62/100CR Score
Ranked #1 because of its Google rating and review volume: 4.6★ from 483 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Best Septic Service Companies in Johnston, IA (2026)
24 septic service companies ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
The short answer
- 1
Best overall in Johnston: Smith's Sewer Service Inc., CR Score 62/100; 4.6★ from 483 Google reviews; open 24/7.
- 2
Best for emergencies (open 24/7): Bob's Septic & Portable Restroom Service, posts 24/7 hours; ranked #2 of 24.
- 4
Most-reviewed: Total Comfort Group, 507 Google reviews at 4.7★, the most of 24 ranked; ranked #4.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
24 Johnston septic service companies are ranked here by CR Score, from ten published factors. 11 are open 24/7, 15 open Saturdays and 13 open Sundays, based on posted hours. The median Google rating is 4.6★ across 24 rated businesses.
Most of this list also appears on the Septic service companies in Des Moines ranking. See Septic service companies in Des Moines
Top 10 septic service companies in Johnston at a glance
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Smith's Sewer Service Inc. | 62 | 4.6★ (483) | Johnston | 24/7 | Overall |
| 2 | Bob's Septic & Portable Restroom Service | 60 | 4.3★ (84) | Des Moines, 7 mi away | 24/7 | Emergencies |
| 3 | Mike killen construction | 58 | 5.0★ (31) | Des Moines, 14 mi away | 24/7 | — |
| 4 | Total Comfort Group | 58 | 4.7★ (507) | Clive, 10 mi away | 24/7 | Most reviews |
| 5 | Beebe Drain and Sewer Co. | 58 | 5.0★ (48) | Clive, 5 mi away | 24/7 | — |
| 6 | Zippy Drain | 57 | 4.8★ (260) | Clive, 10 mi away | 24/7 | — |
| 7 | Rogers Septic Maintenance & Repair | 57 | 4.6★ (54) | Des Moines, 5 mi away | 24/7 | — |
| 8 | Bob's Sewerooter Services | 57 | 4.8★ (123) | Des Moines, 8 mi away | Sat · Sun · Evenings | — |
| 9 | Des Moines Drain & Sewer | 56 | 4.4★ (130) | Des Moines, 4 mi away | Sat · Sun | — |
| 10 | Roto-Rooter Sewer Drain Service | 54 | 4.6★ (168) | Ames, 24 mi away | 24/7 | — |
The 24 best septic service companies in Johnston, ranked
Ordered by CR Score, a 0–100 score from ten published factors. Paid placement never changes the order.
Based in Des Moines, 7 mi away
60/100CR ScoreRanked #2 because of its Google rating and trade focus: 4.3★ from 84 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Des Moines, 14 mi away
58/100CR ScoreRanked #3 because of its Google rating and trade focus: 5.0★ 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 Clive, 10 mi away
58/100CR ScoreRanked #4 because of its Google rating and review volume: 4.7★ from 507 Google reviews, the most in Johnston.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Clive, 5 mi away
58/100CR ScoreRanked #5 because of its Google rating and trade focus: 5.0★ from 48 Google reviews, listed on Google as “Plumber”.
Based on 8 of 10 factors; credentials and recency not yet collected.
