9 | Septic Solutions LLC Mount Vernon | 53 | 4.5★ (8) | Mount Vernon, 7 mi away | Sat · Evenings | — |
| 10 | Gateway Septic Services | 53 | 4.2★ (10) | Sedro-Woolley | — | — |
The 33 best septic service companies in Sedro-Woolley, ranked
Ordered by CR Score, a 0–100 score from ten published factors. Paid placement never changes the order.
Based in Sedro-Woolley
55/100CR ScoreRanked #2 because of its Google rating and trade focus: 5.0★ from 5 Google reviews, listed on Google as “Septic system service”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
Based in Arlington, 20 mi away
55/100CR ScoreRanked #3 because of its Google rating and trade focus: 4.7★ from 73 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Bellingham, 15 mi away
54/100CR ScoreRanked #4 because of its Google rating and trade focus: 4.8★ from 20 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Oak Harbor, 24 mi away
54/100CR ScoreRanked #5 because of its Google rating and review volume: 4.9★ from 784 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
#6 Berg Vault
Based in Mount Vernon, 8 mi away
54/100CR ScoreRanked #6 because of its Google rating and trade focus: 5.0★ from 32 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Bellingham, 24 mi away
54/100CR ScoreRanked #7 because of its Google rating and trade focus: 4.8★ from 19 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Oak Harbor, 24 mi away
54/100CR ScoreRanked #8 because of its Google rating and trade focus: 4.9★ from 312 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Mount Vernon, 7 mi away
53/100CR ScoreRanked #9 because of its Google rating and trade focus: 4.5★ 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 Sedro-Woolley
53/100CR ScoreRanked #10 because of its Google rating and trade focus: 4.2★ from 10 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
#11 Prime Septic LLC
Based in Arlington, 25 mi away
53/100CR ScoreRanked #11 because of its Google rating and trade focus: 4.9★ from 78 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Stanwood, 19 mi away
52/100CR ScoreRanked #12 because of its Google rating and trade focus: 4.7★ from 39 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Mount Vernon, 6 mi away
52/100CR ScoreRanked #13 because of its Google rating and trade focus: 2.9★ from 9 Google reviews, listed on Google as “Septic system service”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
Based in Arlington, 22 mi away
52/100CR ScoreRanked #14 because of its Google rating and trade focus: 5.0★ from 23 Google reviews, listed on Google as “Septic system service”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
Based in Arlington, 24 mi away
52/100CR ScoreRanked #15 because of its Google rating and trade focus: 4.9★ from 36 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Arlington, 24 mi away
52/100CR ScoreRanked #16 because of its Google rating and trade focus: 3.7★ from 62 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Burlington, 10 mi away
51/100CR ScoreRanked #17 because of its Google rating and trade focus: 5.0★ from 80 Google reviews, listed on Google as “Plumber”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Bellingham, 23 mi away
51/100CR ScoreRanked #18 because of its Google rating and trade focus: 4.6★ from 24 Google reviews, listed on Google as “Septic system service”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
Based in Burlington, 13 mi away
51/100CR ScoreRanked #19 because of its Google rating and trade focus: 4.7★ from 14 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Mount Vernon, 3 mi away
51/100CR ScoreRanked #20 because of its Google rating and trade focus: 3.7★ from 3 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Bellingham, 25 mi away
51/100CR ScoreRanked #21 because of its Google rating and trade focus: 4.6★ from 34 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Anacortes, 23 mi away
50/100CR ScoreRanked #22 because of its Google rating and trade focus: 4.8★ 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 Camano, 20 mi away
50/100CR ScoreRanked #23 because of its Google rating and trade focus: 3.3★ from 19 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Arlington, 23 mi away
50/100CR ScoreRanked #24 because of its Google rating and trade focus: 4.5★ from 80 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Anacortes, 17 mi away
50/100CR ScoreRanked #25 because of its Google rating and trade focus: 4.2★ from 5 Google reviews, listed on Google as “Septic system service”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
All 33 septic service companies
#1 to #25 are shown in full above. Here are #26 to #33, in CR Score order; each links to its profile.
| Rank | Business | CR Score | Google rating | Distance |
|---|---|---|---|---|
| 26 | United Site Services | 50 | 2.9★ (11) | 8 mi |
| 27 | Rainbow Septic | 49 | 5.0★ (8) | 17 mi |
| 28 | RW Kramer Enterprises, Inc. | 48 | 3.9★ (7) | 25 mi |
| 29 | Alpine Environmental Services | 48 | 4.7★ (11) | 23 mi |
| 30 | Metcalfe Septic Services | 48 | 4.1★ (27) | 23 mi |
| 31 | Lil John Sanitary Services, Inc | 47 | 4.7★ (14) | 24 mi |
| 32 | Envirotek Septic Solutions | 47 | 3.5★ (27) | 23 mi |
| 33 | McFarlane Construction | 43 | 5.0★ (20) | 24 mi |
Also serving Sedro-Woolley
9 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 |
|---|---|---|
| A1 Septic Solution | 6 mi | |
| C Johnson Construction, Inc. | 5.0★ (1) | 22 mi |
| EarthBuster | 23 mi | |
| ELVROM CONSTRUCTION & EXCAVATING LLC | 5.0★ (2) | 19 mi |
| Evergreen Sanitation | 8 mi | |
| Metcalfe Septic Services | 1.0★ (1) | 24 mi |
| Polymer Land Consultants | 3.5★ (2) | 22 mi |
| RooterWorx Plumbing & Construction | 24 mi | |
| Septic System Design | 18 mi |
How we ranked Sedro-Woolley septic service companies
We scored 33 Sedro-Woolley 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 Sedro-Woolley 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 Sedro-Woolley: frequently asked questions
Who is the best septic service company in Sedro-Woolley?
