59/100CR Score
Ranked #1 because of its Google rating and review volume: 4.6★ from 1,806 Google reviews, the most in Washington.
Based on 8 of 10 factors; credentials and recency not yet collected.
Best Septic Service Companies in Washington, IL (2026)
20 septic service companies ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
The short answer
- 1
Best overall in Washington: Arnold & Sons Plumbing, Sewer & Drain, CR Score 59/100; 4.6★ from 1,806 Google reviews; open 24/7.
- 2
Best for emergencies (open 24/7): A & B Hunter Sewer Service Co, posts 24/7 hours; ranked #2 of 20.
- 5
Most-reviewed: Mr. Rooter Plumbing of Peoria, 868 Google reviews at 4.4★, the most of 20 ranked after Arnold & Sons Plumbing, Sewer & Drain; ranked #5.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
20 Washington septic service companies are ranked here by CR Score, from ten published factors. 7 are open 24/7, 10 open Saturdays and 9 open Sundays, based on posted hours. The median Google rating is 4.5★ across 20 rated businesses.
Top 10 septic service companies in Washington at a glance
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Arnold & Sons Plumbing, Sewer & Drain | 59 | 4.6★ (1,806) | Peoria, 12 mi away | 24/7 | Overall |
| 2 | A & B Hunter Sewer Service Co | 59 | 4.8★ (247) | Creve Coeur, 3 mi away | 24/7 | Emergencies |
| 3 | Hofstatter Material & Services | 56 | 4.9★ (30) | East Peoria, 6 mi away | — | — |
| 4 | Harris Septic Services | 56 | 4.8★ (37) | Peoria, 7 mi away | — | — |
| 5 | Mr. Rooter Plumbing of Peoria | 54 | 4.4★ (868) | Peoria, 13 mi away | 24/7 | Most reviews |
| 6 | Rooter -Matic Sewer Drain and Septic | 54 | 4.7★ (83) | Pekin, 15 mi away | 24/7 | — |
| 7 | Professional Sewer & Drain Services | 53 | 4.8★ (16) | Washington | Sat · Sun · Evenings | — |
| 8 | Grandy Services | 53 | 4.6★ (9) | Peoria, 17 mi away | 24/7 | — |
| 9 | Skinner Sewer Services LLC DBA A&B Hunter Sewer Service | 51 | 5.0★ (3) | Creve Coeur, 4 mi away | 24/7 | — |
| 10 | River City Septic & Excavating | 50 | 4.4★ (25) | Chillicothe, 13 mi away | — | — |
The 20 best septic service companies in Washington, ranked
Ordered by CR Score, a 0–100 score from ten published factors. Paid placement never changes the order.
Based in Creve Coeur, 3 mi away
59/100CR ScoreRanked #2 because of its Google rating and review volume: 4.8★ from 247 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in East Peoria, 6 mi away
56/100CR ScoreRanked #3 because of its Google rating and trade focus: 4.9★ from 30 Google reviews, listed on Google as “Septic system service”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
Based in Peoria, 7 mi away
56/100CR ScoreRanked #4 because of its Google rating and trade focus: 4.8★ from 37 Google reviews, listed on Google as “Septic system service”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
Based in Peoria, 13 mi away
54/100CR ScoreRanked #5 because of its Google rating and review volume: 4.4★ from 868 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Pekin, 15 mi away
54/100CR ScoreRanked #6 because of its Google rating and trade focus: 4.7★ from 83 Google reviews, listed on Google as “Plumber”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Washington
53/100CR ScoreRanked #7 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 Peoria, 17 mi away
53/100CR ScoreRanked #8 because of its Google rating and trade focus: 4.6★ 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 Creve Coeur, 4 mi away
51/100CR ScoreRanked #9 because of its Google rating and trade focus: 5.0★ from 3 Google reviews, listed on Google as “Plumber”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Chillicothe, 13 mi away
50/100CR ScoreRanked #10 because of its Google rating and trade focus: 4.4★ from 25 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Creve Coeur, 11 mi away
50/100CR ScoreRanked #11 because of its Google rating and trade focus: 4.5★ from 38 Google reviews, listed on Google as “Contractor”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
Based in Washington
49/100CR ScoreRanked #12 because of its Google rating and trade focus: 4.0★ from 4 Google reviews, listed on Google as “Plumber”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
