62/100CR Score
Ranked #1 because of its Google rating and trade focus: 4.9★ from 96 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 Windham, NH (2026)
89 septic service companies ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
The short answer
- 1
Best overall in Windham: LaFrance Septic Services, CR Score 62/100; 4.9★ from 96 Google reviews; open 7 days a week.
- 2
Best for emergencies (open 24/7): Carl's Septic Systems and Services in New Hampshire, posts 24/7 hours; ranked #2 of 89.
- 14
Most-reviewed: New Era Plumbing & HVAC, 1,003 Google reviews at 4.9★, the most of 89 ranked; ranked #14.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
89 Windham septic service companies are ranked here by CR Score, from ten published factors. 25 are open 24/7, 39 open Saturdays and 29 open Sundays, based on posted hours. The median Google rating is 4.9★ across 89 rated businesses.
Top 10 septic service companies in Windham at a glance
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | LaFrance Septic Services | 62 | 4.9★ (96) | Salem, 3 mi away | Sat · Sun | Overall |
| 2 | Carl's Septic Systems and Services in New Hampshire | 59 | 4.8★ (118) | Manchester, 18 mi away | 24/7 | Emergencies |
| 3 | John's Sewer & Drain Cleaning | 59 | 4.9★ (796) | Woburn, 21 mi away | 24/7 | — |
| 4 | Hamm Septic Services | 59 | 4.9★ (196) | Hudson, 5 mi away | — | — |
| 5 | Chongris Engineering LLC | 58 | 5.0★ (16) | Andover, 11 mi away | 24/7 | — |
| 6 | East Coast Pipe Service | 58 | 5.0★ (26) | East Concord, 8 mi away | Sat · Sun | — |
| 7 | Bateson Enterprises Inc | 58 | 4.6★ (27) | Andover, 13 mi away | 24/7 | — |
| 8 | Thompson's Sewer Service Inc. | 57 | 4.9★ (36) | Windham | — | — |
| 9 | US Water Consultants Inc | 57 | 4.1★ (20) | Windham | — | — |
| 10 | Derry Septic Service | 57 | 5.0★ (67) | Londonderry, 7 mi away | — | — |
The 89 best septic service companies in Windham, ranked
Ordered by CR Score, a 0–100 score from ten published factors. Paid placement never changes the order.
Based in Manchester, 18 mi away
59/100CR ScoreRanked #2 because of its Google rating and trade focus: 4.8★ from 118 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Woburn, 21 mi away
59/100CR ScoreRanked #3 because of its Google rating and review volume: 4.9★ from 796 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Hudson, 5 mi away
59/100CR ScoreRanked #4 because of its Google rating and trade focus: 4.9★ from 196 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Andover, 11 mi away
58/100CR ScoreRanked #5 because of its Google rating and trade focus: 5.0★ from 16 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in East Concord, 8 mi away
58/100CR ScoreRanked #6 because of its Google rating and trade focus: 5.0★ from 26 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Andover, 13 mi away
58/100CR ScoreRanked #7 because of its Google rating and trade focus: 4.6★ from 27 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Windham
57/100CR ScoreRanked #8 because of its Google rating and trade focus: 4.9★ from 36 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Windham
57/100CR ScoreRanked #9 because of its Google rating and trade focus: 4.1★ from 20 Google reviews, listed on Google as “Septic system service”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
Based in Londonderry, 7 mi away
57/100CR ScoreRanked #10 because of its Google rating and trade focus: 5.0★ from 67 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
#11 Sewer Bros.
Based in Andover, 21 mi away
56/100CR ScoreRanked #11 because of its Google rating and review volume: 5.0★ from 172 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
#12 Waste Warriors
Based in South Boston, 20 mi away
56/100CR ScoreRanked #12 because of its Google rating and trade focus: 5.0★ from 23 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
#13 Curtis Septic
Based in Leominster, 20 mi away
56/100CR ScoreRanked #13 because of its Google rating and trade focus: 5.0★ from 21 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Dracut, 9 mi away
56/100CR ScoreRanked #14 because of its Google rating and review volume: 4.9★ from 1,003 Google reviews, the most in Windham.