By CR Score, the highest-ranked septic service company in Sedro-Woolley, WA is CPI Plumbing & Heating with a CR Score of 59/100. It has 4.8★ from 2,955 Google reviews. It is open 24/7. Advanced Septic Systems Inc (#2) and Klein Septic Service (#3) follow. We ranked 33 septic service companies on ten factors, last updated November 3, 2026.
How many septic service companies are there in Sedro-Woolley?
ContractorsRanked ranks 33 septic service companies serving Sedro-Woolley, WA. 2 of them are based in Sedro-Woolley; the rest serve it from nearby towns. Another 9 within 25 mi are listed but not ranked yet. Counts are as of November 2026.
Which septic service companies in Sedro-Woolley are open 24/7?
5 ranked septic service companies in Sedro-Woolley post 24/7 hours. The highest-ranked are CPI Plumbing & Heating (#1), CPI Plumbing, Heating & Cooling (#5) and Brooks Construction & Septic (#7). Hours come from each business's Google listing as of November 2026, so call to confirm.
Which septic service companies in Sedro-Woolley work on weekends?
14 of 33 ranked septic service companies post Saturday hours and 8 post Sunday hours. The highest-ranked open Saturdays are CPI Plumbing & Heating (#1), Klein Septic Service (#3) and All Around Septic LLC (#4). Posted hours are office hours; crews may book weekend jobs separately.
What Google rating do Sedro-Woolley septic service companies have?
The median Google rating among 33 rated septic service companies in Sedro-Woolley is 4.7★, with a median of 20 reviews. CPI Plumbing & Heating has the most, 2,955 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 Sedro-Woolley count in this ranking?
Yes, if they are within 25 mi of the Sedro-Woolley 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 Sedro-Woolley
- November 2026: CR Scores recalculated for 33 septic service companies serving Sedro-Woolley.
More septic service companies and Sedro-Woolley pages
Septic service companies near Sedro-Woolley
- Septic service companies in Mount Vernon, WA32 ranked
- Septic service companies in Sudden Valley, WA29 ranked
- Septic service companies in Anacortes, WA24 ranked
- Septic service companies in Bellingham, WA32 ranked
- Septic service companies in Arlington, WA78 ranked
- Septic service companies in Oak Harbor, WA31 ranked
- Septic service companies in Camano, WA60 ranked
- Septic service companies in Ferndale, WA38 ranked
- Septic service companies in Marysville, WA93 ranked
- Septic service companies in Lynden, WA51 ranked
Other trades in Sedro-Woolley
- Roofers in Sedro-Woolley220 ranked
- Plumbers in Sedro-Woolley75 ranked
- Electricians in Sedro-Woolley112 ranked
- HVAC contractors in Sedro-Woolley73 ranked
- General contractors in Sedro-Woolley170 ranked
- Painters in Sedro-Woolley28 ranked
- Landscapers in Sedro-Woolley42 ranked
- Handymen in Sedro-Woolley12 ranked
- Kitchen remodelers in Sedro-Woolley47 ranked
- Bathroom remodelers in Sedro-Woolley46 ranked
- Flooring contractors in Sedro-Woolley40 ranked
- Tile installers in Sedro-Woolley6 ranked
- Concrete contractors in Sedro-Woolley43 ranked
- Fence contractors in Sedro-Woolley34 ranked
- Deck builders in Sedro-Woolley44 ranked
- Siding contractors in Sedro-Woolley78 ranked
- Window installers in Sedro-Woolley64 ranked
- Gutter installers in Sedro-Woolley48 ranked
- Insulation contractors in Sedro-Woolley31 ranked
- Solar installers in Sedro-Woolley34 ranked
- Garage door repair companies in Sedro-Woolley8 ranked
- Foundation repair companies in Sedro-Woolley19 ranked
- Tree services in Sedro-Woolley50 ranked
- Masonry contractors in Sedro-Woolley19 ranked
- Water damage restoration companies in Sedro-Woolley100 ranked
- Home builders in Sedro-Woolley131 ranked
- Demolition contractors in Sedro-Woolley10 ranked
- Window cleaners in Sedro-Woolley8 ranked
- Pressure washing companies in Sedro-Woolley14 ranked
- Pest control companies in Sedro-Woolley17 ranked
- Paving contractors in Sedro-Woolley18 ranked
- Auto glass repair shops in Sedro-Woolley24 ranked
- Excavating contractors in Sedro-Woolley52 ranked
- Pool builders in Sedro-Woolley12 ranked
- All contractors in Sedro-Woolley