Mechanical Cleaning that Removes What's Stuck to Your System
Cooling towers accumulate scale, sludge, and biofilm that no amount of water treatment chemistry can fully remove on its own. BMS CAT provides nationwide mechanical cleaning for commercial and industrial cooling towers, pressure washing and manual removal of the buildup that harbors Legionella, drags down efficiency, and shortens equipment life.
Whether it's a scheduled seasonal assessment or an urgent contamination response, our teams are ready 24/7.
What is Cooling Tower Cleaning?
Cooling tower cleaning is the physical removal of scale, sediment, sludge, and biofilm from a tower's basin, fill, and structural components. It's a mechanical process, pressure washing and manual scrubbing, distinct from water treatment, which manages the chemistry of the water (biocides, descalers, corrosion inhibitors) on an ongoing basis. Facilities need both: water treatment controls what's in the water day to day, and periodic cleaning removes what's already built up on the system. The CDC's Legionella Control Toolkit sets annual cleaning as the minimum baseline; ASHRAE Guideline 12 and most tower manufacturers recommend twice a year.
Why Choose BMS CAT for Your Cooling Tower Needs?
When performance, cleanliness, and compliance matter, BMS CAT delivers results that go beyond surface-level fixes. Here’s why facility managers, engineers, and property owners across the country trust us:
Cleaning and Water Treatment: Two Different Jobs
The single most common point of confusion we hear from facility teams: cleaning and water treatment are not the same service, and one doesn't replace the other.
- Water treatment controls what's in the water — ongoing chemistry management: biocides, descalers, corrosion inhibitors, disinfection.
- Cleaning removes what's stuck to the system — the sediment, scale, and biofilm that chemistry alone can't fully clear once it's built up.
BMS CAT's role is the mechanical side: cold-water pressure washing and manual removal, with no chemicals or disinfectants added during our cleaning process. That means our work doesn't interfere with your existing water treatment program, and we coordinate directly with your water treatment provider before and after service. Removing the buildup that harbors Legionella and bacteria is the mechanical half of Legionella risk management — disinfection remains your water treatment provider's responsibility, and both are required inputs to a complete water management program.
Reliable and
Trusted Team Of
Restoration Experts
Our Proven Cooling Tower Cleaning Process
Cooling towers require more than just surface-level cleaning—they demand a structured, safety-first approach built on compliance and precision. At BMS CAT, we follow strict industry guidelines and use advanced tools to restore your cooling tower to peak condition. Our process is backed by standardized protocols from NADCA, and OSHA, ensuring safety, compliance, and performance at every step.
All procedures align with OSHA and ASHRAE Guideline 12 cleaning standards. Our technicians are trained in confined space entry, and PPE compliance, so the work is done safely and documented thoroughly.
Why Is Cooling Tower Cleaning Important?
Cooling towers play a critical role in maintaining safe and efficient HVAC and industrial systems. When they aren’t cleaned regularly, they can become breeding grounds for bacteria, energy drains, and sources of costly damage.
To see how cooling towers function within your system, refer to the diagram:
“Why Is an Industrial Cooling Tower Needed?”
Regular cleaning matters for several key reasons:
- Removes harmful biofilms, sludge, and bacteria
Cleaning helps eliminate contaminants that pose serious health risks, including Legionella. - Improves energy efficiency and reduces system strain
A clean tower allows for better heat transfer, which helps your chillers and pumps run more efficiently. - Extends equipment and cooling system lifespan
Removing buildup and corrosion reduces wear and helps your system last longer with fewer breakdowns. - Supports OSHA and ASHRAE aligned water management practices
Routine mechanical cleaning is one required component of a facility's overall compliance posture; disinfection and ongoing water chemistry remain the water treatment provider's responsibility.
For any facility that relies on cooling towers, whether a hospital, data center, or manufacturing plant, routine cleaning isn’t just good practice. It’s essential to long-term performance and safety.
How Often Should a cooling tower be cleaned?
