62/100CR Score
Ranked #1 because of its Google rating and review volume: 4.8★ from 102 Google reviews, the most in Fond du Lac.
Based on 8 of 10 factors; credentials and recency not yet collected.
Best Septic Service Companies in Fond du Lac, WI (2026)
12 septic service companies ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
The short answer
- 1
Best overall in Fond du Lac: Fondy Sewer and Drain, CR Score 62/100; 4.8★ from 102 Google reviews; open 7 days a week.
- 9
Most-reviewed: Plymouth Plumbing & Heating, 74 Google reviews at 4.6★, the most of 12 ranked after Fondy Sewer and Drain; ranked #9.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
12 Fond du Lac septic service companies are ranked here by CR Score, from ten published factors. 1 open Saturdays and 1 open Sundays, based on posted hours. The median Google rating is 4.5★ across 12 rated businesses.
Top 10 septic service companies in Fond du Lac at a glance
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Fondy Sewer and Drain | 62 | 4.8★ (102) | Fond du Lac | Sat · Sun · Evenings | Overall |
| 2 | Pit-Stop Portables | 60 | 4.8★ (52) | Fond du Lac | — | — |
| 3 | Laudolff Septic Services, LLC | 59 | 4.7★ (41) | Fond du Lac | — | — |
| 4 | Lakeshore Septic Services | 52 | 4.5★ (8) | Oshkosh, 17 mi away | — | — |
| 5 | Dean Septic Services | 52 | 3.7★ (3) | Fond du Lac | — | — |
| 6 | Winnebago Liquid Waste | 51 | 4.4★ (24) | Oshkosh, 23 mi away | — | — |
| 7 | Pat Mand Boring Trench-Septic | 51 | 5.0★ (3) | Fond du Lac | — | — |
| 8 | Mand Plumbing LLC | 50 | 3.8★ (29) | Fond du Lac | — | — |
| 9 | Plymouth Plumbing & Heating | 48 | 4.6★ (74) | Plymouth, 25 mi away | — | Most reviews |
| 10 | Sammons Plumbing | 47 | 4.4★ (40) | Oshkosh, 19 mi away | — | — |
The 12 best septic service companies in Fond du Lac, ranked
Ordered by CR Score, a 0–100 score from ten published factors. Paid placement never changes the order.
Based in Fond du Lac
60/100CR ScoreRanked #2 because of its Google rating and trade focus: 4.8★ from 52 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Fond du Lac
59/100CR ScoreRanked #3 because of its Google rating and trade focus: 4.7★ from 41 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Oshkosh, 17 mi away
52/100CR ScoreRanked #4 because of its Google rating and trade focus: 4.5★ from 8 Google reviews, listed on Google as “Septic system service”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
Based in Fond du Lac
52/100CR ScoreRanked #5 because of its Google rating and trade focus: 3.7★ 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 Oshkosh, 23 mi away
51/100CR ScoreRanked #6 because of its Google rating and trade focus: 4.4★ from 24 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Fond du Lac
51/100CR ScoreRanked #7 because of its Google rating and trade focus: 5.0★ from 3 Google reviews, listed on Google as “Excavating contractor”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
Based in Fond du Lac
50/100CR ScoreRanked #8 because of its Google rating and review volume: 3.8★ from 29 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Plymouth, 25 mi away
48/100CR ScoreRanked #9 because of its Google rating and review volume: 4.6★ from 74 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
#10 Sammons Plumbing
Based in Oshkosh, 19 mi away
47/100CR ScoreRanked #10 because of its Google rating and review volume: 4.4★ from 40 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Oshkosh, 18 mi away
46/100CR ScoreRanked #11 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 Beaver Dam, 25 mi away
42/100CR ScoreRanked #12 because of its Google rating and trade focus: 3.0★ from 5 Google reviews, listed on Google as “Plumber”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Also serving Fond du Lac
1 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 | Distance |
|---|---|
| Wieser Concrete Products Inc | In Fond du Lac |
How we ranked Fond du Lac septic service companies
We scored 12 Fond du Lac 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 Fond du Lac 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 Fond du Lac: frequently asked questions
Who is the best septic service company in Fond du Lac?
