63/100CR Score
Ranked #1 because of its Google rating and review volume: 4.8★ from 49 Google reviews, the most in Hermiston.
Best Septic Service Companies in Hermiston, OR (2026)
6 septic service companies ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
The short answer
- 1
Best overall in Hermiston: Westfall Septic, CR Score 63/100; 4.8★ from 49 Google reviews; open 24/7.
- 3
Best for emergencies (open 24/7): Frank's Sewer Services, posts 24/7 hours; ranked #3 of 6.
- 2
Most-reviewed: Andrews Sewer & Drain Service, LLP, 31 Google reviews at 4.8★, the most of 6 ranked after Westfall Septic; ranked #2.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
6 Hermiston septic service companies are ranked here by CR Score, from ten published factors. 2 are open 24/7, 4 open Saturdays and 3 open Sundays, based on posted hours. The median Google rating is 4.7★ across 6 rated businesses.
Top 6 septic service companies in Hermiston at a glance
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Westfall Septic | 63 | 4.8★ (49) | Hermiston | 24/7 | Overall |
| 2 | Andrews Sewer & Drain Service, LLP | 60 | 4.8★ (31) | Hermiston | Sat · Sun | Most reviews |
| 3 | Frank's Sewer Services | 58 | 4.1★ (11) | Hermiston | 24/7 | Emergencies |
| 4 | Done-Rite Septic | 53 | 4.2★ (10) | Hermiston | — | — |
| 5 | Pnw Irrigation and Excavation, LLC | 52 | 5.0★ (21) | Richland, 13 mi away | Sat · Evenings | — |
| 6 | Mahaffey Enterprises Inc | 45 | 4.5★ (14) | Kennewick, 25 mi away | — | — |
The 6 best septic service companies in Hermiston, 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 Hermiston
60/100CR ScoreRanked #2 because of its Google rating and review volume: 4.8★ from 31 Google reviews.
Based in Hermiston
58/100CR ScoreRanked #3 because of its Google rating and trade focus: 4.1★ from 11 Google reviews, listed on Google as “Plumber”.
Based in Hermiston
53/100CR ScoreRanked #4 because of its Google rating and trade focus: 4.2★ from 10 Google reviews, listed on Google as “Contractor”.
Based in Richland, 13 mi away
52/100CR ScoreRanked #5 because of its Google rating and review volume: 5.0★ from 21 Google reviews.
Based in Kennewick, 25 mi away
45/100CR ScoreRanked #6 because of its Google rating and review volume: 4.5★ from 14 Google reviews.
How we ranked Hermiston septic service companies
We scored 6 Hermiston 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 Hermiston 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 Hermiston: frequently asked questions
Who is the best septic service company in Hermiston?
By CR Score, the highest-ranked septic service company in Hermiston, OR is Westfall Septic with a CR Score of 63/100. It has 4.8★ from 49 Google reviews. It is open 24/7. Andrews Sewer & Drain Service, LLP (#2) and Frank's Sewer Services (#3) follow. We ranked 6 septic service companies on ten factors, last updated November 3, 2026.
How many septic service companies are there in Hermiston?
ContractorsRanked ranks 6 septic service companies serving Hermiston, OR. 4 of them are based in Hermiston; the rest serve it from nearby towns. Counts are as of November 2026.
Which septic service companies in Hermiston are open 24/7?
2 ranked septic service companies in Hermiston post 24/7 hours. The highest-ranked are Westfall Septic (#1) and Frank's Sewer Services (#3). Hours come from each business's Google listing as of November 2026, so call to confirm.
Which septic service companies in Hermiston work on weekends?
4 of 6 ranked septic service companies post Saturday hours and 3 post Sunday hours. The highest-ranked open Saturdays are Westfall Septic (#1), Andrews Sewer & Drain Service, LLP (#2) and Frank's Sewer Services (#3). Posted hours are office hours; crews may book weekend jobs separately.
What Google rating do Hermiston septic service companies have?
The median Google rating among 6 rated septic service companies in Hermiston is 4.7★, with a median of 18 reviews. Westfall Septic has the most, 49 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 Hermiston count in this ranking?
Yes, if they are within 25 mi of the Hermiston 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 Hermiston
- November 2026: CR Scores recalculated for 6 septic service companies serving Hermiston.
More septic service companies and Hermiston pages
Other trades in Hermiston
- Roofers in Hermiston69 ranked
- Plumbers in Hermiston15 ranked
- Electricians in Hermiston10 ranked
- HVAC contractors in Hermiston23 ranked
- General contractors in Hermiston30 ranked
- Painters in Hermiston7 ranked
- Landscapers in Hermiston5 ranked
- Kitchen remodelers in Hermiston7 ranked
- Bathroom remodelers in Hermiston8 ranked
- Flooring contractors in Hermiston5 ranked
- Concrete contractors in Hermiston5 ranked
- Fence contractors in Hermiston5 ranked
- Deck builders in Hermiston5 ranked
- Siding contractors in Hermiston28 ranked
- Window installers in Hermiston33 ranked
- Gutter installers in Hermiston7 ranked
- Solar installers in Hermiston11 ranked
- Water damage restoration companies in Hermiston29 ranked
- Home builders in Hermiston68 ranked
- Paving contractors in Hermiston5 ranked
- Auto glass repair shops in Hermiston6 ranked
- Excavating contractors in Hermiston8 ranked
- Pool builders in Hermiston13 ranked
- All contractors in Hermiston