Based on 8 of 10 factors; credentials and recency not yet collected.
#15 Sewer Surgeons
Based in Derry, 11 mi away
56/100CR ScoreRanked #15 because of its Google rating and trade focus: 5.0★ from 5 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Hudson, 6 mi away
56/100CR ScoreRanked #16 because of its Google rating and review volume: 4.9★ from 380 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Plaistow, 12 mi away
56/100CR ScoreRanked #17 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 Hampstead, 9 mi away
56/100CR ScoreRanked #18 because of its Google rating and trade focus: 4.8★ from 31 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
#19 Rooter Man
Based in Lawrence, 11 mi away
56/100CR ScoreRanked #19 because of its Google rating and review volume: 5.0★ from 118 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
#20 Wayne's Drains
Based in Burlington, 21 mi away
56/100CR ScoreRanked #20 because of its Google rating and trade focus: 4.3★ from 59 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
#21 Kent Septic LLC
Based in Manchester, 19 mi away
55/100CR ScoreRanked #21 because of its Google rating and trade focus: 4.8★ from 287 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
#22 R M Ratta Corp
Based in Fitchburg, 20 mi away
55/100CR ScoreRanked #22 because of its Google rating and trade focus: 4.9★ from 204 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Groveland, 15 mi away
55/100CR ScoreRanked #23 because of its Google rating and trade focus: 5.0★ from 5 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Nashua, 9 mi away
55/100CR ScoreRanked #24 because of its Google rating and trade focus: 4.8★ from 56 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Concord, 25 mi away
55/100CR ScoreRanked #25 because of its Google rating and review volume: 4.9★ from 609 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Septic service companies ranked #26 to #50
#1 to #25 are shown in full above. Here are #26 to #50, in CR Score order; each links to its profile. We publish the top 50 of 89 ranked septic service companies here; the rest are on their profiles.
Also serving Windham
20 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 |
|---|---|---|
| A-1 Septic & Excavating | 4 mi | |
| A-Bee Septic LLC | 5.0★ (1) | 11 mi |
| ABC Plumbing Drain Sewer Clng | 5.0★ (1) | 21 mi |
| Al's Septic & Excavation | 3.0★ (2) | 6 mi |
| Biolex Septic Services | 8 mi | |
| Borough Sewer Services | 4.0★ (1) | 12 mi |
| Farrell Contracting Services, LLC | 5.0★ (2) | 23 mi |
| G. Nichols Construction Co., Inc | 5.0★ (2) | 25 mi |
| Land Engineering & Envrmntl | 5.0★ (2) | 11 mi |
| Liberty Septic Services, LLC | 5.0★ (1) | 18 mi |
| Milltown Plumbing, Heating, Air Conditioning, Drain Cleaning & Electrical | 9 mi | |
| N P Giroux Excavating LLC | 4.0★ (1) | 22 mi |
| QUIRK Real Estate Sales, Development and Construction | 3.0★ (2) | 10 mi |
| Sandford Surveying and Engineering, Inc. | 5.0★ (1) | 19 mi |
| Sewer Works | 5.0★ (2) | 11 mi |
| Slate Corporation | 5.0★ (1) | 15 mi |
| South Road Designs | 5.0★ (1) | 25 mi |
| Stewart Septic Services | 3.0★ (2) | 4 mi |
| Title 5 Inspection | 5.0★ (1) | 11 mi |
| Wind River Environmental of Gloucester, MA | 5.0★ (1) | 23 mi |
How we ranked Windham septic service companies
We scored 89 Windham 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 Windham 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 Windham: frequently asked questions
Who is the best septic service company in Windham?
