Environmental guidance for your business in Northern Ireland & Scotland
If your business has air-conditioned offices or carries out a manufacturing process that uses water as a coolant, it may have a cooling tower.
Cooling towers remove heat from circulating cooling water systems, so that the water can be recirculated. The heat removed from the water is released to the atmosphere.
Most large buildings with offices, classrooms, lecture theatres or laboratories have systems that control the heating and cooling of air in the building. Sports facilities and swimming pools also use these systems. Many of these systems have cooling towers or heat exchangers which are often situated on the roof of the building.
If you have a cooling tower or an evaporative condenser, you must notify your local council. You must also tell them if you make any changes to your cooling tower or if you stop using it. Ask your local council's environmental health department for a cooling tower registration or notification form.
Your local council and the Health and Safety Executive (HSE) or the Health and Safety Executive for Northern Ireland (HSE NI) will carry out regular inspections to ensure that your cooling tower meets safety standards.
If your cooling tower is part of a large installation you may need a pollution prevention and control (PPC) permit. If you are not sure whether you need a permit, contact your environmental regulator.
You must keep cooling tower systems in good condition. If they are not properly maintained they can create the ideal habitat for certain bacteria, in particular Legionella which causes Legionnaires' disease.
You must register your cooling tower with your local council so that they can identify areas where there is a risk of the spread of infectious disease.
Cooling tower fans may be noisy and cause a nuisance to the surrounding community.
If you think your cooling tower fans might cause a nuisance, you should discuss your operations with:
It is best to do this before you receive any complaints. If noise levels are too high, your local council or environmental regulator can stop your operations.
Fit ventilation silencers to your cooling tower fan inlet and discharge vents to reduce noise levels.
See our guidance on noise, odour and all nuisances.
If you discharge any cooling tower effluents or cooling tower blowdown to surface waters, groundwater, land or public sewers, you must have a permit or licence.
See our guidance on trade effluent .
See our guidance on water pollution.
If you are not sure whether you need a permit or licence, contact your environmental regulator or your water and sewerage company or authority.
Inspect your cooling towers regularly. Be aware that your local council and the HSE or HSE NI will visit your premises to ensure you meet safety standards.
You should clean cooling towers:
Employ specialists to carry out cleaning. Cleaning will improve cooling tower efficiency and minimise the risk of disease.
You may store chemicals on your site, for example for maintenance. Chemicals you receive may be supplied with a safety data sheet (SDS). The SDS contains information about the chemical, including how to store, use and dispose of it safely. The SDS may also recommend the best methods and materials to use to clean up a spill. If you receive a chemical without an SDS, contact your supplier to find out whether or not they have to provide one.
For more information see our guidance on chemical storage.
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