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Best Septic Service Companies in Paso Robles, CA (2026)

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

The short answer

  1. 1

    Best overall in Paso Robles: North County Septic Service Inc., CR Score 68/100; 5.0★ from 98 Google reviews; open 24/7.

  2. 10

    Best for emergencies (open 24/7): Roto-Rooter Plumbing & Water Cleanup, posts 24/7 hours; ranked #10 of 11.

  3. 3

    Most-reviewed: Sewer Oscopy West LLC, 55 Google reviews at 5.0★, the most of 11 ranked after North County Septic Service Inc.; ranked #3.

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

11 Paso Robles septic service companies are ranked here by CR Score, from ten published factors. 2 are open 24/7, 3 open Saturdays and 2 open Sundays, based on posted hours. The median Google rating is 4.8★ across 11 rated businesses.

Top 10 septic service companies in Paso Robles at a glance

Top 10 septic service companies in Paso Robles at a glance
RankBusinessCR ScoreGoogle ratingBased inHoursBest for
1North County Septic Service Inc.685.0★ (98)Paso Robles24/7Overall
2Alliance Septic Service594.8★ (22)Paso Robles——
3Sewer Oscopy West LLC585.0★ (55)Atascadero, 8 mi awaySatMost reviews
4Ingram & Greene Sanitation575.0★ (24)Atascadero, 10 mi away——
5Precision Septic, Inc.554.7★ (15)Atascadero, 10 mi away——
6Alliance Septic Service554.3★ (6)Paso Robles——
7On Site Plumbing & Septic544.8★ (19)Atascadero, 20 mi awayEvenings—
8Clay's Septic & Jetting Inc524.7★ (3)Paso Robles——
9Al's Septic Pumping Services515.0★ (7)Los Osos, 19 mi away——
10Roto-Rooter Plumbing & Water Cleanup504.1★ (22)San Luis Obispo, 23 mi away24/7Emergencies

The 11 best septic service companies in Paso Robles, ranked

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

  2. #2 Alliance Septic Service

    Based in Paso Robles

    59/100CR Score

    Ranked #2 because of its Google rating and trade focus: 4.8★ from 22 Google reviews, listed on Google as “Septic system service”.

    Based on 8 of 10 factors; credentials and recency not yet collected.

    • 4.8★ from 22 Google reviews
    Hours
    Mon–Fri 8 AM–5 PM · Sat–Sun closed
    View profile for Alliance Septic Service(805) 221-5493

  3. #3 Sewer Oscopy West LLC

    Based in Atascadero, 8 mi away

    58/100CR Score

    Ranked #3 because of its Google rating and review volume: 5.0★ from 55 Google reviews.

    Based on 8 of 10 factors; credentials and recency not yet collected.

    • 5.0★ from 55 Google reviews
    Hours
    Mon–Sat 8 AM–6 PM · Sun closed
    Address
    3535 Blackhawk Dr, Atascadero, CA 93422
    View profile for Sewer Oscopy West LLC(805) 769-6550

  5. #5 Precision Septic, Inc.

    Based in Atascadero, 10 mi away

    55/100CR Score

    Ranked #5 because of its Google rating and trade focus: 4.7★ from 15 Google reviews, listed on Google as “Septic system service”.

    Based on 8 of 10 factors; credentials and recency not yet collected.

    • 4.7★ from 15 Google reviews
    Hours
    Mon–Fri 8 AM–5 PM · Sat–Sun closed
    View profile for Precision Septic, Inc.(805) 859-4885

  6. #6 Alliance Septic Service

    Based in Paso Robles

    55/100CR Score

    Ranked #6 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.

    • 4.3★ from 6 Google reviews
    Hours
    Mon–Fri 8 AM–5 PM · Sat–Sun closed
    Address
    3155 Nacimiento Lake Dr, Paso Robles, CA 93446
    View profile for Alliance Septic Service(805) 221-5493

  7. #7 On Site Plumbing & Septic

    Based in Atascadero, 20 mi away

    54/100CR Score

    Ranked #7 because of its Google rating and trade focus: 4.8★ from 19 Google reviews, listed on Google as “Septic system service”.

    Based on 8 of 10 factors; credentials and recency not yet collected.

    • 4.8★ from 19 Google reviews
    Hours
    Mon–Fri 7 AM–7 PM · Sat–Sun closed
    View profile for On Site Plumbing & Septic(805) 464-7332

  11. #11 Drain Doctors Plumbing

    Based in San Luis Obispo, 25 mi away

    49/100CR Score

    Ranked #11 because of its Google rating and review volume: 4.8★ from 52 Google reviews.

    Based on 8 of 10 factors; credentials and recency not yet collected.

    • 4.8★ from 52 Google reviews
    Hours
    Mon–Fri 8 AM–6 PM · Sat–Sun closed
    Address
    205 South St, San Luis Obispo, CA 93401
    View profile for Drain Doctors Plumbing(805) 544-1214

Also serving Paso Robles

8 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.

Unranked septic service companies serving Paso Robles
BusinessGoogle ratingDistance
Al's Septic Pumping Services5.0★ (1)23 mi
Clay's Septic & Jetting Inc22 mi
Clay's Septic Services3.0★ (2)10 mi
Clay's Septic Services5.0★ (2)24 mi
Royal Flush Sewer and Drain Cleaning5.0★ (2)20 mi
Story's Construction23 mi
Valley Septic4.0★ (1)10 mi
Valley Septic1.0★ (1)23 mi

How we ranked Paso Robles septic service companies

We scored 11 Paso Robles 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.

Read the full method: formula, sources and exclusions

CR Score factors and weights
FactorWeightComputed fromIn Paso Robles 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 Paso Robles: frequently asked questions

Who is the best septic service company in Paso Robles?

By CR Score, the highest-ranked septic service company in Paso Robles, CA is North County Septic Service Inc. with a CR Score of 68/100. It has 5.0★ from 98 Google reviews. It is open 24/7. Alliance Septic Service (#2) and Sewer Oscopy West LLC (#3) follow. We ranked 11 septic service companies on ten factors, last updated November 3, 2026.

How many septic service companies are there in Paso Robles?

ContractorsRanked ranks 11 septic service companies serving Paso Robles, CA. 4 of them are based in Paso Robles; the rest serve it from nearby towns. Another 8 within 25 mi are listed but not ranked yet. Counts are as of November 2026.

Which septic service companies in Paso Robles are open 24/7?

2 ranked septic service companies in Paso Robles post 24/7 hours. The highest-ranked are North County Septic Service Inc. (#1) and Roto-Rooter Plumbing & Water Cleanup (#10). Hours come from each business's Google listing as of November 2026, so call to confirm.

Which septic service companies in Paso Robles work on weekends?

3 of 11 ranked septic service companies post Saturday hours and 2 post Sunday hours. The highest-ranked open Saturdays are North County Septic Service Inc. (#1), Sewer Oscopy West LLC (#3) and Roto-Rooter Plumbing & Water Cleanup (#10). Posted hours are office hours; crews may book weekend jobs separately.

What Google rating do Paso Robles septic service companies have?

The median Google rating among 11 rated septic service companies in Paso Robles is 4.8★, with a median of 22 reviews. North County Septic Service Inc. has the most, 98 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 Paso Robles count in this ranking?

Yes, if they are within 25 mi of the Paso Robles 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 Paso Robles

  1. November 2026: CR Scores recalculated for 11 septic service companies serving Paso Robles.

More septic service companies and Paso Robles pages

Other trades in Paso Robles