The right cleaning frequency isn't really a calendar question, it depends on whether your tower gets a true seasonal shutdown or runs year-round. ASHRAE Guideline 12 ties cleaning requirements to that operating pattern, not to a fixed number of visits, which is why the answer differs by market:
- Seasonal / shutdown markets (most northern and many central U.S. facilities): The CDC's Legionella Control Toolkit sets annual cleaning as the compliance floor, remove the tower from service, clean it, and disinfect at least once a year. ASHRAE Guideline 12 and most manufacturers recommend twice a year (spring and fall) as the stronger standard for equipment protection and risk reduction.
- Year-round operating markets (Gulf Coast, Florida, Southern California, and similar climates with no natural shutdown): An annual or biannual offline deep clean is still the baseline, but towers in these markets typically also benefit from a quarterly Online/Basin Sweeper Service, a no-shutdown sediment sweep that keeps buildup from accumulating between deep cleans, since the tower never gets an idle period to fall back on.
In short: how often depends on where your facility is and how your tower operates, not a single number that applies everywhere. BMS CAT offers all three cadences through scheduled maintenance programs, so your plan matches your system rather than a generic recommendation.
Cleaning is one required input to Legionella risk management, not a standalone guarantee of compliance. Disinfection and water chemistry management remain your water treatment provider's responsibility. Consult ASHRAE Guideline 12 and your water treatment provider for a program tailored to your system.
Common Cooling Tower Problems We Handle
Cooling towers are exposed to extreme conditions, and they fail for predictable reasons. Our technicians are trained to identify and eliminate the most common threats, including:
- Corrosion & Rust
- Scale Buildup
- Bacteria & Mold (Including Legionella)
- Reduced Efficiency from Sediment Buildup
- Structural Deterioration
Ignoring these issues won’t just raise energy costs—it can shut down entire systems. That’s why property managers, facility directors, and industrial teams call BMS CAT first.
Our Safety Standards
At BMS CAT, safety is a core priority. Every cooling tower project begins with a site-specific safety plan and a detailed Job Hazard Analysis (JHA) to identify and mitigate risks upfront. Our technicians are certified in OSHA 10/30, Lockout/Tagout (LOTO), and Confined Space entry, and they strictly follow PPE protocols, including respirators, chemical suits, and fall protection.
Any pre-cleaning disinfection is coordinated with your water treatment provider and typically completed 24–48 hours before our crews arrive, so BMS CAT's process stays strictly mechanical, no chemical transport or handling required on our end. All work is documented through detailed service and close-out reports, including customer-approved before-and-after photos.
Industries & Teams We Serve
Cooling tower cleaning is critical for facilities that rely on uninterrupted cooling and strict hygiene standards. We work across a range of industries, including:
Industries We Support:
- Data Centers
- Hospitals and Healthcare Facilities
- Food Processing Plants
- Hotels and Casinos
- Universities and Schools
- Commercial Real Estate & High-Rises
We Commonly Partner With:
- Safety and Hygiene Officers
- Building Owners and General Managers
- Water Treatment Providers
Whether you manage a mission-critical environment or a multi-tenant building, our team brings the expertise and reliability you need.
A Cleaning Plan Built Around How Your Tower Actually Runs
Not every facility needs the same cleaning schedule, because not every tower operates the same way. Rather than one fixed plan, BMS CAT tailors your cleaning cadence to how your system runs and where it's located:
- Single Cleaning — A one-time deep clean, whether it's a first assessment, an emergency response, or a facility not ready to commit to a recurring schedule yet.
- Annual Care — One scheduled offline cleaning per year, timed to your facility's preferred season. This is the baseline for towers that get a true seasonal shutdown.
- Biannual Assurance — Two scheduled offline cleanings per year (spring and fall), aligned with ASHRAE Guideline 12 and manufacturer recommendations for the strongest long-term protection.
- Quarterly / Basin Sweeper Service — For facilities in year-round operating markets (Gulf Coast, Florida, Southern California) where towers don't get a natural seasonal shutdown, a recirculating basin sweeper keeps sediment agitated and filtered out of the basin between deep cleans, no drain, no full shutdown required. This supplements, rather than replaces, the annual offline deep clean.
We'll help you figure out which cadence actually fits your system, operating pattern, and climate, not sell you the same plan as the facility down the street.
Cooling Tower Services – Frequently Asked Questions
