60/100CR Score
Ranked #1 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.
Best Septic Service Companies in Norwalk, IA (2026)
20 septic service companies ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
The short answer
- 1
Best overall in Norwalk: Mike killen construction, CR Score 60/100; 5.0★ from 31 Google reviews; open 24/7.
- 2
Best for emergencies (open 24/7): Smith's Sewer Service Inc., posts 24/7 hours; ranked #2 of 20.
- 5
Most-reviewed: Total Comfort Group, 507 Google reviews at 4.7★, the most of 20 ranked; ranked #5.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
20 Norwalk septic service companies are ranked here by CR Score, from ten published factors. 9 are open 24/7, 13 open Saturdays and 11 open Sundays, based on posted hours. The median Google rating is 4.8★ across 20 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 Norwalk at a glance
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Mike killen construction | 60 | 5.0★ (31) | Des Moines, 8 mi away | 24/7 | Overall |
| 2 | Smith's Sewer Service Inc. | 59 | 4.6★ (483) | Johnston, 14 mi away | 24/7 | Emergencies |
| 3 | Bob's Septic & Portable Restroom Service | 58 | 4.3★ (84) | Des Moines, 13 mi away | 24/7 | — |
| 4 | Beebe Drain and Sewer Co. | 57 | 5.0★ (48) | Clive, 10 mi away | 24/7 | — |
| 5 | Total Comfort Group | 56 | 4.7★ (507) | Clive, 18 mi away | 24/7 | Most reviews |
| 6 | Bob's Sewerooter Services | 56 | 4.8★ (123) | Des Moines, 14 mi away | Sat · Sun · Evenings | — |
| 7 | Zippy Drain | 55 | 4.8★ (260) | Clive, 18 mi away | 24/7 | — |
| 8 | Rogers Septic Maintenance & Repair | 55 | 4.6★ (54) | Des Moines, 14 mi away | 24/7 | — |
| 9 | A-1 Complete Septic Tank Services | 54 | 4.4★ (27) | Pleasant Hill, 12 mi away | — | — |
| 10 | Des Moines Drain & Sewer | 54 | 4.4★ (130) | Des Moines, 15 mi away | Sat · Sun | — |
The 20 best septic service companies in Norwalk, ranked
Ordered by CR Score, a 0–100 score from ten published factors. Paid placement never changes the order.
Based in Johnston, 14 mi away
59/100CR ScoreRanked #2 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.
Based in Des Moines, 13 mi away
58/100CR ScoreRanked #3 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 Clive, 10 mi away
57/100CR ScoreRanked #4 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.
Based in Clive, 18 mi away
56/100CR ScoreRanked #5 because of its Google rating and review volume: 4.7★ from 507 Google reviews, the most in Norwalk.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Des Moines, 14 mi away
56/100CR ScoreRanked #6 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.
#7 Zippy Drain
Based in Clive, 18 mi away
55/100CR ScoreRanked #7 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, 14 mi away
55/100CR ScoreRanked #8 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 Pleasant Hill, 12 mi away
54/100CR ScoreRanked #9 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 Des Moines, 15 mi away
54/100CR ScoreRanked #10 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 Indianola, 4 mi away
53/100CR ScoreRanked #11 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 Des Moines, 8 mi away
53/100CR ScoreRanked #12 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, 16 mi away
53/100CR ScoreRanked #13 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 Newton, 19 mi away
53/100CR ScoreRanked #14 because of its Google rating and trade focus: 5.0★ from 21 Google reviews, listed on Google as “Plumber”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Indianola, 10 mi away
52/100CR ScoreRanked #15 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 Grimes, 14 mi away
52/100CR ScoreRanked #16 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 Indianola, 10 mi away
50/100CR ScoreRanked #17 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.
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.
Based in Norwalk
50/100CR ScoreRanked #19 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.
#20 Gallon Plumbing
Based in Des Moines, 13 mi away
45/100CR ScoreRanked #20 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.
How we ranked Norwalk septic service companies
We scored 20 Norwalk 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 Norwalk 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 Norwalk: frequently asked questions
Who is the best septic service company in Norwalk?
By CR Score, the highest-ranked septic service company in Norwalk, IA is Mike killen construction with a CR Score of 60/100. It has 5.0★ from 31 Google reviews. It is open 24/7. Smith's Sewer Service Inc. (#2) and Bob's Septic & Portable Restroom Service (#3) follow. We ranked 20 septic service companies on ten factors, last updated November 3, 2026.
How many septic service companies are there in Norwalk?
ContractorsRanked ranks 20 septic service companies serving Norwalk, IA. 1 of them is based in Norwalk; the rest serve it from nearby towns. Counts are as of November 2026.
Which septic service companies in Norwalk are open 24/7?
9 ranked septic service companies in Norwalk post 24/7 hours. The highest-ranked are Mike killen construction (#1), Smith's Sewer Service Inc. (#2) and Bob's Septic & Portable Restroom Service (#3). Hours come from each business's Google listing as of November 2026, so call to confirm.
Which septic service companies in Norwalk work on weekends?
13 of 20 ranked septic service companies post Saturday hours and 11 post Sunday hours. The highest-ranked open Saturdays are Mike killen construction (#1), Smith's Sewer Service Inc. (#2) and Bob's Septic & Portable Restroom Service (#3). Posted hours are office hours; crews may book weekend jobs separately.
What Google rating do Norwalk septic service companies have?
The median Google rating among 20 rated septic service companies in Norwalk is 4.8★, with a median of 29 reviews. Total Comfort Group has the most, 507 reviews, and ranks #5. 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 Norwalk count in this ranking?
Yes, if they are within 25 mi of the Norwalk 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 Norwalk
- November 2026: CR Scores recalculated for 20 septic service companies serving Norwalk.
More septic service companies and Norwalk pages
Septic service companies near Norwalk
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