63/100CR Score
Ranked #1 because of its Google rating and trade focus: 5.0★ from 382 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 Johnston, RI (2026)
109 septic service companies ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
The short answer
- 1
Best overall in Johnston: JL Darling Septic Tank Pumping, CR Score 63/100; 5.0★ from 382 Google reviews; open 24/7.
- 2
Best for emergencies (open 24/7): Wind River Environmental of Walpole, MA, posts 24/7 hours; ranked #2 of 109.
- 3
Most-reviewed: Mr. Rooter Plumbing of Rhode Island, 1,027 Google reviews at 4.9★, the most of 109 ranked; ranked #3.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
109 Johnston septic service companies are ranked here by CR Score, from ten published factors. 28 are open 24/7, 65 open Saturdays and 39 open Sundays, based on posted hours. The median Google rating is 4.8★ across 109 rated businesses.
Top 10 septic service companies in Johnston at a glance
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | JL Darling Septic Tank Pumping | 63 | 5.0★ (382) | Uxbridge, 16 mi away | 24/7 | Overall |
| 2 | Wind River Environmental of Walpole, MA | 62 | 4.9★ (846) | Walpole, 24 mi away | 24/7 | Emergencies |
| 3 | Mr. Rooter Plumbing of Rhode Island | 60 | 4.9★ (1,027) | Warwick, 7 mi away | 24/7 | Most reviews |
| 4 | ProSeptic | 60 | 5.0★ (123) | East Greenwich, 18 mi away | 24/7 | — |
| 5 | Parent Sanitation, a Wind River Company | 60 | 4.8★ (85) | Putnam, 14 mi away | 24/7 | — |
| 6 | Scituate Cesspool, Inc. | 59 | 4.7★ (59) | Johnston | Sat | — |
| 7 | ADC Septic | 58 | 4.7★ (53) | Blackstone, 14 mi away | 24/7 | — |
| 8 | DownEast Title V Inspections, LLC | 58 | 5.0★ (47) | Haverhill, 17 mi away | 24/7 | — |
| 9 | United Sewer And Drain | 58 | 5.0★ (77) | Pawtucket, 7 mi away | 24/7 | — |
| 10 | Grant's Septic Techs | 58 | 5.0★ (590) | Worcester, 25 mi away | Sat | — |
The 109 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 Walpole, 24 mi away
62/100CR ScoreRanked #2 because of its Google rating and trade focus: 4.9★ from 846 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Warwick, 7 mi away
60/100CR ScoreRanked #3 because of its Google rating and review volume: 4.9★ from 1,027 Google reviews, the most in Johnston.
Based on 8 of 10 factors; credentials and recency not yet collected.
#4 ProSeptic
Based in East Greenwich, 18 mi away
60/100CR ScoreRanked #4 because of its Google rating and trade focus: 5.0★ from 123 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Putnam, 14 mi away
60/100CR ScoreRanked #5 because of its Google rating and trade focus: 4.8★ from 85 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Johnston
59/100CR ScoreRanked #6 because of its Google rating and trade focus: 4.7★ from 59 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
#7 ADC Septic
Based in Blackstone, 14 mi away
58/100CR ScoreRanked #7 because of its Google rating and trade focus: 4.7★ from 53 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Haverhill, 17 mi away
58/100CR ScoreRanked #8 because of its Google rating and trade focus: 5.0★ from 47 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Pawtucket, 7 mi away
58/100CR ScoreRanked #9 because of its Google rating and trade focus: 5.0★ from 77 Google reviews, listed on Google as “Plumber”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Worcester, 25 mi away
58/100CR ScoreRanked #10 because of its Google rating and trade focus: 5.0★ from 590 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Foxborough, 22 mi away
58/100CR ScoreRanked #11 because of its Google rating and trade focus: 4.9★ from 366 Google reviews, listed on Google as “Septic system service”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
Based in Plainfield, 17 mi away
58/100CR ScoreRanked #12 because of its Google rating and trade focus: 5.0★ from 40 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Providence, 16 mi away
58/100CR ScoreRanked #13 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 Seekonk, 9 mi away
58/100CR ScoreRanked #14 because of its Google rating and trade focus: 5.0★ from 68 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Providence, 5 mi away
58/100CR ScoreRanked #15 because of its Google rating and trade focus: 5.0★ from 43 Google reviews, listed on Google as “Plumber”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in East Providence, 10 mi away
