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Best Septic Service Companies in Marlborough, MA (2026)

112 septic service companies ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →

The short answer

  1. 1

    Best overall in Marlborough: Wind River Environmental of Walpole, MA, CR Score 63/100; 4.9★ from 846 Google reviews; open 24/7.

  2. 2

    Best for emergencies (open 24/7): Northboro / Curtis Septic Service, posts 24/7 hours; ranked #2 of 112.

  3. 13

    Most-reviewed: Wind River Environmental, 854 Google reviews at 4.9★, the most of 112 ranked; ranked #13.

Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank

112 Marlborough septic service companies are ranked here by CR Score, from ten published factors. 40 are open 24/7, 65 open Saturdays and 45 open Sundays, based on posted hours. The median Google rating is 4.9★ across 112 rated businesses.

Most of this list also appears on the Septic service companies in Framingham Center ranking. See Septic service companies in Framingham Center

Top 10 septic service companies in Marlborough at a glance

Top 10 septic service companies in Marlborough at a glance
RankBusinessCR ScoreGoogle ratingBased inHoursBest for
1Wind River Environmental of Walpole, MA634.9★ (846)Walpole, 21 mi away24/7Overall
2Northboro / Curtis Septic Service624.9★ (73)Northborough, 4 mi away24/7Emergencies
3Fairbank Septic Pumping LLC624.9★ (93)Sudbury, 7 mi away24/7—
4JL Darling Septic Tank Pumping625.0★ (382)Uxbridge, 22 mi away24/7—
5Grant's Septic Techs625.0★ (590)Worcester, 13 mi awaySat—
6Curtis Septic Service614.7★ (77)Stow, 7 mi away24/7—
7CSI-Culley's Septic Inc604.9★ (141)Marlborough——
8Smith Septic595.0★ (17)Franklin, 9 mi away24/7—
9John's Sewer & Drain Cleaning584.9★ (796)Woburn, 24 mi away24/7—
10Woburn Drains & Sewer584.8★ (32)Boston, 14 mi away24/7—

The 112 best septic service companies in Marlborough, ranked

Ordered by CR Score, a 0–100 score from ten published factors. Paid placement never changes the order.

Scores below: based on 8 of 10 factors; credentials and recency not yet collected. Hatched segments mark factors we don't have yet.

  5. #5 Grant's Septic Techs

    Based in Worcester, 13 mi away

    62/100CR Score

    Ranked #5 because of its Google rating and trade focus: 5.0★ from 590 Google reviews, listed on Google as “Septic system service”.

    • 5.0★ from 590 Google reviews
    Hours
    Mon–Fri 7 AM–5 PM · Sat 9 AM–2 PM · Sun closed
    Address
    5 Farm St, Upton, MA 01568
    View profile for Grant's Septic Techs(508) 529-6255

  8. #8 Smith Septic

    Based in Franklin, 9 mi away

    59/100CR Score

    Ranked #8 because of its Google rating and trade focus: 5.0★ from 17 Google reviews, listed on Google as “Septic system service”.

    • 5.0★ from 17 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    View profile for Smith Septic(774) 248-4793

  12. #12 Curtis Septic

    Based in Leominster, 15 mi away

    58/100CR Score

    Ranked #12 because of its Google rating and trade focus: 5.0★ from 21 Google reviews, listed on Google as “Septic system service”.

    • 5.0★ from 21 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    6 Meetinghouse Rd, Littleton, MA 01460
    View profile for Curtis Septic(978) 540-5555

  16. #16 Rhino Rooter

    Based in Boston, 19 mi away

    57/100CR Score

    Ranked #16 because of its Google rating and trade focus: 5.0★ from 25 Google reviews, listed on Google as “Septic system service”.

    • 5.0★ from 25 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    View profile for Rhino Rooter(617) 360-1553

  18. #18 ADC Septic

    Based in Blackstone, 22 mi away

    57/100CR Score

    Ranked #18 because of its Google rating and trade focus: 4.7★ from 53 Google reviews, listed on Google as “Septic system service”.

