Cooling Tower Cleaning & Disinfection
Hospitals legally cannot let their cooling towers grow Legionella — you stop that for $4K a visit
Bottom line
Attractive margins, but operations need a serious buyer.
Cooling tower cleaning operators decontaminate, disinfect, and disinfect-test the open evaporative cooling towers atop hospitals, data centers, manufacturing plants, and large office buildings. ASHRAE 188 and (in NYC, NJ, and growing) state law require quarterly cleaning and Legionella culture testing — a single 500-ton tower runs $2,500–$6,000 per cleaning, twice a year minimum. Recurring annual contracts on 40–80 towers gross $400K–$1.2M with 35–45% margins. The work is dirty, OSHA-regulated, and almost no general HVAC company touches it — leaving fat margins for specialists.
How It Works
Crews of 2–3 OSHA-trained technicians arrive at a building rooftop, lock out the tower, drain and pressure-wash the basin and fill media, scrape biofilm, apply EPA-registered biocide, and pull water samples for a third-party Legionella PCR culture lab. Reports are filed for OSHA/ASHRAE 188 compliance. Most contracts are 3-year, twice-yearly cleanings with quarterly water-treatment add-ons. NYC's Local Law 77 created a permanent compliance market post-2015 Bronx outbreak; states are copying it. Buyers pay 3x SDE because the contract book is sticky and license-mandated.
BizBite verdict
Watch / verify
Cooling Tower Cleaning & Disinfection has enough high-level data for a first look, but BizBite has not assigned a category-specific operating model yet. Treat the score as preliminary.
Why it may work
- +Attractive 40% estimated margin profile
Be careful
- !Source link status has not been verified yet
- !No last-checked date yet
- !No SBA category enrichment yet
- !No category operating model yet
- !Low data confidence
Deal Calculator
Priced off $240K SDE — can this deal service its own debt?
SDE = revenue × margin estimate for this niche; it includes owner compensation, so budget your salary out of cash flow. Excludes working-capital injection, capex reserves, and taxes. Actual SBA terms vary by lender and borrower.
Pros
- +Legally mandated by ASHRAE 188 and a growing list of state Legionella laws — non-discretionary spend
- +Recurring multi-year contracts with hospitals, universities, and data centers
- +High barriers — OSHA confined-space training, water treatment licensing — keep generalists out
- +Specialists trade at 3x SDE with sticky contract books
Cons
- -Confined-space and rooftop work — workers' comp insurance is expensive
- -Legionella outbreak liability is real — must carry $2M+ general liability
- -Crew turnover is high — work is physically grueling
Best For
HVAC or water treatment operators in dense metros (NYC, NJ, Chicago, Boston, SF) ready to pursue ASHRAE 188 compliance contracts
Operating Costs
Primary costs are technician labor ($28–$45/hr loaded), biocide chemicals, third-party Legionella lab fees ($75–$150/sample), and rooftop access equipment. Liability and workers' comp insurance commonly run 8–12% of revenue.
Where to Buy
Search 'cooling tower' or 'water treatment' — specialty cleaning operators occasionally list
Industry body — member directory and CWT certification for water treatment professionals
Cooling tower industry standards body and member network
Buyer's Toolkit
Essential tools to get started
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Largest business-for-sale marketplace in the US
SBA loans and business acquisition financing — get funded fast
ROBS financing — use retirement funds to buy a business tax-free
Bookkeeping for small business owners — hands-off financials
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