57/100CR ScoreRanked #16 because of its Google rating and trade focus: 5.0★ from 73 Google reviews, listed on Google as “Plumber”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Swansea, 16 mi away
57/100CR ScoreRanked #17 because of its Google rating and review volume: 5.0★ from 150 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
#18 Friendly Septic
Based in Warwick, 18 mi away
56/100CR ScoreRanked #18 because of its Google rating and trade focus: 4.4★ from 57 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Johnston
56/100CR ScoreRanked #19 because of its Google rating and trade focus: 4.1★ from 34 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Blackstone, 15 mi away
56/100CR ScoreRanked #20 because of its Google rating and trade focus: 4.7★ from 329 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Providence, 16 mi away
55/100CR ScoreRanked #21 because of its Google rating and trade focus: 5.0★ from 8 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Hopkinton, 18 mi away
55/100CR ScoreRanked #22 because of its Google rating and trade focus: 4.6★ 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 Coventry, 11 mi away
55/100CR ScoreRanked #23 because of its Google rating and trade focus: 5.0★ from 15 Google reviews, listed on Google as “Septic system service”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
Based in Somerset, 19 mi away
55/100CR ScoreRanked #24 because of its Google rating and trade focus: 5.0★ from 8 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in South Kingstown, 19 mi away
54/100CR ScoreRanked #25 because of its Google rating and trade focus: 5.0★ from 8 Google reviews, listed on Google as “Septic system service”.
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 109 ranked septic service companies here; the rest are on their profiles.
Also serving Johnston
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 |
|---|---|---|
| All Clean Inc | 3.0★ (2) | 7 mi |
| AW Pump Pawtucket, RI - Sewer Pump & Well Tank Installation Service | 5.0★ (2) | 7 mi |
| Blue Line Septic | 5.0★ (2) | 4 mi |
| CDM Septic & Construction | 1.0★ (1) | 16 mi |
| D. A. Plante Inc | 5.0★ (1) | 9 mi |
| Haulin Oats Discount Septic Pumping | 5.0★ (1) | 18 mi |
| Hilltop Contractors, LLC | 5.0★ (2) | 24 mi |
| M G Stanick Septic Pumping Services | 4.5★ (2) | 20 mi |
| MDC Excavation & Trucking | 5.0★ (2) | 10 mi |
| Monster-Vac | 5.0★ (2) | 20 mi |
| Nadeau Electric | In Johnston | |
| Peter's Excavating & Landscape Construction LLC | 5.0★ (2) | 21 mi |
| Septi-Cate Services | 1.0★ (1) | 13 mi |
| Slims & Berthiaume Sewer Service Inc | 5.0★ (2) | 20 mi |
| Stula Enterprises LLC | 5.0★ (1) | 17 mi |
| Tech 1 Plumbing & Heating | 1.0★ (1) | 4 mi |
| Tri - State Mechanical Services llc | In Johnston | |
| United Rentals - Reliable Onsite Services | 5.0★ (2) | 19 mi |
| Wilcox Excavation & Development LLC. | 1.0★ (1) | 18 mi |
| Wind River Environmental of Johnston, RI | In Johnston |
How we ranked Johnston septic service companies
We scored 109 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, RI is JL Darling Septic Tank Pumping with a CR Score of 63/100. It has 5.0★ from 382 Google reviews. It is open 24/7. Wind River Environmental of Walpole, MA (#2) and Mr. Rooter Plumbing of Rhode Island (#3) follow. We ranked 109 septic service companies on ten factors, last updated November 3, 2026.
How many septic service companies are there in Johnston?
ContractorsRanked ranks 109 septic service companies serving Johnston, RI. 2 of them are based in Johnston; 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 Johnston are open 24/7?
28 ranked septic service companies in Johnston post 24/7 hours. The highest-ranked are JL Darling Septic Tank Pumping (#1), Wind River Environmental of Walpole, MA (#2) and Mr. Rooter Plumbing of Rhode Island (#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?
65 of 109 ranked septic service companies post Saturday hours and 39 post Sunday hours. The highest-ranked open Saturdays are JL Darling Septic Tank Pumping (#1), Wind River Environmental of Walpole, MA (#2) and Mr. Rooter Plumbing of Rhode Island (#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 109 rated septic service companies in Johnston is 4.8★, with a median of 16 reviews. Mr. Rooter Plumbing of Rhode Island has the most, 1,027 reviews, and ranks #3. 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 109 septic service companies serving Johnston.
More septic service companies and Johnston pages
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