    • 4.7★ from 53 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    295 Lincoln St, Blackstone, MA 01504
    View profile for ADC Septic(508) 883-9000

  19. #19 R M Ratta Corp

    Based in Fitchburg, 16 mi away

    57/100CR Score

    Ranked #19 because of its Google rating and trade focus: 4.9★ from 204 Google reviews, listed on Google as “Septic system service”.

    • 4.9★ from 204 Google reviews
    Hours
    Mon–Fri 8 AM–5 PM · Sat–Sun closed
    Address
    81 Westford Rd, Ayer, MA 01432
    View profile for R M Ratta Corp(978) 772-1600

  21. #21 Waste Warriors

    Based in South Boston, 22 mi away

    56/100CR Score

    Ranked #21 because of its Google rating and trade focus: 5.0★ from 23 Google reviews, listed on Google as “Septic system service”.

    • 5.0★ from 23 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    View profile for Waste Warriors(857) 297-4912

  24. #24 Wayne's Drains

    Based in Burlington, 21 mi away

    56/100CR Score

    Ranked #24 because of its Google rating and trade focus: 4.3★ from 59 Google reviews, listed on Google as “Septic system service”.

    • 4.3★ from 59 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    36 Grant Ave, Burlington, MA 01803
    View profile for Wayne's Drains(781) 272-3100

How we ranked Marlborough septic service companies

We scored 112 Marlborough 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.

Read the full method: formula, sources and exclusions

CR Score factors and weights
FactorWeightComputed fromIn Marlborough data
Reputation25%Google star rating, adjusted for how many reviews back itMeasured
Credentials15%Active state license, bond and workers’ comp on fileNot yet collected
Review volume10%Number of Google reviews, compared with the most-reviewed business on the listMeasured
Recency5%Share of reviews from the last 12 monthsNot yet collected
Availability5%Weekly open hours, Saturday, Sunday, 24/7 or same-dayMeasured
Trade focus10%How clearly the business does this trade (its Google category and name)Measured
Proximity5%Based in the city scores highest, less the farther away it isMeasured
Claimed profile10%The business has claimed its ContractorsRanked profile (free or paid earn the same)Measured
Partnered5%The business links to ContractorsRanked from its own website with our badge, checked periodicallyMeasured
ContractorsRanked reviews10%Verified customer reviews collected by ContractorsRanked: their rating and how many there areMeasured

Septic service companies in Marlborough: frequently asked questions

Who is the best septic service company in Marlborough?

By CR Score, the highest-ranked septic service company in Marlborough, MA is Wind River Environmental of Walpole, MA with a CR Score of 63/100. It has 4.9★ from 846 Google reviews. It is open 24/7. Northboro / Curtis Septic Service (#2) and Fairbank Septic Pumping LLC (#3) follow. We ranked 112 septic service companies on ten factors, last updated November 2, 2026.

How many septic service companies are there in Marlborough?

ContractorsRanked ranks 112 septic service companies serving Marlborough, MA. 2 of them are based in Marlborough; the rest serve it from nearby towns. Counts are as of November 2026.

Which septic service companies in Marlborough are open 24/7?

40 ranked septic service companies in Marlborough post 24/7 hours. The highest-ranked are Wind River Environmental of Walpole, MA (#1), Northboro / Curtis Septic Service (#2) and Fairbank Septic Pumping LLC (#3). Hours come from each business's Google listing as of November 2026, so call to confirm.

Which septic service companies in Marlborough work on weekends?

65 of 112 ranked septic service companies post Saturday hours and 45 post Sunday hours. The highest-ranked open Saturdays are Wind River Environmental of Walpole, MA (#1), Northboro / Curtis Septic Service (#2) and Fairbank Septic Pumping LLC (#3). Posted hours are office hours; crews may book weekend jobs separately.

What Google rating do Marlborough septic service companies have?

The median Google rating among 112 rated septic service companies in Marlborough is 4.9★, with a median of 17 reviews. Wind River Environmental has the most, 854 reviews, and ranks #13. 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 Marlborough count in this ranking?

Yes, if they are within 25 mi of the Marlborough 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 Marlborough

  1. November 2026: CR Scores recalculated for 112 septic service companies serving Marlborough.

More septic service companies and Marlborough pages

Other trades in Marlborough