64/100CR Score
Ranked #1 because of its Google rating and trade focus: 4.7★ from 62 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Best Septic Service Companies in Decatur, IL (2026)
10 septic service companies ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
The short answer
- 1
Best overall in Decatur: Parks Sewer Services Inc., CR Score 64/100; 4.7★ from 62 Google reviews; open 24/7.
- 7
Best for emergencies (open 24/7): JB Sewer And pumping, posts 24/7 hours; ranked #7 of 10.
- 2
Most-reviewed: Kelley's Septic Tank & Sewer Service Inc, 270 Google reviews at 4.9★, the most of 10 ranked; ranked #2.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
10 Decatur septic service companies are ranked here by CR Score, from ten published factors. 2 are open 24/7, 5 open Saturdays and 2 open Sundays, based on posted hours. The median Google rating is 4.8★ across 10 rated businesses.
Top 10 septic service companies in Decatur at a glance
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Parks Sewer Services Inc. | 64 | 4.7★ (62) | Decatur | 24/7 | Overall |
| 2 | Kelley's Septic Tank & Sewer Service Inc | 59 | 4.9★ (270) | Decatur | — | Most reviews |
| 3 | Septic Specialist | 56 | 4.2★ (31) | Decatur | — | — |
| 4 | Lomax Septic Systems | 54 | 4.6★ (25) | Mount Vernon, 18 mi away | Sat · Evenings | — |
| 5 | A1 Sewer Services | 53 | 4.1★ (10) | Decatur | — | — |
| 6 | Beiler Septics Inc. | 51 | 5.0★ (8) | Douglas, 24 mi away | Sat | — |
| 7 | JB Sewer And pumping | 49 | 3.7★ (3) | Cicero, 18 mi away | 24/7 | Emergencies |
| 8 | Abc Septic And Drain Co. | 48 | 5.0★ (13) | Vincennes, 24 mi away | Sat | — |
| 9 | ALL CLEAR SEWER WORKS | 47 | 5.0★ (3) | DeKalb, 17 mi away | — | — |
| 10 | DCS Excavation& Trucking LLC | 42 | 5.0★ (3) | Douglas, 18 mi away | — | — |
The 10 best septic service companies in Decatur, ranked
Ordered by CR Score, a 0–100 score from ten published factors. Paid placement never changes the order.
Based in Decatur
59/100CR ScoreRanked #2 because of its Google rating and review volume: 4.9★ from 270 Google reviews, the most in Decatur.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Decatur
56/100CR ScoreRanked #3 because of its Google rating and trade focus: 4.2★ from 31 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, 18 mi away
54/100CR ScoreRanked #4 because of its Google rating and trade focus: 4.6★ 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 Decatur
53/100CR ScoreRanked #5 because of its Google rating and trade focus: 4.1★ from 10 Google reviews, listed on Google as “Plumber”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
Based in Douglas, 24 mi away
51/100CR ScoreRanked #6 because of its Google rating and trade focus: 5.0★ 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 Cicero, 18 mi away
49/100CR ScoreRanked #7 because of its Google rating and trade focus: 3.7★ from 3 Google reviews, listed on Google as “Plumber”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Vincennes, 24 mi away
48/100CR ScoreRanked #8 because of its Google rating and trade focus: 5.0★ from 13 Google reviews, listed on Google as “Plumber”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in DeKalb, 17 mi away
47/100CR ScoreRanked #9 because of its Google rating and trade focus: 5.0★ from 3 Google reviews, listed on Google as “Plumber”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
Based in Douglas, 18 mi away
42/100CR ScoreRanked #10 because of its Google rating and trade focus: 5.0★ from 3 Google reviews, listed on Google as “Concrete contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Also serving Decatur
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 |
|---|---|---|
| Barr & Robison Sewer & Excavating | In Decatur | |
| Jr Excavating Sewer & Water | 3.0★ (2) | 18 mi |
| Redbud Septic, Sewer, & Excavating | 24 mi | |
| Riley's Decatur Sewer Services | 5.0★ (1) | In Decatur |
| Robinson Dirtworks | In Decatur |
How we ranked Decatur septic service companies
We scored 10 Decatur 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 2, 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 Decatur 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 Decatur: frequently asked questions
Who is the best septic service company in Decatur?
By CR Score, the highest-ranked septic service company in Decatur, IL is Parks Sewer Services Inc. with a CR Score of 64/100. It has 4.7★ from 62 Google reviews. It is open 24/7. Kelley's Septic Tank & Sewer Service Inc (#2) and Septic Specialist (#3) follow. We ranked 10 septic service companies on ten factors, last updated November 2, 2026.
How many septic service companies are there in Decatur?
ContractorsRanked ranks 10 septic service companies serving Decatur, IL. 4 of them are based in Decatur; 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 Decatur are open 24/7?
2 ranked septic service companies in Decatur post 24/7 hours. The highest-ranked are Parks Sewer Services Inc. (#1) and JB Sewer And pumping (#7). Hours come from each business's Google listing as of November 2026, so call to confirm.
Which septic service companies in Decatur work on weekends?
5 of 10 ranked septic service companies post Saturday hours and 2 post Sunday hours. The highest-ranked open Saturdays are Parks Sewer Services Inc. (#1), Lomax Septic Systems (#4) and Beiler Septics Inc. (#6). Posted hours are office hours; crews may book weekend jobs separately.
What Google rating do Decatur septic service companies have?
The median Google rating among 10 rated septic service companies in Decatur is 4.8★, with a median of 12 reviews. Kelley's Septic Tank & Sewer Service Inc has the most, 270 reviews, and ranks #2. 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 Decatur count in this ranking?
Yes, if they are within 25 mi of the Decatur 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 Decatur
- November 2026: CR Scores recalculated for 10 septic service companies serving Decatur.
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