problems_content_06.jpg Cooling tower water is continuously exposed to airborne organic materials, and the buildup of bacteria, algae, fungi, and viruses present hazards to the tower system and to the health of humans encountering the water. For example, Legionnaire's Disease is caused by the bacterium Legionella, pneumophila that frequently thrives in cooling tower environments. High levels of bacteria can also lead to an increased risk of microbially influenced corrosion. Sulfate-reducing and iron-metabolizing bacteria can destroy iron piping in as little as nine months.

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