62/100CR Score
Ranked #1 because of its Google rating and trade focus: 4.9★ from 100 Google reviews, listed on Google as “Septic system service”.
Best Septic Service Companies in Lake Oswego, OR (2026)
63 septic service companies ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
The short answer
- 1
Best overall in Lake Oswego: Wild Pine Plumbing, CR Score 62/100; 4.9★ from 100 Google reviews; open 24/7.
- 2
Best for emergencies (open 24/7): Lil' Stinky Septic Service, posts 24/7 hours; ranked #2 of 63.
- 17
Most-reviewed: Henco Plumbing Services, 3,061 Google reviews at 4.9★, the most of 63 ranked; ranked #17.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
63 Lake Oswego septic service companies are ranked here by CR Score, from ten published factors. 29 are open 24/7, 42 open Saturdays and 34 open Sundays, based on posted hours. The median Google rating is 4.9★ across 63 rated businesses.
Top 10 septic service companies in Lake Oswego at a glance
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Wild Pine Plumbing | 62 | 4.9★ (100) | Portland, 4 mi away | 24/7 | Overall |
| 2 | Lil' Stinky Septic Service | 61 | 4.8★ (252) | Canby, 11 mi away | 24/7 | Emergencies |
| 3 | Scout Septic, Grease & Drain | 61 | 4.9★ (341) | Portland, 15 mi away | 24/7 | — |
| 4 | Speedy Septic | 61 | 4.7★ (792) | Portland, 16 mi away | 24/7 | — |
| 5 | West Side Drain and Septic | 60 | 4.9★ (151) | Hillsboro, 13 mi away | 24/7 | — |
| 6 | Alchemy Plumbing & Drain Cleaning | 60 | 4.9★ (861) | Lake Oswego | 24/7 | — |
| 7 | Plumbing and Sewer Renewal Specialists | 59 | 5.0★ (539) | Portland, 5 mi away | Sat · Sun · Evenings | — |
| 8 | West Side Drain and Septic | 58 | 4.9★ (800) | Hillsboro, 16 mi away | 24/7 | — |
| 9 | Goodman Septic Services | 58 | 4.8★ (247) | Troutdale, 16 mi away | Sat · Sun · Evenings | — |
| 10 | West Side Drain and Septic | 58 | 5.0★ (81) | Tigard, 5 mi away | 24/7 | — |
The 63 best septic service companies in Lake Oswego, ranked
Ordered by CR Score, a 0–100 score from ten published factors. Paid placement never changes the order.
Scores below: based on 8 of 10 factors; credentials and recency not yet collected. Hatched segments mark factors we don't have yet.
Based in Canby, 11 mi away
61/100CR ScoreRanked #2 because of its Google rating and trade focus: 4.8★ from 252 Google reviews, listed on Google as “Septic system service”.
Based in Portland, 15 mi away
61/100CR ScoreRanked #3 because of its Google rating and trade focus: 4.9★ from 341 Google reviews, listed on Google as “Septic system service”.
Based in Portland, 16 mi away
61/100CR ScoreRanked #4 because of its Google rating and trade focus: 4.7★ from 792 Google reviews, listed on Google as “Septic system service”.
Based in Hillsboro, 13 mi away
60/100CR ScoreRanked #5 because of its Google rating and trade focus: 4.9★ from 151 Google reviews, listed on Google as “Septic system service”.
Based in Lake Oswego
60/100CR ScoreRanked #6 because of its Google rating and review volume: 4.9★ from 861 Google reviews.
Based in Portland, 5 mi away
59/100CR ScoreRanked #7 because of its Google rating and review volume: 5.0★ from 539 Google reviews.
Based in Hillsboro, 16 mi away
58/100CR ScoreRanked #8 because of its Google rating and review volume: 4.9★ from 800 Google reviews.
Based in Troutdale, 16 mi away
58/100CR ScoreRanked #9 because of its Google rating and trade focus: 4.8★ from 247 Google reviews, listed on Google as “Septic system service”.
Based in Tigard, 5 mi away
58/100CR ScoreRanked #10 because of its Google rating and trade focus: 5.0★ from 81 Google reviews, listed on Google as “Plumber”.
#11 Pinkies Septic
Based in Oregon City, 7 mi away
58/100CR ScoreRanked #11 because of its Google rating and trade focus: 5.0★ from 11 Google reviews, listed on Google as “Septic system service”.
Based in Oregon City, 11 mi away
57/100CR ScoreRanked #12 because of its Google rating and trade focus: 5.0★ from 42 Google reviews, listed on Google as “Septic system service”.
Based in Salem, 15 mi away
57/100CR ScoreRanked #13 because of its Google rating and trade focus: 4.9★ from 37 Google reviews, listed on Google as “Septic system service”.
Based in Portland, 16 mi away
57/100CR ScoreRanked #14 because of its Google rating and trade focus: 4.9★ from 32 Google reviews, listed on Google as “Septic system service”.
Based in Portland, 3 mi away
56/100CR ScoreRanked #15 because of its Google rating and trade focus: 4.9★ from 32 Google reviews, listed on Google as “Excavating contractor”.
Based in Portland, 14 mi away
56/100CR ScoreRanked #16 because of its Google rating and trade focus: 4.6★ from 22 Google reviews, listed on Google as “Septic system service”.