By CR Score, the highest-ranked septic service company in Windham, NH is LaFrance Septic Services with a CR Score of 62/100. It has 4.9★ from 96 Google reviews. It is open 7 days a week. Carl's Septic Systems and Services in New Hampshire (#2) and John's Sewer & Drain Cleaning (#3) follow. We ranked 89 septic service companies on ten factors, last updated November 3, 2026.
How many septic service companies are there in Windham?
ContractorsRanked ranks 89 septic service companies serving Windham, NH. 2 of them are based in Windham; the rest serve it from nearby towns. Another 20 within 25 mi are listed but not ranked yet. Counts are as of November 2026.
Which septic service companies in Windham are open 24/7?
25 ranked septic service companies in Windham post 24/7 hours. The highest-ranked are Carl's Septic Systems and Services in New Hampshire (#2), John's Sewer & Drain Cleaning (#3) and Chongris Engineering LLC (#5). Hours come from each business's Google listing as of November 2026, so call to confirm.
Which septic service companies in Windham work on weekends?
39 of 89 ranked septic service companies post Saturday hours and 29 post Sunday hours. The highest-ranked open Saturdays are LaFrance Septic Services (#1), Carl's Septic Systems and Services in New Hampshire (#2) and John's Sewer & Drain Cleaning (#3). Posted hours are office hours; crews may book weekend jobs separately.
What Google rating do Windham septic service companies have?
The median Google rating among 89 rated septic service companies in Windham is 4.9★, with a median of 20 reviews. New Era Plumbing & HVAC has the most, 1,003 reviews, and ranks #14. 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 Windham count in this ranking?
Yes, if they are within 25 mi of the Windham 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 Windham
- November 2026: CR Scores recalculated for 89 septic service companies serving Windham.
- November 2026: 1 duplicate listing merged.
More septic service companies and Windham pages
Septic service companies near Windham
- Septic service companies in Pelham, NH92 ranked
- Septic service companies in Salem, NH89 ranked
- Septic service companies in Derry, NH83 ranked
- Septic service companies in Londonderry, NH81 ranked
- Septic service companies in Derry Village, NH81 ranked
- Septic service companies in Nashua, NH87 ranked
- Septic service companies in Merrimack, NH70 ranked
- Septic service companies in Bedford, NH57 ranked
- Septic service companies in Manchester, NH58 ranked
- Septic service companies in Durham, NH33 ranked
Other trades in Windham
- Roofers in Windham973 ranked
- Plumbers in Windham525 ranked
- Electricians in Windham464 ranked
- HVAC contractors in Windham747 ranked
- General contractors in Windham727 ranked
- Painters in Windham222 ranked
- Landscapers in Windham299 ranked
- Handymen in Windham96 ranked
- Kitchen remodelers in Windham407 ranked
- Bathroom remodelers in Windham398 ranked
- Flooring contractors in Windham248 ranked
- Tile installers in Windham44 ranked
- Drywall contractors in Windham21 ranked
- Concrete contractors in Windham126 ranked
- Fence contractors in Windham117 ranked
- Deck builders in Windham227 ranked
- Siding contractors in Windham490 ranked
- Window installers in Windham383 ranked
- Gutter installers in Windham155 ranked
- Insulation contractors in Windham73 ranked
- Solar installers in Windham135 ranked
- Garage door repair companies in Windham78 ranked
- Foundation repair companies in Windham179 ranked
- Tree services in Windham253 ranked
- Masonry contractors in Windham325 ranked
- Water damage restoration companies in Windham392 ranked
- Home builders in Windham481 ranked
- Demolition contractors in Windham82 ranked
- Window cleaners in Windham41 ranked
- Pressure washing companies in Windham95 ranked
- Pest control companies in Windham96 ranked
- Paving contractors in Windham177 ranked
- Auto glass repair shops in Windham78 ranked
- Excavating contractors in Windham203 ranked
- Pool builders in Windham167 ranked
- All contractors in Windham