How much does a Sewer Smoke Testing Service cost to buy?

A typical Sewer Smoke Testing Service sells for 2.5x to 4.5x annual revenue. With average revenue of $450K, expect to pay $1.1M to $2.0M.

How much does it cost to start a Sewer Smoke Testing Service?

Startup costs range from $25K to $75K depending on location, equipment, and scale.

Service

Sewer Smoke Testing Service

Q: What are the profit margins for a Sewer Smoke Testing Service?

The average profit margin for a Sewer Smoke Testing Service is around 45%. At $450K revenue: labor for field crew runs 30–35%, vehicle and equipment adds 10–12%, smoke fluid and supplies adds 3–5%, and bonding/insurance/overhead adds 8–10%. Net margins of 42–50% are achievable for owner-operators running a single crew. Second crew compresses margins to 30–38% until fully utilized.

Municipalities pay contractors to find illegal sewer connections — you pump the smoke

Sewer smoke testing is how municipalities, utilities, and industrial facilities locate illegal connections, infiltration points, and structural defects in underground sewer systems without excavation. The operator pumps non-toxic smoke into a sewer main segment; smoke emerging from unexpected locations — roof vents, yard drains, basement floor drains, storm grates — identifies defective connections or damaged pipe. EPA combined sewer overflow (CSO) regulations and CMOM (Capacity, Management, Operation and Maintenance) programs require utilities to maintain and document their sewer infrastructure, creating a mandated recurring revenue stream. A two-person crew with a smoke blower unit can test 1,500–3,000 linear feet of sewer per day at $0.25–$0.65/LF on municipal contracts.

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Avg Revenue

$450K

Profit Margin

45%

Acquisition Multiple

2.5x - 4.5x

Startup Cost

$25K - $75K

Difficulty

3/5

How It Works

The operator bids on municipal sewer assessment contracts, typically issued by public works departments and wastewater utilities. Work is scheduled in segments, with prior notice sent to residents in the test area. A smoke blower unit injects harmless white smoke into the sewer main via an access manhole; the crew walks the right-of-way and documents every observation (smoke from roof vent = correct; smoke from yard = defect; smoke from storm drain = illicit connection). Reports are delivered digitally with GPS coordinates and photographs. Operators often expand into CCTV camera inspection, flow monitoring, and manhole assessment to increase per-contract revenue and lock in multi-year utility relationships.

Revenue Range

Low End

$200K

Typical

$450K

High End

$900K

Pros

+EPA-mandated compliance work makes this a non-discretionary budget item for utilities, not a discretionary project
+Low equipment cost relative to contract value — a commercial smoke blower costs $4K–$12K and enables $200K+/year in contracts
+Government contracts provide predictable multi-year revenue with clear renewal cycles
+Expansion into CCTV inspection and flow monitoring multiplies revenue from the same client base

Cons

-Municipal procurement is slow — 6–18 month sales cycles with formal bid processes and incumbent relationships to displace
-Work requires proximity to project sites; hard to scale nationally without multiple regional crews
-Public-facing work requires advance resident notification and occasional complaint management

Best For

Operators who understand municipal procurement and want a compliance-driven service business with government contract stability

Operating Costs

At $450K revenue: labor for field crew runs 30–35%, vehicle and equipment adds 10–12%, smoke fluid and supplies adds 3–5%, and bonding/insurance/overhead adds 8–10%. Net margins of 42–50% are achievable for owner-operators running a single crew. Second crew compresses margins to 30–38% until fully utilized.