Based in Ridgefield, 24 mi away
56/100CR ScoreRanked #17 because of its Google rating and review volume: 4.9★ from 3,061 Google reviews, the most in Lake Oswego.
Based in Hillsboro, 20 mi away
56/100CR ScoreRanked #18 because of its Google rating and trade focus: 5.0★ from 29 Google reviews, listed on Google as “Septic system service”.
Based in Portland, 23 mi away
56/100CR ScoreRanked #19 because of its Google rating and trade focus: 5.0★ from 81 Google reviews, listed on Google as “Septic system service”.
Based in Vancouver, 17 mi away
55/100CR ScoreRanked #20 because of its Google rating and trade focus: 5.0★ from 74 Google reviews, listed on Google as “Septic system service”.
#21 Proline Plumbing
Based in Portland, 5 mi away
55/100CR ScoreRanked #21 because of its Google rating and review volume: 4.7★ from 178 Google reviews.
Based in Vancouver, 17 mi away
55/100CR ScoreRanked #22 because of its Google rating and review volume: 4.5★ from 534 Google reviews.
Based in Cornelius, 20 mi away
55/100CR ScoreRanked #23 because of its Google rating and trade focus: 5.0★ from 146 Google reviews, listed on Google as “Plumber”.
Based in Tigard, 7 mi away
55/100CR ScoreRanked #24 because of its Google rating and review volume: 5.0★ from 403 Google reviews.
Based in Camas, 17 mi away
55/100CR ScoreRanked #25 because of its Google rating and trade focus: 4.8★ from 135 Google reviews, listed on Google as “Plumber”.
Septic service companies ranked #26 to #50
#1 to #25 are shown in full above. Here are #26 to #50, in CR Score order; each links to its profile. We publish the top 50 of 63 ranked septic service companies here; the rest are on their profiles.
Also serving Lake Oswego
20 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 |
|---|---|---|
| A Advanced Pumping | 5.0★ (1) | 12 mi |
| Ace Septic & Excavating Inc | 5.0★ (2) | 21 mi |
| CAC Excavation Inc | 14 mi | |
| D&F Drains, Sewers and More | 5.0★ (2) | 15 mi |
| Fuhriman Septic Design & Consulting | 3 mi | |
| HorizonsNW Excavating & Septic | 5.0★ (2) | 24 mi |
| Jerry's Septic | 14 mi | |
| MB Enterprises, Excavation & Sewer LLC | 5.0★ (2) | 11 mi |
| MRP Services / Metro Rooter USA Plumber Portland | 11 mi | |
| Plumbing Systems Solutions, Inc | 15 mi | |
| Portland Septic Pros | 9 mi | |
| Reece Johnson Paving & Excavation | 5.0★ (2) | 9 mi |
| River City Environmental Inc | 5.0★ (1) | 5 mi |
| River City Plumbing | 11 mi | |
| Roto Pro | 16 mi | |
| Septic Services in Portland | 7 mi | |
| Sewer & Drain Cleaning & Licensed Journeyman Plumber Portland Area Best Rates in Town | 5 mi | |
| United Rentals - Reliable Onsite Services | 5.0★ (1) | 11 mi |
| VeggieScout Oil LLC - Clackamas | 6 mi | |
| VeggieScout Oil LLC - Gresham | 19 mi |
How we ranked Lake Oswego septic service companies
We scored 63 Lake Oswego 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 Lake Oswego 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 Lake Oswego: frequently asked questions
Who is the best septic service company in Lake Oswego?
By CR Score, the highest-ranked septic service company in Lake Oswego, OR is Wild Pine Plumbing with a CR Score of 62/100. It has 4.9★ from 100 Google reviews. It is open 24/7. Lil' Stinky Septic Service (#2) and Scout Septic, Grease & Drain (#3) follow. We ranked 63 septic service companies on ten factors, last updated November 3, 2026.
How many septic service companies are there in Lake Oswego?
ContractorsRanked ranks 63 septic service companies serving Lake Oswego, OR. 1 of them is based in Lake Oswego; the rest serve it from nearby towns. Another 20 within 25 mi are listed but not ranked yet. Counts are as of November 2026.
Which septic service companies in Lake Oswego are open 24/7?
29 ranked septic service companies in Lake Oswego post 24/7 hours. The highest-ranked are Wild Pine Plumbing (#1), Lil' Stinky Septic Service (#2) and Scout Septic, Grease & Drain (#3). Hours come from each business's Google listing as of November 2026, so call to confirm.
Which septic service companies in Lake Oswego work on weekends?
42 of 63 ranked septic service companies post Saturday hours and 34 post Sunday hours. The highest-ranked open Saturdays are Wild Pine Plumbing (#1), Lil' Stinky Septic Service (#2) and Scout Septic, Grease & Drain (#3). Posted hours are office hours; crews may book weekend jobs separately.
What Google rating do Lake Oswego septic service companies have?
The median Google rating among 63 rated septic service companies in Lake Oswego is 4.9★, with a median of 37 reviews. Henco Plumbing Services has the most, 3,061 reviews, and ranks #17. 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 Lake Oswego count in this ranking?
Yes, if they are within 25 mi of the Lake Oswego 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 Lake Oswego
- November 2026: CR Scores recalculated for 63 septic service companies serving Lake Oswego.
- November 2026: 1 duplicate listing merged.
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