#6 Zippy Drain
Based in Clive, 10 mi away
57/100CR ScoreRanked #6 because of its Google rating and review volume: 4.8★ from 260 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Des Moines, 5 mi away
57/100CR ScoreRanked #7 because of its Google rating and trade focus: 4.6★ from 54 Google reviews, listed on Google as “Plumber”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Des Moines, 8 mi away
57/100CR ScoreRanked #8 because of its Google rating and review volume: 4.8★ from 123 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Des Moines, 4 mi away
56/100CR ScoreRanked #9 because of its Google rating and review volume: 4.4★ from 130 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Ames, 24 mi away
54/100CR ScoreRanked #10 because of its Google rating and review volume: 4.6★ from 168 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Pleasant Hill, 12 mi away
54/100CR ScoreRanked #11 because of its Google rating and trade focus: 4.4★ from 27 Google reviews, listed on Google as “Septic system service”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
Based in Grimes, 6 mi away
54/100CR ScoreRanked #12 because of its Google rating and review volume: 4.9★ from 282 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Ames, 13 mi away
54/100CR ScoreRanked #13 because of its Google rating and trade focus: 4.6★ from 54 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Des Moines, 9 mi away
53/100CR ScoreRanked #14 because of its Google rating and trade focus: 4.8★ 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 Indianola, 19 mi away
52/100CR ScoreRanked #15 because of its Google rating and trade focus: 5.0★ 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 Indianola, 11 mi away
51/100CR ScoreRanked #16 because of its Google rating and trade focus: 5.0★ from 4 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Ames, 25 mi away
51/100CR ScoreRanked #17 because of its Google rating and review volume: 4.4★ from 145 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Des Moines, 12 mi away
50/100CR ScoreRanked #18 because of its Google rating and trade focus: 2.1★ from 11 Google reviews, listed on Google as “Septic system service”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
#19 Behle Inc
Based in Ames, 24 mi away
50/100CR ScoreRanked #19 because of its Google rating and review volume: 4.5★ from 65 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Indianola, 23 mi away
48/100CR ScoreRanked #20 because of its Google rating and trade focus: 5.0★ from 4 Google reviews, listed on Google as “Septic system service”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
Based in Indianola, 22 mi away
47/100CR ScoreRanked #21 because of its Google rating and trade focus: 4.3★ from 6 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
#22 Gallon Plumbing
Based in Des Moines, 7 mi away
47/100CR ScoreRanked #22 because of its Google rating and review volume: 4.3★ from 26 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Norwalk, 13 mi away
46/100CR ScoreRanked #23 because of its Google rating and trade focus: 5.0★ from 9 Google reviews, listed on Google as “Excavating contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Ames, 25 mi away
40/100CR ScoreRanked #24 because of its Google rating and review volume: 3.4★ from 22 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
How we ranked Johnston septic service companies
We scored 24 Johnston 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 Johnston 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 Johnston: frequently asked questions
Who is the best septic service company in Johnston?
By CR Score, the highest-ranked septic service company in Johnston, IA is Smith's Sewer Service Inc. with a CR Score of 62/100. It has 4.6★ from 483 Google reviews. It is open 24/7. Bob's Septic & Portable Restroom Service (#2) and Mike killen construction (#3) follow. We ranked 24 septic service companies on ten factors, last updated November 3, 2026.
How many septic service companies are there in Johnston?
ContractorsRanked ranks 24 septic service companies serving Johnston, IA. 1 of them is based in Johnston; the rest serve it from nearby towns. Counts are as of November 2026.
Which septic service companies in Johnston are open 24/7?
11 ranked septic service companies in Johnston post 24/7 hours. The highest-ranked are Smith's Sewer Service Inc. (#1), Bob's Septic & Portable Restroom Service (#2) and Mike killen construction (#3). Hours come from each business's Google listing as of November 2026, so call to confirm.
Which septic service companies in Johnston work on weekends?
15 of 24 ranked septic service companies post Saturday hours and 13 post Sunday hours. The highest-ranked open Saturdays are Smith's Sewer Service Inc. (#1), Bob's Septic & Portable Restroom Service (#2) and Mike killen construction (#3). Posted hours are office hours; crews may book weekend jobs separately.
What Google rating do Johnston septic service companies have?
The median Google rating among 24 rated septic service companies in Johnston is 4.6★, with a median of 51 reviews. Total Comfort Group has the most, 507 reviews, and ranks #4. 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 Johnston count in this ranking?
Yes, if they are within 25 mi of the Johnston 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 Johnston
- November 2026: CR Scores recalculated for 24 septic service companies serving Johnston.
More septic service companies and Johnston pages
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