Based in Peoria Heights, 9 mi away
49/100CR ScoreRanked #13 because of its Google rating and trade focus: 4.5★ from 58 Google reviews, listed on Google as “Plumber”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Creve Coeur, 9 mi away
49/100CR ScoreRanked #14 because of its Google rating and trade focus: 4.6★ from 36 Google reviews, listed on Google as “Plumber”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Peoria, 21 mi away
48/100CR ScoreRanked #15 because of its Google rating and trade focus: 4.9★ from 30 Google reviews, listed on Google as “Demolition contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Peoria, 17 mi away
48/100CR ScoreRanked #16 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 Peoria, 13 mi away
47/100CR ScoreRanked #17 because of its Google rating and availability: 3.6★ from 14 Google reviews, open 24/7.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Peoria, 14 mi away
45/100CR ScoreRanked #18 because of its Google rating and trade focus: 2.6★ from 5 Google reviews, listed on Google as “Plumber”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
Based in Pekin, 16 mi away
44/100CR ScoreRanked #19 because of its Google rating and review volume: 4.4★ from 50 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Chillicothe, 18 mi away
44/100CR ScoreRanked #20 because of its Google rating and trade focus: 3.1★ from 11 Google reviews, listed on Google as “Excavating contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Also serving Washington
4 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 |
|---|---|---|
| Coal Creek Septic | 10 mi | |
| Gary Wollenschlager Septic Systems & Excavating | 22 mi | |
| Monroe Excavating | 5.0★ (1) | 17 mi |
| Sludge Removal Services | 5.0★ (2) | 14 mi |
How we ranked Washington septic service companies
We scored 20 Washington 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 Washington 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 Washington: frequently asked questions
Who is the best septic service company in Washington?
By CR Score, the highest-ranked septic service company in Washington, IL is Arnold & Sons Plumbing, Sewer & Drain with a CR Score of 59/100. It has 4.6★ from 1,806 Google reviews. It is open 24/7. A & B Hunter Sewer Service Co (#2) and Hofstatter Material & Services (#3) follow. We ranked 20 septic service companies on ten factors, last updated November 3, 2026.
How many septic service companies are there in Washington?
ContractorsRanked ranks 20 septic service companies serving Washington, IL. 2 of them are based in Washington; the rest serve it from nearby towns. Another 4 within 25 mi are listed but not ranked yet. Counts are as of November 2026.
Which septic service companies in Washington are open 24/7?
7 ranked septic service companies in Washington post 24/7 hours. The highest-ranked are Arnold & Sons Plumbing, Sewer & Drain (#1), A & B Hunter Sewer Service Co (#2) and Mr. Rooter Plumbing of Peoria (#5). Hours come from each business's Google listing as of November 2026, so call to confirm.
Which septic service companies in Washington work on weekends?
10 of 20 ranked septic service companies post Saturday hours and 9 post Sunday hours. The highest-ranked open Saturdays are Arnold & Sons Plumbing, Sewer & Drain (#1), A & B Hunter Sewer Service Co (#2) and Mr. Rooter Plumbing of Peoria (#5). Posted hours are office hours; crews may book weekend jobs separately.
What Google rating do Washington septic service companies have?
The median Google rating among 20 rated septic service companies in Washington is 4.5★, with a median of 30 reviews. Arnold & Sons Plumbing, Sewer & Drain has the most, 1,806 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 Washington count in this ranking?
Yes, if they are within 25 mi of the Washington 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 Washington
- November 2026: CR Scores recalculated for 20 septic service companies serving Washington.
- November 2026: 1 duplicate listing merged.
More septic service companies and Washington pages
Septic service companies near Washington
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