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Best Septic Service Companies in Flagstaff, AZ (2026)

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

The short answer

  1. 1

    Best overall in Flagstaff: Busy B Septic Cleaning LLC, CR Score 61/100; 4.5★ from 31 Google reviews; open 24/7.

  2. 2

    Best for emergencies (open 24/7): AZ ALTERNATIVE SEPTIC SOLUTIONS LLC, posts 24/7 hours; ranked #2 of 10.

  3. 7

    Most-reviewed: ACE Home Services (formerly AZ Best Plumbing), 694 Google reviews at 4.7★, the most of 10 ranked; ranked #7.

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

10 Flagstaff septic service companies are ranked here by CR Score, from ten published factors. 5 are open 24/7, 5 open Saturdays and 5 open Sundays, based on posted hours. The median Google rating is 4.6★ across 10 rated businesses.

Top 10 septic service companies in Flagstaff at a glance

Top 10 septic service companies in Flagstaff at a glance
RankBusinessCR ScoreGoogle ratingBased inHoursBest for
1Busy B Septic Cleaning LLC614.5★ (31)Flagstaff24/7Overall
2AZ ALTERNATIVE SEPTIC SOLUTIONS LLC604.8★ (17)Flagstaff24/7Emergencies
3ACE Home Services604.9★ (295)Flagstaff24/7—
4First Class Sanitation574.8★ (47)Flagstaff——
5Bluebrook Excavating555.0★ (14)Flagstaff——
6Steve's High Country Sanitation LLC554.4★ (45)Flagstaff24/7—
7ACE Home Services (formerly AZ Best Plumbing)544.7★ (694)Sedona, 25 mi away24/7Most reviews
8Septic Service544.5★ (11)Flagstaff——
9H&R Septic Services LLC533.8★ (17)Flagstaff——
10SOS Water & Waste Water463.7★ (3)Sedona, 23 mi away——

The 10 best septic service companies in Flagstaff, 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 Bluebrook Excavating

    Based in Flagstaff

    55/100CR Score

    Ranked #5 because of its Google rating and trade focus: 5.0★ from 14 Google reviews, listed on Google as “Septic system service”.

    • 5.0★ from 14 Google reviews
    Hours
    Mon–Thu 8 AM–4:30 PM · Fri 9 AM–4:30 PM · Sat–Sun closed
    Address
    11420 N Crisp Hill Cir, Flagstaff, AZ 86004
    View profile for Bluebrook Excavating(928) 699-8479

  8. #8 Septic Service

    Based in Flagstaff

    54/100CR Score

    Ranked #8 because of its Google rating and trade focus: 4.5★ from 11 Google reviews, listed on Google as “Septic system service”.

    • 4.5★ from 11 Google reviews
    Hours
    Mon–Fri 8 AM–5 PM · Sat–Sun closed
    Address
    10450 Ghost Rider Trail, Flagstaff, AZ 86004
    View profile for Septic Service(928) 779-2144

  10. #10 SOS Water & Waste Water

    Based in Sedona, 23 mi away

    46/100CR Score

    Ranked #10 because of its Google rating and trade focus: 3.7★ from 3 Google reviews, listed on Google as “Septic system service”.

    • 3.7★ from 3 Google reviews
    Hours
    Mon–Thu 8 AM–4 PM · Fri 8 AM–12 PM · Sat–Sun closed
    Address
    450 Jordan Rd B, Sedona, AZ 86336
    View profile for SOS Water & Waste Water(928) 282-8528

Also serving Flagstaff

3 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 Flagstaff
BusinessGoogle ratingDistance
Septic Service Excavation LLCIn Flagstaff
Septic Service LLCIn Flagstaff
Smitty's Excavating5.0★ (2)In Flagstaff

How we ranked Flagstaff septic service companies

We scored 10 Flagstaff 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 Flagstaff 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 Flagstaff: frequently asked questions

Who is the best septic service company in Flagstaff?

By CR Score, the highest-ranked septic service company in Flagstaff, AZ is Busy B Septic Cleaning LLC with a CR Score of 61/100. It has 4.5★ from 31 Google reviews. It is open 24/7. AZ ALTERNATIVE SEPTIC SOLUTIONS LLC (#2) and ACE Home Services (#3) follow. We ranked 10 septic service companies on ten factors, last updated November 2, 2026.

How many septic service companies are there in Flagstaff?

ContractorsRanked ranks 10 septic service companies serving Flagstaff, AZ. 8 of them are based in Flagstaff; the rest serve it from nearby towns. Another 3 within 25 mi are listed but not ranked yet. Counts are as of November 2026.

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

5 ranked septic service companies in Flagstaff post 24/7 hours. The highest-ranked are Busy B Septic Cleaning LLC (#1), AZ ALTERNATIVE SEPTIC SOLUTIONS LLC (#2) and ACE Home Services (#3). Hours come from each business's Google listing as of November 2026, so call to confirm.

Which septic service companies in Flagstaff work on weekends?

5 of 10 ranked septic service companies post Saturday hours and 5 post Sunday hours. The highest-ranked open Saturdays are Busy B Septic Cleaning LLC (#1), AZ ALTERNATIVE SEPTIC SOLUTIONS LLC (#2) and ACE Home Services (#3). Posted hours are office hours; crews may book weekend jobs separately.

What Google rating do Flagstaff septic service companies have?

The median Google rating among 10 rated septic service companies in Flagstaff is 4.6★, with a median of 24 reviews. ACE Home Services (formerly AZ Best Plumbing) has the most, 694 reviews, and ranks #7. 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 Flagstaff count in this ranking?

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

  1. November 2026: CR Scores recalculated for 10 septic service companies serving Flagstaff.

More septic service companies and Flagstaff pages

Other trades in Flagstaff