“…Maintain your pools, plumbing systems, drinking water systems, and hot tubs properly. Because high water temperatures make it hard to maintain the disinfectant levels needed to kill germs like Legionella, make sure that your pools, hot tubs, plumbing systems, decorative fountains, and drinking water systems…”
Read the full article and see resources at
http://www.acacamps.org/knowledge/health/legionnaires-disease