By CR Score, the highest-ranked septic service company in Fond du Lac, WI is Fondy Sewer and Drain with a CR Score of 62/100. It has 4.8★ from 102 Google reviews. It is open 7 days a week. Pit-Stop Portables (#2) and Laudolff Septic Services, LLC (#3) follow. We ranked 12 septic service companies on ten factors, last updated November 3, 2026.
How many septic service companies are there in Fond du Lac?
ContractorsRanked ranks 12 septic service companies serving Fond du Lac, WI. 6 of them are based in Fond du Lac; the rest serve it from nearby towns. Another 1 within 25 mi are listed but not ranked yet. Counts are as of November 2026.
Which septic service companies in Fond du Lac work on weekends?
1 of 12 ranked septic service companies post Saturday hours and 1 post Sunday hours. The highest-ranked open Saturdays is Fondy Sewer and Drain (#1). Posted hours are office hours; crews may book weekend jobs separately.
What Google rating do Fond du Lac septic service companies have?
The median Google rating among 12 rated septic service companies in Fond du Lac is 4.5★, with a median of 27 reviews. Fondy Sewer and Drain has the most, 102 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 Fond du Lac count in this ranking?
Yes, if they are within 25 mi of the Fond du Lac 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 Fond du Lac
- November 2026: CR Scores recalculated for 12 septic service companies serving Fond du Lac.
More septic service companies and Fond du Lac pages
Septic service companies near Fond du Lac
- Septic service companies in Waupun, WI8 ranked
- Septic service companies in Oshkosh, WI18 ranked
- Septic service companies in West Bend, WI24 ranked
- Septic service companies in Neenah, WI21 ranked
- Septic service companies in Menasha, WI22 ranked
- Septic service companies in Beaver Dam, WI6 ranked
- Septic service companies in Hartford, WI31 ranked
- Septic service companies in Appleton, WI26 ranked
- Septic service companies in Little Chute, WI30 ranked
- Septic service companies in Kaukauna, WI30 ranked
Other trades in Fond du Lac
- Roofers in Fond du Lac207 ranked
- Plumbers in Fond du Lac46 ranked
- Electricians in Fond du Lac39 ranked
- HVAC contractors in Fond du Lac41 ranked
- General contractors in Fond du Lac41 ranked
- Painters in Fond du Lac15 ranked
- Landscapers in Fond du Lac23 ranked
- Kitchen remodelers in Fond du Lac24 ranked
- Bathroom remodelers in Fond du Lac28 ranked
- Flooring contractors in Fond du Lac15 ranked
- Concrete contractors in Fond du Lac22 ranked
- Fence contractors in Fond du Lac6 ranked
- Deck builders in Fond du Lac15 ranked
- Siding contractors in Fond du Lac92 ranked
- Window installers in Fond du Lac84 ranked
- Gutter installers in Fond du Lac16 ranked
- Insulation contractors in Fond du Lac8 ranked
- Solar installers in Fond du Lac7 ranked
- Foundation repair companies in Fond du Lac24 ranked
- Tree services in Fond du Lac46 ranked
- Masonry contractors in Fond du Lac16 ranked
- Water damage restoration companies in Fond du Lac50 ranked
- Home builders in Fond du Lac98 ranked
- Demolition contractors in Fond du Lac6 ranked
- Window cleaners in Fond du Lac7 ranked
- Pressure washing companies in Fond du Lac7 ranked
- Pest control companies in Fond du Lac13 ranked
- Paving contractors in Fond du Lac9 ranked
- Auto glass repair shops in Fond du Lac7 ranked
- Excavating contractors in Fond du Lac33 ranked
- Pool builders in Fond du Lac16 ranked
- All contractors in Fond du Lac